Indian StandardSPECIFICATION FOR

STRUCTURAL STEEL (STANDARD

(Fifth Revision)

2=

VQUALITY j

Fifth Reprint JUNE 1986(IncorporatingAmendmentsNo. I to 3)

UDC 669’14~O1&292

E.c.G~IF3PAR~II MAD A

0 Copyrlghf 1979

INDIAN STANDARDS INSTITUTIONMANAK UHAVAN, ~ BAHADUR SHAH ZAFAR MARO

NEW DELHI 110002

Gr4 April 1*7k

IS: 226-197$

CN\

Indian Standard \~

~SP~WiCATION FORSTRUCTURAL STEEL (STANDARD

(Fifth Revision)QUALITY)

WroughtSteel ProductsSectionalCommittee,SMDC 5

Chairman

DR U. N. BHRANY

Representing

Modella Steeland Alloys Ltd, liombay

Members

Stoat E. ABRAHAM Associationof IndianEngineeringIndustry,CalcuttaS~ut M. ANJANEYULU Mining & Allied Machinery Corporation Ltd.

DurgapurSisat D. P. SANYAL (Attereate)

SansN. C. BAocrn National Test House, CalcuttaSHRI A. K. BANERJEE Metallurgical and EngineeringConsultant ( India)

Ltd, RancIdSaxi B. N. Ssso~a(Alternate )

SaRI S. BANERJF~ SteelRerolling Mills Associationof India,CalcuttaSHRI S. K. BARr Guest,Keen,Williamt Ltd, Howrah

Sims A. RoY CHOWnHURY (Alprnate)Da S. S. BuATNAGAR National Metallnrgical Laboratory ( CSIR),

JamshedpurSsoax Y. P. S. Bt~itNoi 1~okaroSte~slLtd, BokaroSteelCity

Sititti. C. E,nty ( AlierchSHRI P. K. CttAxstA ~ARi7Y Tata Iron & SteelCo Ltd, Jamshedpur

Stint M. C. KUMARASWAMY (Alternate)SHtu G. CUAYTS~RJe.E HindustanSteel Ltd, Durgapur

Sisni K. Z. MAYHEM (Alternate)Stoat P. K. CH~ATTERJEE Ministry of Defence (DGI)

Stoat M. M. GUPTA (Alternate)Dn N. S. DATAOt HindustanSteel Ltd, Rourkela

SnaxK. S. Surnis (Alternate)

(Coehmudou~qe2)

‘-I...

0 Cofrymight 1979INDIAN STANDARDS INSTITUTION

This publication is protectedunder the Indian Copyright Act (XIV of 1957) andreproductionin wholeor in part by any meansexceptwith written permissionofthepublishershall bedeemedto beaninfringementof copyright under thesaidAct.

IS: 226-1975

(Corutinuedftompage I

Members Representing

MAJ-GEN M. G. DEWAN Tinplate Company of India Ltd, Golmur,Stoat S. BALASHANKAIS (Alternate)

DIREcTOR (M & C) Ministry of Railways

CHEMtST & METALLURGIST,CISITTARANJAN Locoato-rIVE WORKS ( Alternate)

SaRI A. K. CubA lntpecsion Wing, DirectorateGeneralof Supplies&Ditposals, New Delhi

SssRsP. C. MUSTAFI ( AlternateJOINT DItsEc~sOn STANDA RIJS Ministry of Railways

XX AG ONJot~r l)mnEcroH IstoN &

STEEL ) (Alternate~ V. C. KA~nYer SpecialSteelsl.td, Bombay

Sisut S. S. NI UJIANJAN ( AlternateSHut M. N. KLIANNA HindustanSteel Ltd, llhilai

Smut K. C. SuM ( Alternate)SaRI K. M. KIHSHNAN Iron and Steel Control, CalcuttaDu D. M. LAm tItAN! Indian Iron & Steel Co Ld, Burnpur

Snut ‘F. 1K. DATTA ( .4lternateSus~P. LAX~!INARAYANA Hindustan SI’ipvard Lsd, VisakhapalnansStiRs R. C. MAMA JAN Indian Steel and Wire Products Ltd, Indranagar

