NES 769 Approval System for Welding Consumables for Structural Steels Category 2

Ministry of Defence Defence Standard 02-769 (NES 769)

Issue 1 Publication Date 01 April 2000

Incorporating NES 769 Category 2

Issue 4 Publication Date December 1992

Approval System For WeldingConsumables For Structural Steels

DStanDStan is now the publishing authority for all Maritime Standards (formerly NESs). Any reference to any other publishing authority throughout this standard should be ignored.Any queries regarding this or any other Defence Standard should be referred to the DStan Helpdesk as detailed at the back of this document.

AMENDMENT RECORD

Amd No Date Text Affected Signature and Date

REVISION NOTE

This standard is raised to Issue 1 to update its content.

HISTORICAL RECORD

This standard supersedes the following:

Naval Engineering Standard (NES) 769 Issue 4 dated December 1992.

Ministry of Defence

Naval Engineering Standard

NES 769 Issue 4 (Reformatted) December 1992

APPROVAL SYSTEM FOR WELDING CONSUMABLESFOR STRUCTURAL STEELS

This NES Supersedes

NES 769 ISSUE 3

Record of Amendments

AMDT INSERTED BY DATE

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2

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4

5

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iNAVAL ENGINEERING STANDARD 769

ISSUE 4 (INTERIM) (REFORMATTED)

APPROVAL SYSTEM FORWELDING CONSUMABLES

FOR STRUCTURAL STEELS

The issue and use of this Standard

is authorized for use in MOD contracts

by MOD(PE) Sea Systems and

the Naval Support Command

ECROWN COPYRIGHT

Published by:

Director of Naval ArchitectureProcurement Executive, Ministry of DefenceSea Systems, Foxhill, Bath BA1 5AB

NES 769Issue 4 (Reformatted)

iii

SCOPE

1. This NES defines the general requirements, production control, test procedures and approvalsystems for welding consumables for use on MOD(PE) SSC structural steels.

2. It includes the additional special evaluation test requirements to be conducted by DRADunfermline (Marine Division) for welding consumables intended for use with submarinesteels ie UXW, QT28, QT35, HY80 and QIN together with the requirements for consumablesintended to be used for welding MOD(PE) SSC structural steels to submarine steels.

3. The NES lists all the currently approved welding consumables at Annex D.


iv


v

FOREWORD

Sponsorship

1. ThisNaval Engineering Standard (NES) is sponsored by theProcurement Executive, Ministryof Defence, Director Naval Architecture (Submarines), (DNA(SM)), Section NA 115.

2. This NES is an interim issue prior to being reissued as a Three Part Standard. It has beenreissued to update the lists of approved Welding Consumables (Appendix B) and to reflectchanges in department nomenclature.

3. If it is found to be unsuitable for any particular requirement the Sponsor is to be informed inwriting with a copy to Director Naval Architecture (Surface Ships), (DNA(SS)), SectionNA 145, for Ship Systems and Equipment.

4. Any user of this NES either within MOD or in industry may propose an amendment to it.Proposals for amendments which are:

a. not directly applicable to a particular contract are to be made to the Sponsor of theNES;

b. directly applicable to a particular contract are to be dealt with using existing proceduresor as specified in the contract.

5. No alteration may be made to this NES except by the issue of an authorized amendment.

6. Unless otherwise stated, reference in this NES to approval, approved, authorized or similarterms means by the Ministry of Defence in writing.

7. Any significant amendments that may be made to this NES at a later date will be indicatedby a vertical sideline. Deletions will be indicated by 000 appearing at the end of the lineintervals.

8. Extracts from British Standards within this NES have been included with the permission ofthe British Standards Institution.

Conditions of Release

General

9. This Naval Engineering Standard (NES) has been prepared for the use of the Crown and ofits contractors in the execution of contracts for the Crown. The Crown hereby excludes allliability (other than liability for death or personal injury) whatsoever and howsoever arising(including but without limitation, negligence on the part of the Crown, its servants or agents)for any loss or damage however caused where the NES is used for any other purpose.

10. This document is Crown Copyright and the information herein may be subject to Crown orthird party rights. It is not to be released, reproduced or published without written permissionof the MOD.

11. The Crown reserves the right to amend or modify the contents of this NES without consultingor informing any holder.

MOD Tender or Contract Process

12. ThisNES is the property of the Crown and unless otherwise authorized in writing by theMODmust be returned on completion of the contract, or submission of the tender, in connectionwith which it is issued.


vi

13. When this NES is used in connection with aMOD tender or contract, the user is to ensure thathe is in possession of the appropriate version of each document, including related documents,relevant to each particular tender or contract. Enquiries in this connection may be made ofthe local MOD(PE) Quality Assurance Representative or the Authority named in the tenderor contract.

14. When NES are incorporated into MOD contracts, users are responsible for their correctapplication and for complying with contracts and any other statutory requirements.Compliance with an NES does not of itself confer immunity from legal obligations.

Related Documents

15. In the tender and procurement processes the related documents listed in each section andAnnex A can be obtained as follows:

a. British Standards British Standards Institution,389 Chiswick High Road,London W4 4AL

b. Defence Standards Directorate of Standardization and Safety Policy,Stan 1, Kentigern House, 65 Brown Street,Glasgow G2 8EX

c. Naval Engineering Standards CSE3a, CSE Llangennech, Llanelli,Dyfed SA14 8YP

d. Other documents Tender or Contract Sponsor to advise.

Note: Tender or Contract Sponsor can advise in cases of difficulty.

16. All applications to Ministry Establishments for related documents are to quote the relevantMOD Invitation to Tender or Contract Number and date, together with the sponsoringDirectorate and the Tender or Contract Sponsor.

17. Prime Contractors are responsible for supplying their subcontractors with relevantdocumentation, including specifications, standards and drawings.

Health and Safety

Warning

18. ThisNESmay call for the use of processes, substances and/or procedures thatmay be injuriousto health if adequate precautions are not taken. It refers only to technical suitability and inno way absolves either the supplier or the user from statutory obligations relating to healthand safety at any stage of manufacture or use. Where attention is drawn to hazards, thosequoted may not necessarily be exhaustive.


vii

CONTENTSPage No

TITLE PAGE i. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SCOPE iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FOREWORD v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Sponsorship v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Conditions of Release v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

General v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MOD Tender or Contract Process v. . . . . . . . . . . . . . . . . . . . . . . . . .

Related Documents vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Health and Safety vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Warning vi. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CONTENTS vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 1. GENERAL INFORMATION 1.1. . . . . . . . . . . . . . . . . .1.1 Batch Testing 1.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1.2 Other Consumables 1.1. . . . . . . . . . . . . . . . . . . . . . . . . .1.3 DRA Dunfermline (Marine Division) 1.1. . . . . . . . . . . .

SECTION 2. APPROVAL SYSTEM 2.1. . . . . . . . . . . . . . . . . . . . . . . .2.1 Electrode Manufacturers Approval 2.1. . . . . . . . . . . . .2.1.1 General 2.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.2 Initial Tests 2.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.3 Production Control 2.1. . . . . . . . . . . . . . . . . . . . . . . . . . .2.4 Periodic Check Tests 2.1. . . . . . . . . . . . . . . . . . . . . . . . . .2.5 Re-tests 2.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.6 Test Panels 2.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.7 Mechanical Properties 2.2. . . . . . . . . . . . . . . . . . . . . . . .2.8 Chemical Analysis 2.2. . . . . . . . . . . . . . . . . . . . . . . . . . . .

TABLE 2.1 2.2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.9 Welding Control Parameters (Welding Conditions

Used in Tests) 2.3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.10 Fabricators Approval 2.3. . . . . . . . . . . . . . . . . . . . . . . .

TABLE 2.2 WELDING CONSUMABLEAPPROVAL DATA MANUAL METALARC ELECTRODES 2.5. . . . . . . . . . . . . . . . . . . . . . . . .TABLE 2.3 WELDING CONSUMABLEAPPROVAL DATA SUBMERGED ARC 2.6. . . . . . . .TABLE 2.4 WELDING CONSUMABLEAPPROVAL DATA METAL INERT GAS 2.7. . . . . . . .

SECTION 3. MANUAL METAL ARC ELECTRODESELECTRODE MANUFACTURERS APPROVAL 3.1

3.1 Product Control Requirements 3.1. . . . . . . . . . . . . . . . .3.2 Test Requirements for all Classes of MMA

Electrodes including Hydrogen ControlledElectrodes 3.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


viii

SECTION 4. SUBMERGED ARCWELDING CONSUMABLES,ELECTRODE MANUFACTURERS APPROVAL 4.1

4.1 Product Control Requirements 4.1. . . . . . . . . . . . . . . . .4.2 Test Requirements for Submerged Arc Wire and

Flux Combinations 4.1. . . . . . . . . . . . . . . . . . . . . . . . . . .4.3 Initial Approval 4.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.4 Multi-Run Technique All-Weld Metal 4.2. . . . . . . . . . .4.5 Multi-Run Technique V-Butt Test 4.2. . . . . . . . . . . . . . .4.6 Square Edge Two Run Technique 4.2. . . . . . . . . . . . . . .4.7 Periodic Check Tests 4.3. . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 5. MIG WELDING CONSUMABLESELECTRODEMANUFACTURERS APPROVAL 5.1. . . . . . . . . . . . .