Situs AVTAR St~ott ( A jternate)Dim S. S. MALUOTRA Metal Box Cu of India Ltd, Calcutta

SuEt K. R. NAV.ASIMtIAN ( AlternateSmsa D. Y. MoGIIE Directorate General, OrdnanceFactories (Ministry

of Defence), Calcutta

SHut D. S~e Alternate)Sisut R. H. G. RAM Mukand Irots & Steel Workt Ltd, Bombay

Siius S. A. NIGAM (Alternate)Sisisi D. V. REDDI Indian Institute of Metals,CalcuttaSstHI N. SEN Roy Joint Plant Consmittce,Calcutta

SHRI D. SEINIVASAN (Alternate)SuEsR. K. SETh Industrial Fasteners’ Astociasion of India, CalcuttaDa S.J. SHAH Spinning Machinery (Cotton System) Sectional

Committee, TDC 30, ISITECtoNICAL ADVYSER (BOILERS ) Central Boilers Board, Ministry of Industrial

i)evelopment, New DelhiSastsK. S. VAIDYANATISAN M. N. Dastur & Co ( Pvt ) Ltd,CalcuttaStoatG. VLEKA’rR~WARLV Ministry of Defence ( K & D

Snus L. S. IIItAUTRAYHA RAO ( Alternate)SassiC. R. RAMA RAO, Director General, IS! (Ex-~fficio Member)

Director ( Struc & Met

Secretary

Sisut SHANi’I SWARtTP

Assistant Director ( Metals ) , IS!

Continuedon /sage13)

2

IS: 226.197$

ZW -

Indian StandardSPECIFICATION FOR

STRUCTURAL STEEL (STANDARD QUALITY)

(Fifth Revision)

0. FOREWORD

0.1 This Indian Standard(Fifth Revision) was adoptedby the IndianStandardsInstitution on 15 January 1975, after the draft finalized by’the WroughtSteelProducts SectionalCommitteehad been approvedbythe Structural andMetals Division Council.

0.2 This standardwasfirst issuedin 1950 in responseto arequestmadeto the Steel Advisory Committee of the Governmentof India by steelmanufacturers in the cou~ary. It was revised in 1955, 1958, 1962and 1969.

0.3 In this revision, provision has been made for removal of surfacedefects by chipping or grinding as is being followed in manyothercountries. Further, it has been made clear that this standard coversstructural steel ( standardquality ) intended to be used for all types ofstructures including thosesttbjectedto dynamic loading andwherefatigue,wide fluctuation of stresses,reversal of stresses and great restraint areinvolved asfor examplein cranegantrygirdersandroadandrail bridges.Steel specifiedin this stan atd is suitable for welding provided that thethickness of material (ices not exceed 20 mm. When the materialconforming to this standard i: over 20 mm thick, special precautionsmay berequiredin casethe material is to be welded (seeIS: 823~l964*).

0.3.1 The designations of steelshave beenaligned with the reviseddesignationsgiven in IS: I 762 (Part I )-1974t. However, the old designa-ttons are also given in parenthesislbi~ information.

0.4 The steel products conforming to the requirementsof this specifi-catton can be rolled from the billets conformitig to IS 2830-1975 orIS : 69l4-1973§.

Code of procedure for manual metal arc welding of mild steel.tCodefor deaignationof steels:Part I Based on letter symbols (first revisicE),Specificationfor carbonsteelbillets, bloomsand s!absfor re-rolling into structui,J steel

~standard quality) (Jirs: revision).ISpecification for carbon steel cast billet ingot. for re-rolling into structural steel

st adard qisaility).

3

18:226-1975

0.5 For the purpose of deciding whether a particular requirement ofthis standard is complied with, the final value, observed or calculated,expressing the result of a test or analysis, shall be rounded off inaccordance with IS : 2~l960*. The number of significant placesretainedin the rounded off value shouldbe the sameas that of the specifiedvaluein this standard.

1. SCOPE1.1 This standard covers the requirements for mild steel (standardquality) plate, sectionsand bars, etc, designated as Fe4lO-St (5t42-S)for use in structural work.

1.1.1 The steel may also be supplied in copper-bearingquality inwhich case it shall be designatedas Fe4lOCu-S(5t42-SC).

2. SUPPLY OF MATERIAL2.1 General requirements relating to the supply of steel shall conformto IS : l387-l967~.3. MANUFACTURE3.1 Steel shall be manufacturedby the open-hearth,electric, duplex,basic-oxygen or a combination of these processes. In case arty otherprocess is employed by the manufacturer, prior approval of the purchasershould be obtained.

3.1.1 Steel shall be supplied semi-killed or killed. Rimming steelshall be suppliedonly by special agreementbetweenthe purchaserandthe manufacturer.

4. CHEMICAL COMPOSITION4.1 The ladle analysis of steel, when made in accordance with IS: 228-

1959§,shall be as follows:

Constituent Percent,MaxCarbon(for thicknessldiameter20 mm 023

andbelow)Carbon (for thickness/diameterover 015

20 mm)Sulphur 0055PhosphorL 0055

NOTE I — Whensteel is required in copper-bearingquality, the copper contentshall bebetween.020 and035 percent.

Rules for rotlndirlg off numericalvalues(revised).jSe~15:1762 ( PartI )-1974 Code for designation or steel: Part I Based on letter

symbols(first revision).:General requirementsfor the supplyof metallurgical materials (first revision).~Ntetbodsof chemical analysis of pig iron, cast iron and plain carbon and low-alloy

ateels ( revised)(Since revised and split into two parts).

4

IS ~226d975

Nom 2—When the steelis silicon killed,tl.seproductanalysissh~ll~showa mini-mum of 010 percent silicon. When the steel is aluminium killed or killed with acombination of aluminium and silicon, tire requirementregarding minimum siliconcontent does not apply.

4.2 Product Analysis— The product analysis shall be carried out onthe finished product from the standard position. Permissible variationin case of such productanalysisfrom the limits specified under 4.1 shallbe as follows:

Constituent VariatiomT, Over Specf,iedMax:mumLimit,

Percent,MaxCarbon (for thickness/diameter20 mm 0-02

and below)

Carbon (for thickness/diameterover 00320 mm)

Sulphur 0i305Phosphorus 0005

NOTE — Productanalysisshall not apply to rimming quality steel.

5. FREEDOM FROM DEFECTS

5.1 All finishedsteelshall bewell and cleanly rolled to the dimensions,sectionsandweights specified. Thefinished material shall be ‘free fromcracks; surface flaws; latninations; rough, jagged and imperfect edges;andall other harmful defects.

5.2 Minor surface defects may be removed by the manufacturerbygrinding providedthat the thicknessis notreducedlocally by more than4 percent(with amaximumof 3 mm). Reductions greater than 4 percentbut not exceeding7 percentmay be madeonly with the agreementofthe purchaser.

5.2.1 Subjectto agreementwith the purchaser,surfacedefects whichcannotbe dealtwith asin 5.2 may be repairedby chipping or grindingfollowed by welding providedthat:

a) after completeremoval of the defects .ind before welding, th~thicknessof the item is in no place reducedby more than 20percent;

b) weldingis carried out by an apprcvedprocedureby competentoperatorswith approvedelectrodesand that the weld is groundsmoothto the correctnominal thickness;and

c) subsequentto the finish grinding, the item may be requiredto be normalized or otherwiseheat~treated.at the purchaser’sdiscretion.

5

15:226 -1975

6. SELECTION AND PREPARATION OF TEST SAMPLES6.1 The points from which testsamplesare takenshall be so located inthe product as to yield the clearest possible information regardin~propertiesin the cross-sectionaland longitudinal pLnes. The recom-mendedlocations for taking testsamplesfor plates,sectionsandbar•sareindicatedin Fig. 1. Alternatively, in caseof sections,the samplesmay betakenfromtheweb.