5.1 Product Control Requirements 5.1. . . . . . . . . . . . . . . . .5.2 Test Requirements for MIG Wire/Gas

Combinations 5.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.3 Initial Approval 5.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5.4 Multi-Run Technique All-Weld Metal 5.1. . . . . . . . . . .5.5 Multi-Run Technique V-Butt Test 5.1. . . . . . . . . . . . . . .5.6 Square Edge Two Run Technique 5.2. . . . . . . . . . . . . . .5.7 Periodic Check Tests 5.3. . . . . . . . . . . . . . . . . . . . . . . . . .

SECTION 6. CONSUMABLES FOR WELDING SUBMARINESTEELS 6.1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1 Batch Control 6.3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.2 Batch Definitions 6.3. . . . . . . . . . . . . . . . . . . . . . . . . . . .6.3 Batch Control Tests 6.4. . . . . . . . . . . . . . . . . . . . . . . . . .

ANNEX A. RELATED DOCUMENTS A.1. . . . . . . . . . . . . . . . . . . .

ANNEX B. DEFINITIONS AND ABBREVIATIONS B.1. . . . . . . .

ANNEX C. WELD METAL MECHANICAL PROPERTIESAND TEST PANEL REQUIREMENTS C.1. . . . . . . . .

ANNEX D. MOD(PE) SSC APPROVED WELDINGCONSUMABLES D.1. . . . . . . . . . . . . . . . . . . . . . . . . . . .

ANNEX E. PROCUREMENT CHECK LIST E.1. . . . . . . . . . . . . . .

ALPHABETICAL INDEX


1.1

1. GENERAL INFORMATION

1.1 Batch Testing

a. The consumables approved for use on submarine steels will be subject to batchtesting. (See Section 6.)

b. Consumables intended to be used for welding other MOD(PE) SSC structuralsteels to submarine steels will be subject to evaluation by DRA Dunfermline(Marine Division), but will be exempt from batch testing.

1.2 Other Consumables

a. The production use of other processes or consumables not contained within thisNES are to be subject to agreement between the fabrication and DNA(SM)NA 115.

1.3 DRA Dunfermline (Marine Division)

a. The tests carried out by DRA will be in conjunction with the weldingconsumable manufacturer and/or the fabricator.


1.2


2.1

2. APPROVAL SYSTEM

a. The approval system is to comprise two parts:

(1) Electrode manufacturers approval.

(2) Fabricators approval.

2.1 Electrode Manufacturers Approval

2.1.1 General

a. Compliance with the requirements contained in this NES will qualify thewelding consumable or combination of consumables for inclusion in theMOD(PE) SSC approved list, contained in Annex D.

b. Prior approval of the Procurement Executive, Ministry of Defence, DNA(SM)NA 115 is to be obtained in writing before supplying any consumablesmanufactured outside the UK. Where such approval is given consumables maybe subject to batch test control.

c. The requirements defined in Clauses 2.2a. to 2.10d. inclusive are to be met forall processes. For the purpose of these clauses the word consumables is used todescribe:

(1) Manual metal arc electrodes.

(2) Submerged arc wires and fluxes.

(3) Metal arc inert gas wires and gases or gas mixtures.

2.2 Initial Tests

a. These comprise the initial test to which each consumable is to be subjected. Itis implicit in the electrode manufacturers certification (see Clause 3.1a., 4.1a.and 5.1a.) that those DNA(SM) approved consumables in current productionare capable of satisfying the whole of these test requirements.

2.3 Production Control

a. BS 639 is to apply.

b. Each electrode manufacturer is to report to DNA(SM) NA 115, Foxhill, Bath,the details of the normal quality control system used at each manufacturingestablishment where consumables submitted for approval are made.

2.4 Periodic Check Tests

a. These consist of a selection of specified tests which are to be repeated at12 monthly intervals to provide evidence that the consumables currentlyproduced continue to possess the properties recorded in the initial tests. Withintwo months of the test panels being welded, the test results are to be submittedto DNA(SM) NA 115, Foxhill, Bath, through the Quality Assurancerepresentative. Approval will be deleted for any consumable which is not testedand reported on for any period exceeding 12 months.

b. Consumables may be upgraded by virtue of the results of periodic check testsand such additional tests as DNA(SM) may consider necessary.


2.2

2.5 Re-tests

a. When any test specimen fails to satisfy the test requirements, twice the numberof specimens specified for the initial periodic check, or batch tests, are to beprepared using consumables from the same batches under the originalconditions and shall be submitted to the test in which failure occurred. Whereit is necessary to change the welding conditions to attain the requiredmechanical properties then a complete set of tests at the new conditions shallbe done. Provided that all the tests of the additional specimens are satisfactorythe combinations will be accepted as having passed the tests.

2.6 Test Panels

a. The preparation of test panels and test methods follow the statedBS requirements, the base materials and acceptance/rejection criteria shall,however, be in accordance with Annex C.

2.7 Mechanical Properties

a. Weld Metal Mechanical Properties. The required weld metal mechanicalproperties for each MOD(PE) structural steel are defined in Annex C.

b. Where the stipulated properties are achieved for a particular material and theother requirements of this NES are met, approval may be noted accordingly.Where the properties for B quality steel are achieved then approval will alsobe noted formild steel. In the case ofmanual metal arc electrodes approval 4mmand above will qualify smaller sizes for the same approval.

2.8 Chemical Analysis

a. Where required within this NES chemical analysis shall be done. The samplefor analysis shall be obtained by drilling, machining ormilling in such amannerthat nometal is removed from within 6.5mm of the basematerial. Any standardanalysing procedure may be used, but the method used shall be stated in thereport.

b. The percentage contents of the elements shown in TABLE 2.1 is to be reportedunless otherwise agreed between DNA(SM) and the electrode manufacturer.

Material Elements

Mild Steel C. Mn. Si. P. S.

B quality up to12mm

C. Mn. Si. Cr. Ni. Mo. P. S.

B quality over12mm

C. Mn. Si. Cr. Ni. Mo. P. S.

UXW, QT28, QT35,QIN and HY80

C. Mn. Si. Ni. Mo. V. S. P. Cu. Cr.

TABLE 2.1

c. The sulphur and phosphorus content is not to exceed 0.05% each, except forthose consumables approved for QT35, QIN or HY80 where the sulphur andphosphorus content shall not exceed 0.03% each.


2.3

2.9 Welding Control Parameters (Welding Conditions Used in Tests)

a. Full details of the welding conditions used during production of all test piecesis to be forwarded to DNA(SM) NA 115, Foxhill, Bath, with the test results.TABLE 2.2, TABLE 2.3 and TABLE 2.4 show the requirements in tabulatedform. Where possible, electrode manufacturers are requested to follow theformat in reporting the welding conditions and extent of testing for the variousapproval groups. This information is to include:

(1) Process.

(2) Number of weld passes used to complete each joint.

(3) Size or diameter of electrode or wire.

(4) Type of gas or flux. (As required depending on process.)

(5) The nominal heat input for each weld pass is to be defined as:

AMPS (ARC) VOLTS 103SPEED OF TRAVEL (mmSec)

and expressed as kilojoules per millimetre (kJ/mm.)

(6) Nozzle from weld distance. (As required depending on process.)

(7) Method and degree of weaving used.

(8) Wire stick out. (As required depending on process.)

(9) Mode of metal transfer eg spray, dip or pulsed. (As required depending onprocess.)

(10) Preheat temperature.

(11) Interpass temperature.

(12) The electrode manufacturer shall also provide the following informationregarding test plates:

(a) Identification No

(b) Material

(c) Thickness

(d) Dimensional compliance with the relevant BS for edge preparation.Where such dimensions are at variance with the relevant BS thenthe actual dimensions shall be shown.

b. Approval of the consumable will normally be limited, at the discretion ofDNA(SM), NA 115, to use up to the maximum heat input equal to that usedduring tests. Where the welding conditions are considered unsuitable forproduction conditions, approval of the consumables will not normally begranted.


2.4

2.10 Fabricators Approval

a. Prior to the use of welding in production, fabricators are to meet the followingrequirements:

(1) Consumables are to be selected from the list in Annex D. and used strictlyin accordance with the approvals of that list.

(2) A satisfactory pre-production procedure test is to be completed inaccordance with NES 770 or NES 706.

(a) Test plates of butt welds are to be radiographed and are to meet theappropriate standards of NES 773.

(b) Test plates of both fillet welds and butt welds are to be visuallyexamined for weld shape and soundness andmeet the requirementsof NES 773.

(3) The welding procedure is to be agreed by the MOD Quality AssuranceRepresentative before production work is commenced.

b. The production use of consumables not listed in Annex D. or the use ofconsumables outside the conditions listed in Annex D. are to be subject toindividual approval between the fabricator and DNA(SM), NA 115.

c. Fabricators experienced in MOD(PE) SSC work may offer this experience asproof that they have established satisfactory welding procedures and that thetesting required by Clause 2.10a. need not be carried out. The acceptance ofsuch evidence will rest with the MOD Quality Assurance Representative. Nostructural welding is to be undertaken without awritten procedure based on theactual consumables selected for use.

d. When approval is sought to use a combination of consumables such as flux andwire for submerged arc welding whereby the flux and wire are produced bydifferent manufacturers, then the fabricator is responsible for the initialapproval tests and batch control tests.