6.2 Whereverpracticable,therolled surfaceof the steelshall beretainedon the two opposite sidesof the testsample.6.3 In caseof flat test samplesfor tensile test, both surfaces are normallytQ be left on the test specimenfor plateup to 32 mm thick. At least.dne rolled surfaceshall be left on rectangulat test samplestakenfromplatemorethan32 mm thick. Round test samplesare permitted, butshouldonly be adoptedfor thicknessexceeding28 mm.6.4 In caseof flats up t& 16 mm thick, the testsampleshallundergo,ifpossible,no machiningwhatsoeverprior to use as a test piece. If this isnot possible, the test sample shall undergo the minimum amountofmachining.6.5 Bars”belo~28mm mayalso be testedwithout machining. In caseofbars having diametersor thicknessesbetween28 and 71 mm, the bars-may be symmetrically reducedby machining. For barshaving diametersor thicknesses exceeding 71 mm, the test sample may be taken from theposition shown in Fig. 1.

6.6 In the case of sections, flats and plates, bend tests are to be carriedout on rectangulartest samples which, as far as possible, should be ofthe full thicknessof the product. In the caseof sections,flats andplates.exceeding28 mm in thickness,it is permissibleto remove metal fnim oneside of the testsamplebefore using it as a test piece. The rolled surfaceof the testpieceshall be on the outerside of the bendduring the test.6.7 Before test samples are detached, full particulars regarding castnumber,sizeand weightof plates,sections,flats and bars in each castshall be furnished by the manufacturerto the purchaser. In case ofplates,the numberof platesineachcast shall also be given.6.8 Test samplesshall be cut in sucha mannerthat deformationis avoid.ed as far as possible, if guillotining or flame-cutting is employed,anadequateallowanceshall be left for removalby machining.6.9 Testsamplestakenfrom rolled steelwhich haveundergonedeforma-tion through bendingor twisting shall in all casesbestraightenedcold.If the deformationis too severeto allow cold straightening,it is per-snissible, in the caseof materialsto be delivered i~ the annealedornormalizedcondition. to carry out straighteningunder the applicationof heat, provided the temperaturedoes not exceed 65000. Whilestraighteningtest samples,careshallbe takento avoid any cold-workingor temperaturerise which will alter the propertiesof the samples ascomparedwith the finished product which they represent.

6

AMENDMENT NO. 5 FEBRUARY 1984

TO

IS:226-1975 SPECIFICATION FOR STRUCTURALSTEEL

(STANDARD QUALITY)

(Fifth Revision)

Al terati ons

(Page 4, clause 4.1, first twn lin~sl — Substitutethe following for the existing lines:

‘14.1 The ladle analysis of steel, when carried outeither by the method specified in the relevant parts ofIS:228~ or any other established instrumental/chemicalmethod shall be as follows. In case of dispute, theprocedure given in relevant parts of IS:228§ shall bereferee method.’

(Page 4, fo~It—note with ‘§‘ mark) — Substitutethe following for the existing foot—note:

‘~Methods of chemical analysis of steel (issuedin various parts).’

Adden dum

(Page 4, clause 1.1) — Add the following note after1.1:

‘NOTE — Strip in coil form may also be suppliedBubject to prior agreement between the supplier and

the purchaser.’

(sMDc 5)

Printed at Simco PrintIng Press, Delhi, India

IS:226-1975

EZZZZZ2

POSITI0o~ orS AMP1~E S

FIG. I STRUCTURAL STEEL SEcTIoNs, PosirIoN ANDORIENTATION OF SAMPLES

7

6.10 Test samplesshall not be annealedor otherwisesubjectedto heattreatmentunlessthe material from which they are cut is similarly treat-ed, in which case the test samplesshall be similarly andsimultaneously

treatedwith themateria!beforetesting. Any slight straighteningof testsampleswhich may be requiredshall be donecold.

7. TENSILE TEST

7.1 Number of Tensile Tests

7.1.1 Plates,Sections( Angles,Tees,Beams,Channels,ele) andFlats— Onetensile test shall be made from finished steelfor every40 tonnes or partthereofrolled continuouslyfrom eachcast,a separatetest beingmadeforeachclass of steel product ( namely, plates, sectionsand flats ) rolledfrom a cast.