2.5

see Annex C., Note d.(2)

TABLE 2.2 WELDING CONSUMABLE APPROVAL DATAMANUAL METAL ARC ELECTRODES


2.6

TABLE 2.3 WELDING CONSUMABLE APPROVAL DATASUBMERGED ARC


2.7

*= see Annex C., Note d.(2)TABLE 2.4 WELDING CONSUMABLE APPROVAL DATA

METAL INERT GAS


2.8


3.1

3. MANUAL METAL ARC ELECTRODESELECTRODE MANUFACTURERSAPPROVAL

3.1 Product Control Requirements

a. The following requirements of BS 639 are to apply:

(1) Classification.

(2) Size of electrode.

(3) Tolerance on dia of core wire.

(4) Covering.

(5) Packing and storage, except where specific arrangements have beenmadebetween electrode manufacturer and DNA(SM). These are shown inAnnex D.

(6) Marking.

(7) Manufacturers certificate; in addition the DNA(SM) approval is to bestated as shown in Annex D.

3.2 Test Requirements for all Classes of MMA Electrodes including HydrogenControlled Electrodes

a. Initial Approval. The following tests are to be carried out by the electrodemanufacturer to determine the weld metal properties. The welding parametersand conditions for consumables being submitted for approval in respect of QINtype steels are to be in accordance with NES 770.

(1) All-Weld Tensile Tests. Two all-weld tensile test specimens, one using4mm and one using 8mm or the largest electrode submitted for approvalare to be prepared and tested in accordance with BS 639, Appendix D1and D2.

(2) All-Weld Impact Test. Six Charpy V-notch impact test specimens, threeusing 4mm and three using 8mm or the largest size electrode submittedfor approval are to be prepared and tested in accordance with BS 639,Appendix D1 and D3.

(3) Chemical Analysis. Is to be taken from one of the all-weld metalspecimens prepared for the above tests.

(4) Transverse Bend Tests. Two bend tests, one with the face and the otherwith the root in tension shall be carried out for each welding position forwhich the electrode is classified by the electrode manufacturer. Themethod of preparation of the test pieces and test specimens and methodsof carrying out the tests are to be as defined in BS 639, Appendix E1 andE2 (see also Clause 2.6a.)

b. Periodic Check Tests. The following tests are to be done by the electrodemanufacturer to meet the requirements of Clause 2.4a. The welding conditionsshall be similar in all respects to those used for the initial approval tests, theseare to be fully reported with the results.

(1) All-weld tensile tests. In accordance with Clause 3.2a.(1)

(2) All-weld impact tests. In accordance with Clause 3.2a.(2)


3.2


4.1

4. SUBMERGED ARC WELDING CONSUMABLESELECTRODEMANUFACTURERS APPROVAL


a. The following requirements of BS 4165 are to apply:

(1) Definitions.

(2) Size of wire.

(3) Tolerance on diameter of wire (for bare wire only).

(4) Conditions of wire.

(5) Finish.

(6) Copper coating.

(7) Tensile strength.

(8) Coils.

(9) Coiling conditions.

(10) Flux, except that the mechanical properties of the welds are to be equatedto the requirements of this Standard.

(11) Packaging and storage, except where specific arrangements have beenmade between electrode manufacturer and DNA(SM) NA 115. These areshown in Annex D. hereof.

(12) Wire.

(13) Flux.

(14) Special conditions.

(15) Marking.

(16) Wire.

(17) Flux.

(18) Manufacturers certificate; in addition the DNA(SM) NA 115 approval isto be stated as shown in Annex D. hereof.

4.2 Test Requirements for Submerged Arc Wire and Flux Combinations

a. The wire and flux combination for which approval is required will for thepurpose of Clauses 4.3a. to 4.4c. be termed the consumables. The weldingparameters and conditions for combinations being submitted for approval inrespect of QIN type steels are to be in accordance with NES 770.

4.3 Initial Approval

a. The following tests are to be carried out by the electrode manufacturer todetermine the weld metal properties. Where approval is required for aparticular flux in combination with more than one flux, separate tests are to becarried out for each combination.


4.2

4.4 Multi-Run Technique All-Weld Metal

a. All-weld tensile tests. Two all-weld tensile test specimens, one using thesmallest and one using the largest wire submitted for approval, are to beprepared and tested in accordance with BS 4165 Appendix C1 and C2.

b. All-weld impact test. Six Charpy V-notch impact test specimens, three usingthe smallest and three using the largest size wire submitted for approval, areto be prepared and tested in accordance with BS 4165 Appendix C1 and C3.

c. Chemical analysis. Is to be taken from one of the all-weld metal specimensprepared for the above tests.

4.5 Multi-Run Technique V-Butt Test

a. Transverse bend tests. Four transverse bend test specimens, two using thesmallest and two using the largest size wire submitted for approval, are to betested. The method of preparation of the test pieces and test specimens andmethods of carrying out the tests are to be as defined in BS 4165 Appendix D1and D3 (see also Clause 2.6a.).

4.6 Square Edge Two Run Technique

a. Square edge butt weld test.Where approval is required for two run squareedge preparation the following tests, in addition to those contained in Clauses4.3a. to 4.5a., arc to be carried out. The object of these tests is to establish themaximum material thickness that can be welded with the two run SQUAREEDGE technique and still attain the required mechanical properties.

b. Square edge butt weld tests are to be prepared and tested in accordance withBS 4165 Appendix E1, E3, E4 and E5 only, subject to the exceptions statedbelow:

(1) BS 4165 Appendix E1. Methods of preparing test pieces and testspecimen. The material used for the test panels are to be in accordancewith Clause 2.6a. The MATERIAL THICKNESS is to be determined bythe electrode manufacturer as being the maximum thickness suitable forthe technique for the particular wire size involved. The longitudinal weldtensile test is not required.

(2) BS 4165 Appendix E3. Impact tests. Six Charpy V-notch impactspecimens are to be tested, three using 3.2mm or less diameter wire andthree using the largest size of wire submitted for approval. Where thethickness of the base material is less than that necessary for thepreparation of standard size Charpy specimens then, assuming all otherrelevant requirements of this specification are met:

(a) the consumable may be approved for multi-run welding only, or

(b) square edge two run approval may be given but a maximumthickness limit will be imposed.

(3) The alternatives (a) or (b)will be at the discretion of DNA(SM) and will bebased on the results of the other tests contained in Clauses 4.3a. to 4.6c.

(4) BS 4165 Appendix E5. Transverse bend tests. Four test specimens areto be bent through an angle of 180 . Two using 3.2mm or less diameterwire and two using the largest size of wire submitted for approval.


4.3

c. The test plates prepared for the tests contained in Clause 4.6a. are to beradiographed and subject tomacro-examination to ensure weld soundness, beadalignment and full penetration.


a. The following tests are to be carried out by the electrode manufacturer to meetthe requirements of Clause 2.4a. The welding conditions are to be similar in allrespects to those used for the initial approval tests and are to be fully reportedwith the results.

(1) All-weld tensile tests. Two all-weld tensile test specimens are to beprepared and tested in accordance with Clause 4.4a.

(2) All-weld impact tests. Six Charpy V-notch test specimens are to beprepared and tested in accordance with Clause 4.4b.


4.4


5.1

5. MIG WELDING CONSUMABLESELECTRODE MANUFACTURERSAPPROVAL


a. The following requirements of BS 2901 Part 1, are to apply:

(1) Diameters and tolerances.

(2) Condition of rods and wires.

(3) Reels of wire.

(4) Reeling conditions.

(5) Packing, except where specific arrangements have been made betweenelectrode manufacturer and DNA(SM). These will be shown in Annex D.hereof.

(6) Marking.

(7) Suppliers certificate; in addition the DNA(SM) approval is to be stated asshown in Annex D. hereof.

5.2 Test Requirements for MIG Wire/Gas Combinations

a. The physical test requirements of this section are referenced to:

BS 4165Submerged arc welding

BS 639Covered electrodes for manual metal arc welding.

b. Where approval is required for a wire in combination with a particular gas orgas mixture or more than one gas or gas mixture, then separate tests are to becarried out for each combination. Separate tests are to be carried out for eachwire submitted for approval and where specified herein for each mode of metaltransfer, eg spray, dip or pulsed.

5.3 Initial Approval

a. The following tests are to be done by the electrode manufacturer to determinethe weld metal properties, the welding parameters and conditions forcombinations being submitted for approval in respect of QIN type steels are tobe in accordance with NES 770.

5.4 Multi-Run Technique All-Weld Metal

a. All-weld tensile test. One all-weld tensile test specimen, using the largest ofthe wire sizes submitted for approval, are to be prepared and tested inaccordance with BS 639 Appendix D1 and D2.

b. All-weld impact test. Three Charpy V-notch impact test specimens, using thelargest size wire submitted for approval, are to be prepared and tested inaccordance with BS 639 Appendix D1 and D3.

c. Chemical analysis. Is to be taken from one of the all-weld metal specimensprepared for the above tests.