7.1.1.1 Where plates, sectionsor flats of more than one thicknessare rolled from the samecast, oneadditional tensiletest shall be madefrom the material in each classof prochtct for each viriation in thick-nessof 6 mm.

7.1.2 Ben’s ( Round, Squareand Hexagonal)— One tensile test shall bemade from finished steel for every 4U tonnes or part thereof rolledcontinuouslyfrom eachcastandfor everyclassof product. When morethan one diameter or thickness of the bar is specified, ~ne additionaltensile test shall be made for each diameter ‘or thickness of the barordered,if so desiredby the purchaser.

7.2 Tensile Test Pieces The tensile strength, yield stressandper-centageelongationof steel shell be determinedfrom standardtest piecescut lengthwiseor crosswisefront platesandlengthwisefrom sections,flatsand bars. The tests shall be carriedout on Indian Standardtest piecespreparedin accordancewith IS : I~08~l972*.

7.3 Tensile Test — The tensile strength, yield stressand percentageelongation,when determinedin accordancewith IS: l608~l972* shall beasgiven in Table I.

7.3.1 Th caseof sections,the thidtncssof whiTh is not uniform through-out the profile, the limits shall be applied accordingto the actualmaxi-mum thicknessof thepiece selectedfor testing.

7.3.2 Should a tensile test piece break outsidethemiddi~ halfof itsgauge length (seeIS: l608~l972*) and the percentage elongationol)tained is less than that specified, the test may be discar~dtd at themanufacturer’soption, and another. test made from the same plate,section,flat or bar.

Method for tensile testingof steI~products (first reviiioe).

8

IS:226-1975

TABLE 1 MECHANICAL PROPERTIES OF STRUCTURAL STFEL(STANDARD QUALITY)

(Clause7.3)

CLASS OF STEEL

PuorsucT

(I)

NOMtNAL ‘rtotcx-NESS/

DIAMETER

(2)

mm

TENSILE5YIELD PERCENTAGE

STISENOTIt STuEss, ElONGATION,Mm Mm, GAUGE

LENGTH

565 V~

(3) (4) ~5)N/mm’ N/mm!

( kgflmrnt) (kgf/mm’)

Plates, sections (for

example, angles,tees, beamt, chan-nels, etc ) and flats

Below6

6 up to andincluding 20

*Bend test only shall be required

410 to 530 250(42to54) (26)

Over 20 up to and 410 to 530including 40 (42 to 54)

Over40

Below 10Bars (round, squa- 10 up to andreand hexagonal) ~ including 20

LOver 20

240(24)

410 to 530 230(42to54) (23)

23

23

23

tBend test only shall he required

410’ to 530 250(42to54) 26

410 to 530 240(42to54) 24

23

23

NOTE I —1 N/mm1 — 1 MNm’ — 0102 0 kgfmm5.

NOTE 2 — Provided that the yield stressand elongationrequirementsare ompliedwith, the upper limit for tensile strength may be raisedby 30 N/mm2 ( 3 kgf.mm2).

NOTE 3—Gauge lengths other than5~65VS

0 may alto be used,in which casetheelongation shall be read from IS 3803-1967‘Methods for elongation conversions forsteel’.51n caseof plates, sections,and flats below 6 mm, the yield stressshall he assumed

to be at least thesameas that for thicknessbetween6 and 20 mm.

tIn caseof bars below 10 mm diameter, the yield stress shall he assumedto [se atleastthe sameas for bars of dianseterbetween10 atsd 2(1 mm.

8. BEND TEST

8.1 Number of Bend Tests — Bend test shall be made from finishedsteel from each cast. The number of tests for every 20 tonnes ofmaterial, or part thereof, rolled contintotssly, shall be as shown inTable2. Oneadditional test shall be made for each classof productandfor eachvariation in thickness.