5.5 Multi-Run Technique V-Butt Test

a. The physical preparation of the test pieces, from which the test specimensrequired by the tests in Clauses 5.5d. and 5.5e. are made, are to follow therequirements of BS 639 Appendix D except that the weld panels are to beincreased in length sufficiently to enable production of three Charpy V-notchspecimens (see also Clause 0311).


5.2

b. The smallest and largest size wire submitted for approval are to be combinedin the joint, at the root and outer layers respectively. A sealing run is to beapplied with the largest wire used and welded in the same position as the mainweld after back gouging the main weld to clean sound material.

c. Where approval is required for positional deposition which requires theadoption of dip transfer, then separate test panels are to be produced for eachposition for which approval is sought.

d. Transverse bend tests. Two bend tests, one with the face and one with theroot in tension, are to be taken from each panel. The tests are to be conductedin accordance with BS 639 Appendix E1 and E2 (see also Clause 2.6a.).

e. Impact tests. Three Charpy V-notch specimens are to be taken from eachpanel. The test specimens are to be cut with the longitudinal axes transverse tothe weld axis and is to be located within 1.6mm below the surface of the mainweld. The notch is to be positioned in the centre of the weld and is to be cut inthat face of the test specimen which is perpendicular to the surface of the plate.The specimen is then to be tested in accordance with BS EN100451.

5.6 Square Edge Two Run Technique

a. Square edge butt weld tests. Where approval is required for two run squareedge preparation the following tests, in addition to those contained in Clauses0605 to 5.5e., is to be carried out. The object of these tests is to establish themaximum material thickness that can be welded with the two run square edgetechnique, and still attain the required mechanical properties.

b. Square edge butt weld tests are to be prepared and tested in accordance withBS 4165 Appendix E1, E3, E4 and E5 only, subject to the following exceptions:

(1) BS 4165 Appendix E1. Methods of preparing test pieces and testspecimens. The material used for the test panels is to be in accordancewith Clause 2.6a. The MATERIAL THICKNESS is to be determined bythe electrode manufacturer as being the maximum thickness suitable forthe technique for the particular wire/gas combination involved. Separatetests are to be carried out for each size of wire for which approval isrequired. The longitudinal weld tensile test is not required.

(2) BS 4165 Appendix E3. Impact tests. Three Charpy V-notch specimensare to be tested for the largest size of wire for which approval is required.Where the thickness of the basematerial is less than thatnecessary for thepreparation of standard size Charpy specimen then, assuming all otherrelevant requirements of this specification are met:

(a) the wire/gas combination may be approved for multi-run weldingonly, or

(b) square edge two run approval may be given but a maximumthickness limit will be imposed.

The alternatives (a) or (b) will be at the discretion of DNA(SM) andwill be basedon the results of the other tests contained in Clauses 0604 to 0615.

(3) BS 4165 Appendix E5. Transverse bend tests. Two tests are to be donefor the largest size of wire submitted for approval. The specimens are tobe bent through 180 .

c. The test plates prepared for the tests contained in Clause 5.6b. are to beradiographed and subjected to macro-examination to ensure weld soundness,bead alignment and full penetration.


5.3


a. The following tests are to be carried out by the electrode manufacturer to meetthe requirements of Clause 2.4a. The welding conditions must be similar in allrespects to those used for the initial approval tests, these are to be fully reportedwith the results.

(1) All-weld tensile tests. One all-weld tensile test specimen is to beprepared and tested in accordance with Clause 5.4a.

(2) All-weld impact tests. Three Charpy V-notch test specimens are to beprepared and tested in accordance with Clause 5.4b.


5.4


6.1

6. CONSUMABLES FOR WELDING SUBMARINE STEELS

a. Electrode manufacturers seeking approval for consumables in respect ofsubmarine steels as defined in SCOPE 2. will, in addition to completing theelectrode manufacturers tests as detailed in this NES, will be requested toprovide the following information:

(1) A certificate for MMA consumables stating the moisture content thatrelates to 5ml of diffusible hydrogen per 100 grammes of deposited weldmetal.

(2) Baking and holding conditions for MMA consumables to achieve 5ml ofdiffusible hydrogen per 100 grammes of deposited weld metal.

(3) A diffusible hydrogen/time graph that will show the diffusible hydrogenper 100 grammes of deposited weld metal. The weld metal is to bedeposited at 1 hourly intervals over a period of five hours. Theconsumables are to have been baked in accordance with themanufacturers recommendations to achieve (1) above and removed fromholding ovens prior to commencement of welding.

Manufacturers may be requested by DNA(SM) to supply quantities ofconsumables or combinations of consumables to DRA Dunfermline. Theconsumables supplied will be subjected to special valuation and tests. In allthese tests the minimum and maximum values of heat input and interpasstemperatures will be used as appropriate to the steel and the weldingconsumables to determine the optimum parameters within which theconsumables may be used. To obtain approval the test results are to meet therequirements given in Annex C. and satisfy the special evaluation and testsdetailed in Clause 6.b.

b. Special Evaluation and Tests:

NOTE: Test panel material is to be the same as that to be used in production.

TEST 1 Usability and all positional weld metal properties.

Before proceeding with full assessment tests of a consumable, initial testsare to be carried out by using scrap material to determine the usability ofthe consumable in all positions, followed by welded panels in 38mm thickplate of the relevant steel, with double vee preparation and a minimumlength of 305mm.

Charpy and Hounsfield tensile specimens will be taken from the panels.Two panels are to be welded in each of the following positions, one withminimum heat input and one with maximum heat input to determineoptimum heat input.

c. Flat.

d. Inclined overhead 45 .

If test results coincide with manufacturers claims, Tests 2 to 9 will becarried out.

TEST 2 Moisture content of coating for each gauge of MMA electrode and forsubmerged arc flux is to be determined in the following conditions:

e. As received.

f. After baking for 2 hours at 400 C to 475 C.


6.2

TEST 3 Naval Research Laboratory (NRL) weld root run cracking test.Cracking/no cracking temperatures to be established in 38mm NRLspecimens of the relevant steel.

TEST 4 Mechanical properties. Weld two panels in the following positions:vertical, overhead, and inclined overhead 45 . Size of test panels to be38mm thick, 455mm 230mm with double vee preparation. Flush weldsand from each panel take:

g. Four Hounsfield specimens.

h. Two sets of three Charpy specimens.

i. Three side bend specimens.

TEST 5 Allweldmetal properties. Weld twopanels in25mm thick plate with singlevee preparation and backing bar for Charpy specimens and two BS 18gauge length tensiles.

j. As welded.

k. Stress relieved.

TEST 6 Weld pad analysis. Weld deposit 16mm square 50mm long to be madeon a mild steel base (75mm 50mm 6mm). Sample for analysis is tobe taken so that no metal is removed from within 7mm of bottom of pad.

TEST 7 Crack starter bulge explosion panels. Weld three panels, two in the flatand one in the inclined overhead position, in 38mm thick plate,915mm 610mm, with double vee preparation. Flush welds and fromeach panel take:

l. Crack starter bulge explosion specimen.

m. Four Hounsfield specimens.

n. Two sets of three Charpy specimens.

o. Three side bend specimens.

TEST 8 Plain bulge explosion panels. Weld three panels, two in the flat and onein the inclined overhead positions, in 38mm thick plate,915mm 610mm, with double vee preparation. Flush welds and fromeach panel take:

p. Plain bulge specimen.

q. Four Hounsfield specimens.

r. Two sets of three Charpy specimens.

s. Three side bend specimens.

TEST 9 Dropweight nil ductility transition (NDT) temperature.

Weld one panel in 38mm thick plate, 915mm 610mm with double veepreparation, in flat position. Flush weld and from the panel take:

t. Six dropweight specimens.


6.3

u. Four Hounsfield specimens.

v. Two sets of three Charpy specimens.

w. Three side bend specimens.

x. In each of the above tests each panel will be welded by a different welder exceptin Test 5 where the all-weld metal (AWM) specimens will be welded by the samewelder.

y. For assessing wire consumables the above tests will be carried out using sprayand pulsed arc MIG. In the submerged arc process positional welds are notinvolved and only those tests involving welding in the flat position will becarried out.

z. All side bend specimens will be bent through an angle of 180 over a former fourtimes the thickness of the specimen.

aa. Crack starter bulge explosion panels are to be given two shots and the plainbulge explosion panels are to be given sufficient shots to reach the bulge limitwith sufficient reduction of thickness.

6.1 Batch Control

a. Consumables approved for use on the submarine steels defined inSCOPE 2., areto be subject to batch control tests which is to be carried out on each batchwhichforms part of the whole of a consignment of consumables. The results of thesetests are to be supplied by the electrode manufacturer or fabricator (see Clause2.10d.) to the consignee and DNA(SM) NA 115, Foxhill, Bath, prior to deliveryof the consignment.

6.2 Patch Definitions

a. For the purpose of Clause 6.1a. the following definitions define a batch ofconsumables:

(1) Manual metal arc electrodes. A batch is to consist of that finishedquantity of electrodes of the same size, made from the same dry mixcoating constituents and core wire, produced in a continuous productionoperation. A change in any of these variables will constitute a change inbatch.

(2) Submerged arc consumables:

(a) Flux. A batch is to consist of that finished quantity of flux of thesame type, made from the same dry mix, produced in a continuousproduction operation. A change in any of these variables willconstitute a change in batch.