9

18:226-1975

TABLE 2 NUMBER OF 3END TUTU(~lasss.8.1)

CLAss or STEEL PRODUCT Nuxaaa 07Enun TZUTs

(1) (2)

Section 1 lengthwise(for eachtype)Plates I lengthwiseandlor I crosswise

Flats and bars (rousd, square I lengthwiseand hexagonal)

8.2 Bend Test Pieces — Thetestpiecesshall becut lengthwiseor cross-ws’eor both from plates,and lengthwise from sections,flats and bars.When sectionspermit, theseshall be not lessthan 40 mm wide. If themanufacturerso desires,round, square,hexagonalandflat bars shall bebent in the full sectionas rolled.

8.2.1 In all bend test pieces, the rough edge or arris resultingfromshearing may beremoved by filing or grinding or machining, but thetr-:t piecesshall receiveno other preparatton.

8.2.2 The test piecesshall not be annealedor otherwisesubjectedtoheat treatment unless the material from which theyarecut is similarlytreated,in which casethetest piecesshall besimilarly andsimultaneouslytreatedwith the material, beforetesting.

8.3 Bend Test —~ Bend test shall be conducted in accordance witlkIS l599~l974*.

8.3.1 For bend tests except in the caseof round bars 25 mm in dia-meterandunder, the test piece when cold shall, without cracking, bedoubled over either by pressureor by blows from a hammeruntil theinternal diameteris not greater than threetimes the thicknessof the testpieceandthe sides areparallel.

8.3.2 In the case of round bars 25 mm in diameter and under, theinternal diameter of the bend shall be not gsiater than twice thediameterof the bar.

9. DIMENSIONS

9.1 Unless otherwise agreedto betweenthe purchaserand the manu-facturer the nominal dimensions of rolled steel productsconforming tothis specification shall be in accordance with the relevant IndianStandards; currently available Indian Standards are tisted in Table 3.

Method for bend test for steelproducts other than sheet,strip, wire and tube(first revs,ion).

10

IS ~226-1975

TABLE 3 INDIAN STANDARDS WHICH GIVE NOMINAL DIMENSIONSOF ROLLED STEEL j’RODUCTS

lCtausey.l j

PRODUCT

Beam chans’ieland anglesections

Beams,MB series

Beam,channelandanglesections

Teebars

Bulb angles

Plates,sheetandstrip

Flats

Round andtquarebars

Bulb plates

Sheet,piling sections

Channel sections

Platesfor ship’s hull structure

RELEVANT INnIAN STANDAuD

IS 808-1964Specification fQr rolled tseel beamchanneland angle sections(revised)

IS:tlOB (Partl)-1973 Dimensions of hotrolled steelhcam~:Part 1 MB series (secondrolled s

IS: 1864-1963 Dimensions for angle sectionswith legsof unequalwidth and thickness

15: 3954-1966Specification for hoe rolled steelchannel sections for general engineeringpurposes

IS: 1173-1967 Specification for hot rolled and

slit steel,teebars (first revision)IS:1252-1958 Specification for rolled steel

sections,bulb angleIS :1730-1974Dimensions for steel plate, sheet

and strip for structural and general engineer-isig purposes(first revisio,s

Part I PlatePart 2 Sheet

Part 3 Strip

IS:1731-1971 Dimensions for steel flats forstr~ctural and general ?ngineering purposes(first revision

IS:1732-1971 Dimensionsfor round and squaresteel bars for structural and generalengineeringpurposes(first revision)

15 :1863-1961Dimensionsfor rolled steel bulbplates

IS : 2314-1963Specificationfor steelsheetpilingscctions

IS : 3954-1966 Specification for l~ot rolled steelchannel sections for general engineeringpurposes

IS : 5488-1969 Dimensions for hot rolled steelplatesfor ship’s hull structures

10. TOLERANCES

10.1 UnIt otherwise agreedto betweenthe purchaserand the manu-facturer, the rolling andcutting tolerancesfor steel productsconformingto thisstandardshall be thosespecifiedin IS l852~l973*.

Rolhingandcutting tolerancesfor hot rolled steelproducts(secondrevision).

11

IS :226-1975

11. RETESTS

11.1 Should any one of the test piecesfirst selected fail to passany ofthe tests specified in this standard,two further samples shall be selectedfor testisig in respectof each failure, Should the test piecesfrom boththeseadditional samplespass,thematerial representedby the test samplesshall he (leernedto comply with the reqttiremeistsof that particular test.Shotild the test pieces from either of these additional samplesfail, thematerial representedby the test samplesshall be consideredas not havingcomplied with tlsis standard.

12. CALCULATION OF WEIGHT

i2.I The weight of steelplates.sectionsflats and barsshall becalculated

t)t/ thebasis that steel weigi 7’85 g cm3.

13. DELIVERY13.1 Stibject to prtor ~sgreernent betweets he purchaseratsrl the rnanu—f/n i rer, suitable prnteclive treatment may be givets to the materialat wr tOll/fl/f.

14. MARKING

14.1 oh pr-eloct. except eund, squareand hexagonal barsaticl flatscatr; a 1) tat/I or Ito >tampKd with the mannfactt rer~ nasneor

e—tsiark. In the ase of bars and Hats, the tag shall bear Use matsn

I. r V 5 naml ir trade—tn/srk. II)e.~imnat icts o steel should also ben//iatlv rnarkd rn the pro~ittct or ags.

3>1.? lIvery htavv and snedi/itn emrticturms miii pt elsicts andeachplate of

iiticktie 10 mm and over shall be stau.j d dx ich the eastnt/rnher andr//atlt I ta(;tiirers name or trade—mark. Itt in of phales below 10 mm

I ickne~s, the lop ItImite of eachpile ( which m is consist of approximna—telx 16 plates) shall he markedwit It the i~ m. utimber.

14.3 The steel hall hr Sm it ably painted xx t a colour in accordancewithIS : 204~i-l~J63~

14.3.1 The material may also h/ mattwo with the ISI CertifteatiocMask.

NOTE— The u.se of the ISI Ccrtificatic,n Mark is governed by the provisionsof theIndian StandardsInstitution ( CertificationMarks) Act andtheRules and Regulation,made thereunder. The 1St Mark on products covered by an Indian Standardconveysthe assurancethat they have been produced to comply with the requirementsof thatstandardunder a well-defined system of inspection,testing and quality controlwhich is devisedand supervisedby IS! and operated by the producer. 1St markedproductsare also continuouslycheckedby IS! for conformity to that standardas afurther safeguard. Details of condition,under which a licence for the useof the ISICertification Mark may be grantedto manufacturersor processors,may be obtainedfrom theIndian StandardsInstitution.

Colos.r code for she idenmification of wrought steels for general engineeringput i~0s5

12

IS:226- 1975

Centinuad from page 2 1

Strttctural SteelsSubcommittee,SMDC 5 : 2

Cant’.nor

Da U. N. BERANY

Members

ASSISTANT Dsstxcroa (MS)DEPUTY 1)iaEcToa (B&S )-I

DaJ.J. IaANsSEESM. N. KIIANNASaasS. B. KNAHESgstsB. L. KSRATRIYADR D. M. LAKESANISstasP. LAXMINARAYANA

Da S. NARAHALIS RAOREPRESENTATIVESEESXV. R. D. SAXTON

StiRsH. S. RAO ( AtternateSaasM. K. SENSassV. R. SUHRAMANIAN

SstasS. MALIK (Alternate)SsasK. M. TANEJA

Represe~ttsngModellaSteel& Alloys Ltd, Bombay

Ministry of Ra,ilwaysAlternateTataIron & Steel Co Ltd,JamshedpurBhilai Steel Plant, BhilaiCentralBoilers Board, New DelhiRourkelaSteel Plant, RourkelaIndian Iron & Steel Co Ltd, BurnpurHindustanShipyardLtd, VisakhapatnamStructuralEngineeringResearchCentre,RoorkeeBraithwaite & Co ( I ) Ltd, CalcuttaLloyd’sRegisterof Shipping, BombayMinistry of Defeace(DGI

Indian Oxygen Ltd, Calcuua

DirectorateGeneralof Supplies& ~)isposats

13

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