(b) Solid bare wire. A batch is to consist of that finished quantity ofwire of the same type, same size and made from the same cast,produced in a continuous production operation. A change in any ofthese variables will constitute a change in batch.

(c) Cored or coated electrode. A batch is to consist of that finishedquantity of electrode of the same type, same size andmade from thesame cast (for core wire, fabricated strip tube or ancillary wires)produced in a continuous production operation with flux or coatingwhich is used from the same dry mix. A change in any of thesevariables will constitute a change in batch.


6.4

(3) MIG wires:

(a) Solid bare wire. A batch is to consist of that finished quantity ofwire of the same type, same size and made from the same cast,produced in a continuous production operation. A change in any ofthese variables will constitute a change in batch.

(b) Cored or coated electrode. A batch is to consist of that finishedquantity of electrode of the same type, same size andmade from thesame cast (for core wire, fabricated strip tube or ancillary wires)produced in a continuous production operation with flux or coatingwill constitute a change in batch.

b. Each batch is to be identified by a separate batch number.

6.3 Batch Control Tests

a. Manual Metal Arc Consumables. The following tests are to be carried outfor consumables for use on the submarine steels defined in SCOPE 2.

(1) All-weld tensile tests. One all-weld tensile test is to be prepared andtested in accordance with Clause 3.2a., except that separate tests are tobe carried out for each size of electrode.

(2) All-weld impact tests. Three Charpy V-notch impact test specimens areto be prepared and tested in accordance with Clause 3.2a., except thatseparate tests are to be carried out for each size of electrode.

(3) Chemical analysis. Is to be taken from one of the all-weld metalspecimens prepared for the above tests.

b. Submerged Arc Consumables. The following tests are to be carried out forwires and flux combinations for use on the submarine steels defined inSCOPE 2.

(1) All-weld tensile tests. One all-weld tensile test is to be prepared andtested in accordance with Clause 4.4a., except that separate tests are tobe carried out for each size of wire.

(2) All-weld impact test. Three Charpy V-notch impact test specimens areto be prepared and tested in accordance with Clause 4.4b., except thatseparate tests are to be carried out for each size of wire.

(3) Chemical analysis. Is to be taken from the all-weld metal specimenprepared for the above tests.

c. Metal Inert Gas Consumables. The following tests are to be carried out forwire/gas combinations for use on the submarine steels defined in SCOPE 2.

(1) All-weld tensile tests. One all-weld tensile test is to be prepared andtested in accordance with Clause 5.4a., except that separate tests are tobe carried out for each size of wire.

(2) All-weld impact tests. Three Charpy V-notch impact test specimens areto be prepared and tested in accordance with Clause 5.4b., except thatseparate tests are to be carried out for each size of wire.

(3) Chemical analysis. Is to be taken from all-weld metal specimensprepared for the above tests.


A.1 ANNEX A.

ANNEX A.

RELATED DOCUMENTS

A.1 The following documents are referred to in this NES:

See Clause

BS EN 100021 Methods for tensile testing of materials 6.b.

BS EN 100451 Part 2: Charpy V-notch impact test onmetals

5.5e.

BS 639 Specification for covered carbonmanganese steel electrodes for manualmetal arc welding

2.2a., 3.1a.,3.2a., 5.2a.,5.4a., 5.4b.,5.5a., 5.5d.Annex C.

BS 2901 Part 1: Filler rods and wires for gasshielded arc weldingFerritic Steels

5.1a.

BS 4165 Specification for electrode wires andfluxes for the submerged arc welding ofcarbon steel and medium tensile steel

4.1a., 4.4a.,4.4b., 4.5a.,4.6b., 5.2a.,5.4c., 5.6b.

NES 706 Welding and fabrication of ship structure 2.10a.

NES 770 Welding and fabrication QIN HY80, andQT35 steelsPart 1: GeneralPart 2: Approval of Welding Proceduresfor Submarine Construction

2.10a., 3.2a.,4.2a., 5.3a.,Annex C.,Annex D.,List 1, Sheet 6,List 2, Sheet 4,List 4, Sheet 4,List 6, Sheet 1

*NES 773(DG Ships/G/10000)

Minimum acceptance standards forwelded joints in HM Ships andSubmarines

2.10a.

DG Ships 8081 Carbon steel castings Annex D.,List 1, Sheet 3

ADSPEC 1100 General Carbon Steel Forgings Annex D.,List 1, Sheet 3,4, 6 and 7

* Not yet published


A.2ANNEX A.


B.1 ANNEX B.

ANNEX B.

DEFINITIONS AND ABBREVIATIONS

B.1 There are no Definitions and Abbreviations for this NES.


B.2ANNEX B.

NES769

Issue4(Reform

atted)

C.1

ANNEXC.

ANNEXC.

WELDMETALMECHANICALPROPERTIESANDTEST

PANELREQUIREMENTS


C.2ANNEX C.

NOTES TO ANNEX C.

Note a. Tensile Testing Acceptance/Rejection

The average of the yield strength values of the multi-run welds and theyield strength value of the all weld metal specimen are to be within therange specified in Annex C.

Note b. Charpy Testing Acceptance/Rejection

If the average of the three impact values for either or both sets ofspecimens fails to comply with the specified minimum requirement, threeadditional specimens from each set may be prepared and tested. Theresults may be added to those previously obtained to form a new averagewhich is to comply with the minimum value specified in table or the testwill be deemed a failure.

Note c. BEND TESTING ACCEPTANCE/REJECTION

(1) Manual metal arc welds. The test specimen is to be bent through anangle of 180 over a former having a diameter equal to three times thethickness of the specimen for mild steel approval and four times thethickness of the specimen for higher strength approval.

(2) MIG and submerged act welds. The test specimens are to be bentthrough an angle of 120 over a former having a diameter equal to threetimes the thickness of the specimen for mild steel approval and four timesthe thickness for higher strength approvals. For QIN steels the specimensare to be bent through an angle of 180 .

(3) The consumables comply with the test if, on completion no crack or defecton the outer surface of the specimen is greater than 3mmmeasured acrossthe test specimen of 1.6mm measured along the length of the testspecimen. Premature failure at corners of the test specimen will not because for rejection.

Note d. V BUTT MULTI-RUN PANELS POSITIONS

(1) Panels are to be welded for each welding position for which theconsumable is classified by the electrode manufacturer except that whenthe electrode is classified for welding in the flat position only, two arerequired, and that when the consumable is classified forhorizontal-vertical and vertical positions, a test in the horizontal-verticalposition will not be required. (See BS 639, Appendix E, Table 6 for MMA).

(2) The test panel for the vertical position is to be welded using the upwardmethod unless the manufacturer specifically recommends that only thedownward method is to be used. If both methods are recommended, testpanels welded by each method are to be used.

Note e. QIN and HY80 Acceptance

The properties quoted are for consumables approved for QIN and HY80welds in submarines refits excluding TSSBN, SSK and SSN17 onwards.For all QIN andHY80welds in new construction welds category 1, 2, 3 and4 (NES 770) and in submarine refits other than above the followingminimum properties are required: Yield 550N/mm2with 20% elongationand Charpy values of 50 joules at 50 .


D.1 ANNEX D.

ANNEX D.

MOD(PE) SSC APPROVED WELDING CONSUMABLES

D.1 This Annex lists the welding consumables currently approved for use withMOD(PE)structural steels.

D.2 Selection ofwelding consumables for use on forgings, castings, and the obsolete steels,which are not shown in this Annex, shall be in accordance with the following exceptthat the welding of S, SU, D, D1 and DW quality steels shall be limited to the manualmetal arc welding process.

APPROVAL GROUPS AS SHOWN IN ANNEX D.

MS up to25mm

B and BXquality up to12mm or MSup to 25mm

B and BXquality Over12mm or MSover 25mm

QT28 QIN &HY80

HYDROGEN CONTROLLEDONLY

OBSOLETESTEELS

QT35SSUDWAD & D1

Up to 12mmUp to 12mmUp to 12mmUp to 12mm

Over 12mmOver 12mmOver 12mmOver 12mmUp to 12mm

AnyThick-ness

FORGINGS

ADSPEC 1100Class IClass IIClass III

Class IV

Any thicknessAny thickness

AnyThick-ness

AnyThick-ness

CASTINGS

DG SHIPS 8081Generalpurpose

Any thickness

D.3 For materials not covered by the above, or for dissimilar metal combinations orcladding applications, only those welding consumables contained in approved weldprocedures or other directive or as advised by DNA(SM) are to be used.

D.4 Heat input ranges ormaximum values have been shown for each welding consumable.Welding parameters are to aim at approaching, but not exceeding, the maximumvalues shown.


D.2ANNEX D.

LIST 1SHEET 1


PROCESS MANUAL METAL ARC (MMA)

MATERIAL Mild Steel up to and including 25mm thickness

APPROVALS

MANUFACTURER andElectrode Name

Electrodesize(mm)

WeldingPosition

Heat InputkJ/mm

REMARKS

Min MaxPosition kJ/mm

MUREX WELDINGPRODUCTS LTDCeltian 3.25 5.0 FHOVD

ESAB LtdOK Femax 180ROK SilkmatOK VersimatOK Versitrude 46.58

3.253.253.253.25

5.06.06.06.0

FHfFHVOFHVOFHVO Current values to

PHILIPS ELECTRICARC WELDING LTDPhilips 68Philips 48GPhilips C23SPhilips C23X

2.53.253.25

5.06.06.05.0

FVdFHVOFHfFHf

be in accordancewith themanufacturersrecommendations.Electrodes to beused at a naturalburn off rate

ORLIKON LTDFincordFincord MSupercord

1.62.02.0

4.06.05.0

FHfFHVOVD

burn off ratewithout excessiveweaving.

WELDING RODS LTDWRX 60WRX 21WRX 6013

3.253.253.25

6.06.06.0

FHVOFHVOFHVO

FormerleySmoothway


D.3 ANNEX D.

LIST 1SHEET 2

MOD(PE) APPROVED WELDING CONSUMABLES


MATERIAL B & BX Quality up to 12mm thickness and MildSteel up to and including 25mm thickness. Obsolete SteelsS SU, DW and A Quality Steels up to 12mm thickness

APPROVALS


Electrodesize(mm)

WeldingPosition

Heat InputkJ/mm

REMARKS


MUREX WELDINGPRODUCTS LTDFerromaxFastex 5Ferrolux 7024VodexVortic MarineZodian MarineSpeedexFerrex Universal

3.253.253.253.253.253.253.253.25

6.06.06.06.06.06.06.06.0

FHVOFHVOFHVOFHVOFHVOFHVOFHFHVO Current values to

be in accordanceESAB LtdOK Mildtrode 46.00OK Unitrode

3.253.25

6.06.0

FHVOFHVO

be in accordancewith themanufacturersrecommendations.

LINCOLN ELECTRICLTDNormend TV117Vertend

3.253.253.25

6.36.06.0

FHVOFHVOFHVO

recommendations.Electrodes to beused at Heatinput 3.0kJmmmax.

PHILIPSELECTRICAL ARCWELDING LTD45G45G4878

3.253.253.253.25

6.36.36.06.0

FHVOFHVOFHVOFHVO


D.4ANNEX D.

LIST 1SHEET 2 continued



MATERIAL B & BX Quality up to 12mm thickness and MildSteel up to and including 25mm thickness. Obsolete SteelsS SU, DW and A Quality Steels up to 12mm thickness

APPROVALS


Electrodesize(mm)

WeldingPosition

Heat InputkJ/mm

REMARKS


WELDING RODS LTDEasywayFerrod 2Autoferrod 3Ferrod 3WRX 25MWRX 30WRX 40Ferrod 170WRX 50WRX 45WRX 70

3.253.254.003.253.253.253.253.253.253.25

6.06.06.06.06.06.06.06.06.05.0

FHVOFFFHVFHVOFHVOFhfFHVOFHVOVd

Current values tobe in accordancewith themanufacturersrecommendations.Electrodes to beused at a naturalburn-off ratewithout excessiveweaving.

OERLIKONWELDING LTDFabacito 7028

weaving.Heat input not toexceed 3.0kJ/mm.


D.5 ANNEX D.

LIST 1SHEET 3


PROCESS MANUAL METAL ARCHydrogen Controlled only.

MATERIAL Forgings to ADSPEC 1100 Classes 1 and 11. GeneralPurpose Castings to DGS 8081.

B and BX Quality over 12mm thickness andMild Steel over 25mm thickness.Obsolete Steels S, SU, DW and Quality over 12mm thickness

APPROVALS


Electrodesize(mm)

WeldingPosition

Heat InputkJ/mm

REMARKS


MUREX WELDINGPRODUCTS LTDCrestexFortex 7018Ferex 7018LTFerex 7016Ferex STF

3.253.253.253.252.5

5.06.06.06.06.0

FVDFVHOFVHOFHVOFHVO

ESAB LTDOK Hytrode 70161OK Unitrode 48.04OK Unitrode 7018LTOK Hytrode 70162

2.52.52.52.5

5.06.06.06.0

FHVOFHfFHVOFHV

Current values tobe in accordancewith themanufacturers

PHILIPSELECTRICAL ARCWELDING LTDPhilips 36GPhilips C16Philips 27Philips 55GPhilips 56S

3.253.253.253.253.25

6.36.05.06.06.0

FHVOFHFVDFHVOFHVO

manufacturer srecommendations.Electrodes to beused at a naturalburn-off ratewithout excessiveweaving.Heat input1.0/2.5kJmm.

WELDING RODS LTDLF 40LOWHYDROD No 2WRX 7016WR LF51

3.253.252.53.25

6.06.06.05.0

FHVOFHVOFHVOFVD

LINCOLN ELECTRICLTDUltraweld 70 2.5 6.0 FHV


D.6ANNEX D.

LIST 1SHEET 4


PROCESS MANUAL METAL ARCHydrogen Controlled only. Allelectrodes are to be supplied in sealed (Non Vacuum)containers.

MATERIAL QT 28.Forgings to ADSPEC 1100 Class III

APPROVALS


Electrodesize(mm)

WeldingPosition

Heat InputkJ/mm

REMARKS


MUREX WELDINGPRODUCTS LTDFortex B 3.25 6.0 FHVO

Current values tobe in accordancewith themanufacturersrecommendations.Electrodes to be

Batch testcertificaterequired.Notsuitable toStressRelief

B t h t tESAB LTDTensitrode 55 3.25 6.0 FHVO

Electrodes to beused at a naturalburn-off rate

Batch testcertificaterequiredwithout excessive

weaving.Heat input1.18/2.17kJ/mmmax.

required


D.7 ANNEX D.

LIST 1SHEET 5


PROCESS MANUAL METAL ARCHydrogen Controlled only.

MATERIAL UXW and Fillet Welds of UXW frames to QT 28 pressurehull

APPROVALS


Electrodesize(mm)

WeldingPosition

Heat InputkJ/mm

REMARKS


MUREX WELDINGPRODUCTS LTDFerex 7018LT 3.25 6.0 FHVO

Current values tobe in accordancewith themanufacturers

Batch testcertificaterequired.manufacturer s

recommendations.Electrodes to beused at a naturalburn-off ratewithout excessiveweaving.Heat input1.18/2.17KJ/mm.


D.8ANNEX D.

LIST 1SHEET 6


PROCESS MANUAL METAL ARCHydrogen Controlled only. Allelectrodes shall be supplied in sealed (Non Vacuum)containers.

MATERIAL QIN and HY80. Forgings to ADSPEC 1100 Class IVObsolete Steel QT35.

APPROVAL (A) New construction weld categories 1,2,3 and 4 (NES 770)(B) Submarine refits.

APPROVALS


Electrodesize(mm)

WeldingPosition

Heat InputkJ/mm

REMARKS


MUREX WELDINGPRODUCTS LTD

FORTREX NQ1(9016 Type)

3.25 5.0 FHVO 1.8/2.8

3.25mmdiam to beused forroot runsonly. Canbe used oncastingswithPWHT

BABCOCK WELDINGPRODUCTS LTD

Babcock 11018

Babcock 9018 (QIN)

3.25

3.25

5.0

4.0

FV

FHVO

F = 2.5V = 2.13

1.2/2.07

METRODE WELDINGPRODUCTS LTD

3NICR MOB 3.25 5.0 F 1.32.5 For use oncastings,extruded orrolledframesprior toquench andtempercycle iscarried out

LINCOLN WELD ROLTD

Lincoln Weld Ro(9106 Type)

3.25 5.0 FHVO 1.16/2.7


D.9 ANNEX D.

LIST 1SHEET 7


PROCESS MANUAL METAL ARCHydrogen Controlled only. Allelectrodes shall be supplied in sealed (Non Vacuum)containers.

MATERIAL QIN and HY80. Forgings to ADSPEC 1100 Class IVObsolete Steel QT35.

APPROVAL Submarine refits ex. TSSBN, SSK, SSN17 onwards

APPROVALS


Electrodesize(mm)

WeldingPosition

Heat InputkJ/mm

REMARKS


PHILIPSELECTRICAL ARCWELDING LTD

Philips 108 (DutchManufacture)

Philips 118 (DutchManufacture)

3.25

3.25

6.0

6.0

FHVO

FHVO

OERLIKONWELDING LTD

Tenacito 11018M 4.0 FHVO

BABCOCK WELDINGPRODUCTS LTD

Babcock 11018 3.25 5.0 FV F = 2.5V = 2.13

METRODEPRODUCTS LTD

11018M 4.0 5.0 FHVO


D.10ANNEX D.

LIST 2SHEET 1


PROCESS SUBMERGED ARC

APPROVAL MULTIPASS AND FILLED WELDSLIMIT

MATERIAL MILD STEEL UP TO AND INCLUDING 25mm MAXTHICKNESS

MANUFACTURER andAPPROVALS

MANUFACTURER andWire/Flux Names Wire size Welding Heat Input REMARKSWire/Flux Names Wire size

mmWeldingPosition

Heat InputkJ/mm


Bostrand S2/Muraflex A50

Bostrand S4/Muraflux A50Muraflux A80BX 200Satinarc

Bostrand S1/Satinarc BX10

Bostrand S2/Muraflux 1009

2.43.24.05.0

2.43.24.05.0

2.43.24.05.0

5.0

FHfFHfFHfFHf

FHf

FHf

FHf

Current values tobe in accordancewith themanufacturersrecommendations


D.11 ANNEX D.

LIST 2SHEET 2


PROCESS Submerged arc

MATERIAL Multi-pass and fillet welds

APPROVAL B Quality 12mm thickness max, and Mild Steel up to andincluding 25mm Max thickness, etc



mmWeldingPosition

Heat InputkJ/mm


Bostrand S2/Satinarc BX 200 2.4

3.24.05.0

FHfFHfFHfFHf

Current values tobe in accordancewith themanufacturersrecommendations.Heat Input0.3kJ/mm max.


D.12ANNEX D.

LIST 2SHEET 3


PROCESS Submerged Arc

APPROVED Multipass and fillet weldsLIMIT

MATERIAL B and BX Quality over 12mm andMild Steel over 25mm



mmWeldingPosition

Heat InputkJ/mm


Bostrand WB3/Satinarc BX 300 3.2

4.0FHf

Bostrand S2/Satinarc BX 200

2.43.24.05.0

FHfFHfFHfFHf

Current values tobe in accordancewith themanufacturersmanufacturersrecommendations.Heat Input1.0/2.5kJ/mm.1.0/2.5kJ/mm.

ES AB LTDOK Autorod 53/OKFlux 10.71OK Autorod 53/OKFlux 10.62OK Autorod S2Si/OKFlux 10.71

2.55.02.5

2.5

FHf

FHf

FHf


D.13 ANNEX D.

LIST 2SHEET 4



APPROVAL QIN and HY80

MATERIAL Multipass and Filled Welds in:(A) New Construction welds categories 1, 2, 3 and 4(NES 770)(B) Submarine refits


MANUFACTURER andWire/Flux Name Wire size Welding Heat Input REMARKSWire/Flux Name Wire size

mmWeldingPosition

Heat InputkJ/mm

OERLIKONWELDING LTD

OES3 wireOP121TT flux

4.0 FHf1.2/2.2


D.14ANNEX D.

LIST 2SHEET 5



APPROVAL Multipass and Filled Welds in ex TSSBN, SSK, SSN17LIMIT onwards

MATERIAL QIN and HY80



mmWeldingPosition

Heat InputkJ/mm

OERLIKONWELDING LTD

OES3 NI MO1Wire OP41 TTFlux

4.0 FHf 1.2/2.2

1. ApprovalcoversGermanproducedwire only2. Currentnot toexceed 500amps

LINDE

Linde M188wire OP41TTflux

1.6 FHf 1.18/2.17

1.Fabricatorto supplybatch testcertificates2.DNA(SM)priorapprovalbeforebeing used.3. Heattreatmentnotpermitted4. Currentnot toexceed 500amps


D.15 ANNEX D.

LIST 3SHEET 1


PROCESS Submerged arc

APPROVAL Square edge two-run butt weldsLIMIT

MATERIAL B and BX quality and/or Mild Steel to thickness approvedbelow



mmWeldingPosition

Heat InputkJ/mm

ESAB LTDOK Autorod S3/OKFlux 10.71

2.5 12mm 2.5/3.3 550 Amps31 ArcVolts

MS only


D.16ANNEX D.

LIST 4SHEET 1


PROCESS Metal Arc inert gas shielded

APPROVAL Multi-pass and fillet weldsLIMIT

MATERIAL Mild Steel up to and including 25mm max

APPROVALSMANUFACTURERand Wire/Flux Name

Wiresize Arc Welding Heat Input

REMARKSand Wire/Flux Name sizemm

ArcMode

WeldingPosition

Heat InputkJ/mm


+Bostrand LW1/CO2*

Co-o-Mig 57/Argoshield 5Argoshield 20

Fusarc No 1/CO2*

0.81.01.21.21.6

1.61.62.02.45.0

DipDipSprayDipSpray

SprayDipSpraySprayspray

FHVOFHfFHfHVFHf

FHfHVOFHfFHfFHf


*Argoshield5 orArgoshield20 may beused in lieuof CO2

+ BostrandBW1(Uncoppered)may be usedin lieu0.8 to 1.2sizes only

LINCOLNELECTRIC LTD

C.3/CO2 1.21.21.61.6

SprayDipSprayDip

FHfHVFHfFV



D.17 ANNEX D.

LIST 4SHEET 2


PROCESS Metal-arc inert gas shielded


MATERIAL B quality up to 12mm thickness max and Mild Steel up to25mm

MANUFACTURERAPPROVALS

MANUFACTURERand Wire Name/Gas

ShieldWiresize Arc Welding Heat Input kJ/mm

REMARKSShield size

mm

ArcMode

WeldingPosition Heat Input kJ/mm


JOHN PRING ANDSON LTD

Golring/CO2 1.01.01.21.21.6

SprayDipSprayDipSpray

FHfHVOFHfHVOFHf

Also knownas Migmaster


Bostrand LW1/CO2*+

0.81.01.21.21.6

DipDipSprayDipSpray

FHVOFHVOFHVOFHVOFHVO

Current values tobe in accordancewith themanufacturersrecommendations.Heat Input3 0kJ/mm max

+ BW1(Uncoppered)May be usedin lieu0.81.2 sizes

NATIONALSTANDARD COLTDNS118 CopperFree/CO2*

or Argoshield 5

0.80.81.01.01.21.6

SprayDipSprayDipSpraySpray

FHfHVFHfHVFHfFHf

3.0kJ/mm max.

OERLIKONWELDING LTDFluxofil 31/Argoshield 20

1.22.4

SpraySpray

FHfFHf


D.18ANNEX D.

LIST 4SHEET 3


PROCESS Metal-arc inert gas shielded


MATERIAL B and BX quality over 12mm and Mild Steel over 25mmthickness


D.19 ANNEX D.




REMARKSShield size

mm

ArcMode



+Bostrand LW1/Argoshield 5

+Bostrand LW1/Argoshield 20

Cor-o-fil B.55/Argoshield 20

Cor-o-fil B.55/CO2*

1.21.6

1.2

1.62.4

1.62.43.2

SpraySpray

Spray

SpraySpray

DipSpraySpray

FHfFHf

FHf

FHfFHf

HVFHfFHf


+BW1(Uncoppered)May be usedin lieu ofLW1 0.81.2sizes.

ESAB LTD

OK Autorod12.51/CO2*

0.80.81.01.01.21.2

DipSprayDipSprayDipDip

FHVOFHfFHVOFHfFHfFHf

Current values tobe in accordancewith the

GREENGROVEWELDING WIRESLTD

GL14/CO2

0.80.80.90.91.01.01.21.2

DipSprayDipSprayDipSprayDipSpray

FHeVFHfFHfVFHfFHfVFHfFVFH

with themanufacturersrecommendations.Heat Input1.0/2.5kJ/mm

PHILIPSELECTRICAL ARCWELDING LTDPZ 6000/CO2

PZ 6008/CO2

0.80.91.01.01.21.21.61.21.6

DipDipSprayDipSprayDipSpraySpraySpray

HVHVFHfHVFHfHVFHfFHfFHf

LINCOLNELECTRIC LTDC2/CO2*

0.80.81.01.01.21.2

DipSprayDipSprayDipSpray

FHVOFHfFHVOFHfFHfFHf


D.20ANNEX D.

LIST 4SHEET 4


PROCESS GAS SHIELDED METAL ARCSOLID WIRES

APPROVAL Mulitpass and fillet welds inLIMIT (A) New construction weld categories 1, 2, 3 and 4

(NES 770) (B) Submarine refits





REMARKSShield size

mm

ArcMode


LINDE

Linde 95 wire,Argon 95%CO2 gas

1.2 pulsed FHVO 2.9/3.5


D.21 ANNEX D.

LIST 4SHEET 5


PROCESS GAS SHIELD METAL ARCSOLID WIRES

APPROVAL Multipass and fillet welds for submarine refits exLIMIT TSSBN, SSK, SSN17 onwards



MANUFACTURERand Wire

Name/Gas shieldWiresize Arc Welding Heat Input

REMARKSName/Gas shield size

mm

ArcMode

WeldingPosition

Heat InputkJ/mm

LINDE

Linde 95 wire,Argon 98%,Oxygen 2% gas

1.2

1.6

Pulsedwithsynergiccontrol

Spray

FHVO

FHf

2.9/3.5

1.18/2.17

Use confinedto GECAWPmachine.

US WELDINGWIRE

ER100S1 wireArgon 98%Oxygen 2% gas

1.2

1.6

Pulsed

Spray

V

F

2.2

2.2


D.22ANNEX D.

LIST 5SHEET 1


PROCESS Self-ShieldedArc Process


MATERIAL B quality up to and including 12mm thickness max andMild Steel up to and including 25mm max thickness.

APPROVALSMANUFACTURERand Wire Name

Wiresize Welding Heat Input kJ/mm

REMARKSand Wire Name sizemm

WeldingPosition

Heat Input kJ/mmmax

Current values to bein accordance withthe manufacturersrecommendations.


D.23 ANNEX D.

LIST 5SHEET 2


PROCESS Self-ShieldedArc Process


MATERIAL B and BX quality over 12mm thick and Mild Steel over25mm thick.

APPROVALSMANUFACTURERand Wire Name

Wiresize Welding Heat Input kJ/mm

REMARKSand Wire Name sizemm

WeldingPosition

Heat Input kJ/mmmax


Seamac 5.0 FHf 1.0/2.5

Current values to bein accordance withthe manufacturersrecommendations.


D.24ANNEX D.

LIST 6SHEET 1


PROCESS GAS SHIELDED METAL ARCCORED WIRE

APPROVAL Multi-pass and fillet welds inLIMIT (A) New Construction weld categories 1, 2, 3 and 4

(NES 770)(B) Submarine refits



MANUFACTURERWire Name/Gas

ShieldWiresize Arc Welding Heat Input

REMARKSShield size

mm

ArcMode

WeldingPosition

Heat InputkJ/mm

ALLOY RODS LTD

Dual Shield II101 TM wire,Argon 95%, CO25% gas (semiautomatic)

Dual Shield II101TM wireArgon 95%, CO25% gas(Mechanized)

1.2

1.2

Spray

Spray

FHVO

FHf

2.0/2.7

3.8/4.5

MUREXWELDINGPRODUCTS LTD

Corofil NQ1wire Argon 95%,CO2 gas

B65 wireArgon 95%, CO25% gas

1.2

1.6

Spray

Spray

FHVO

FHV


D.25 ANNEX D.

LIST 6SHEET 2


PROCESS GAS SHIELDED METAL ARCCORED WIRE

APPROVAL Multipass and fillet welds for submarine refits ex TSSBN,LIMIT SSK SSN17 onwards



MANUFACTURERWire Name/Gas

ShieldWiresize Arc Welding Heat Input

REMARKSShield size

mm

ArcMode

WeldingPosition

Heat InputkJ/mm

ALLOY RODS LTD

Dual Shield II-101 TM wire,Argon95%, CO25% gas electrodepositive)

1.6

1.2

Spray

Spray

F

V

2.2

2.2


D.26ANNEX D.


E.1 ANNEX E.

ANNEX E.

PROCUREMENT CHECK LIST

STATEMENT OF TECHNICAL REQUIREMENTS TITLE ............................

REFERENCE ............................

Notes:1. This Check List is to ensure that certain aspects of this Naval

Engineering Standard are consulted when preparing a Statement ofTechnical Requirements for a particular application.

2. Clauses where a preference for an option is to be used or where specificdata is to be added are included in the Check Listdata is to be added are included in the Check List.

3. Each item is to be marked either

! = included

NA = not applicable

CHECKNo CHECK

CLAUSENo ! or NA

1 Consumables may be upgraded by virtue ofthe results of periodic check tests and suchadditional tests as DNA(SM) NA 115 mayconsider necessary.

2.4b.

2 Approval of the consumable will normallybe limited at the discretion of ShipDepartment.

2.9b.

3 The production use or use of consumablesoutside the conditions listed in Annex D.shall be subject to individual approvalbetween fabricator and DNA(SM) NA 115.

2.10b.

4 Selection of alternative types of Charpyspecimens, if necessary to be given.

4.6b.


E.2ANNEX E.


INDEXINDEX.1

ALPHABETICAL INDEX

AAll-weld impact tests, 3.1, 4.3, 5.1, 5.3, 6.4

All-weld tensile tests, 3.1, 4.2, 4.3, 5.1, 5.3, 6.4

BBatch control, 6.3

Batch control tests, 1.1, 6.4

Batch definitions, 6.3, 6.4

CChemical analysis, 2.2, 3.1, 4.2, 5.1, 6.4

DDRA Dunfermline, 1.1

EElectrode manufacturers approval, 2.1

Evaluation, 1.1

FFabricators approval, 2.3, 2.4

HHealth and Safety, vi

IImpact tests, 5.2

Initial approval, 3.1, 4.1, 5.1

Initial tests, 2.1

MMechanical properties, 2.2

MIG wire/gas combinations, test requirements, 5.1, 6.4

MMA electrodes, test requirements, 3.1, 6.4

Multi-run technique all-weld metal, 4.2, 5.1

Multi-run technique V-butt test, 5.1, 5.2


INDEX INDEX.2

PPeriodic check tests, 2.1, 3.1, 4.3, 5.3

Product control requirements, 1.1, 3.1

Production control, 1.1, 2.1, 4.1, 5.1

RRe-tests, 2.2

SSpecial evaluation tests, 6.1

Square edge butt tests, 4.2

Square edge two run technique, 4.2, 4.3, 5.2

Submerged arc wire and flux combinationstest requirements, 4.1, 6.4

TTest panels, 2.2

Transverse bend tests, 3.1, 4.2, 5.2

WWeld metal mechanical properties, 2.2

Welding control parameters, 2.3

Inside Rear Cover

Crown Copyright 2000

Copying Only as Agreed with DStan

Defence Standards are Published by and Obtainable from:

Defence Procurement AgencyAn Executive Agency of The Ministry of Defence

Directorate of StandardizationKentigern House65 Brown Street

GLASGOW G2 8EX

DStan Helpdesk

Tel 0141 224 2531/2 Fax 0141 224 2503

Internet e-mail [email protected]

File Reference

The DStan file reference relating to work on this standard is D/DStan/69/02/769.

Contract Requirements

When Defence Standards are incorporated into contracts users are responsible for their correctapplication and for complying with contractual and statutory requirements. Compliance witha Defence Standard does not in itself confer immunity from legal obligations.

Revision of Defence Standards

Defence Standards are revised as necessary by up issue or amendment. It is important thatusers of Defence Standards should ascertain that they are in possession of the latest issue oramendment. Information on all Defence Standards is contained in Def Stan 00-00 Standardsfor Defence Part 3 , Index of Standards for Defence Procurement Section 4 Index of DefenceStandards and Defence Specifications published annually and supplemented regularly byStandards in Defence News (SID News). Any person who, when making use of a DefenceStandard encounters an inaccuracy or ambiguity is requested to notify the Directorate ofStandardization (DStan) without delay in order that the matter may be investigated andappropriate action taken.

CONTENTSTITLE PAGESCOPEFOREWORDSponsorshipConditions of ReleaseGeneralMOD Tender or Contract Process

Related DocumentsHealth and SafetyWarning

1. GENERAL INFORMATION1.1 Batch Testing1.2 Other Consumables1.3 DRA Dunfermline (Marine Division)

2. APPROVAL SYSTEM2.1 Electrode Manufacturers Approval2.1.1 General

2.2 Initial Tests2.3 Production Control2.4 Periodic Check Tests2.5 Re-tests2.6 Test Panels2.7 Mechanical Properties2.8 Chemical AnalysisTABLE 2.12.9 Welding Control Parameters (Welding Conditions Used in Tests)2.10 Fabricators ApprovalTABLE 2.2 WELDING CONSUMABLE APPROVAL DATA MANUAL METAL ARC ELECTRODESTABLE 2.3 WELDING CONSUMABLE APPROVAL DATA SUBMERGED ARCTABLE 2.4 WELDING CONSUMABLE APPROVAL DATA METAL INERT GAS

3. MANUAL METAL ARC ELECTRODESELECTRODE MANUFACTURERS APPROVAL3.1 Product Control Requirements3.2 Test Requirements for all Classes of MMA Electrodes including Hydrogen Controlled Electrodes

4. SUBMERGED ARC WELDING CONSUMABLESELECTRODE MANUFACTURERS APPROVAL4.1 Product Control Requirements4.2 Test Requirements for Submerged Arc Wire and Flux Combinations4.3 Initial Approval4.4 Multi-Run Technique All-Weld Metal4.5 Multi-Run Technique V-Butt Test4.6 Square Edge Two Run Technique4.7 Periodic Check Tests

5. MIG WELDING CONSUMABLESELECTRODE MANUFACTURERS APPROVAL5.1 Product Control Requirements5.2 Test Requirements for MIG Wire/Gas Combinations5.3 Initial Approval5.4 Multi-Run Technique All-Weld Metal5.5 Multi-Run Technique V-Butt Test5.6 Square Edge Two Run Technique5.7 Periodic Check Tests

6. CONSUMABLES FOR WELDING SUBMARINE STEELS6.1 Batch Control6.2 Patch Definitions6.3 Batch Control Tests

ANNEX A. RELATED DOCUMENTSANNEX B. DEFINITIONS AND ABBREVIATIONSANNEX C. WELD METAL MECHANICAL PROPERTIES AND TEST PANEL REQUIREMENTSNOTES TO ANNEX C.

ANNEX D. MOD(PE) SSC APPROVED WELDING CONSUMABLESLIST 1SHEET 1LIST 1SHEET 2LIST 1SHEET 3LIST 1SHEET 4LIST 1SHEET 5LIST 1SHEET 6LIST 1SHEET 7LIST 2SHEET 1LIST 2SHEET 2LIST 2SHEET 3LIST 2SHEET 4LIST 2SHEET 5LIST 3SHEET 1LIST 4SHEET 1LIST 4SHEET 2LIST 4SHEET 3LIST 4SHEET 4LIST 4SHEET 5LIST 5SHEET 1LIST 5SHEET 2LIST 6SHEET 1LIST 6SHEET 2

ANNEX E. PROCUREMENT CHECK LISTALPHABETICAL INDEX

NES 769 Approval System for Welding Consumables for Structural Steels Category 2

Documents

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