DESIGN APPLICATION & FABRICATION OF S460M TMCP STEEL...

1Copyright © 2014 JFE Steel Corporation. All Rights Reserved.

DESIGN APPLICATION & FABRICATION DESIGN APPLICATION & FABRICATION

OF S460M TMCP STEEL PLATES IN STEEL OF S460M TMCP STEEL PLATES IN STEEL

AND COMPOSITE STRUCTURESAND COMPOSITE STRUCTURES

KOJI Oki

JFE Steel Corporation

Jan. 22th, 2015


BackgroundBackground

2010 JFE STEEL had introduced S460M TMCP STEEL PLATES

into asian market.

2011 ～～～～ JFE STEEL had started supplying sample plates of S460M

and collecting weld joint data.

2012 ～～～～ JFE STEEL had started supplying S460M

for the building projects.

Advantages of S460M TMCP Steel Plates

•High yield strength & toughness

•Short lead time

•Good Weldability

•S460M TMCP Steel is low-alloyed metal


ContentsContents

1. Design Application of S460M Steel Plate1. Design Application of S460M Steel Plate

2. Design Practice of S460M Steel Plate2. Design Practice of S460M Steel Plate

3. Fabrication of S460M Steel Plate3. Fabrication of S460M Steel Plate

4. Conclusion4. Conclusion


Design Application of S460M Steel PlateDesign Application of S460M Steel PlateHighHigh--rise building projectsrise building projects* Outrigger truss * Outrigger truss

* Mega column (composite)* Mega column (composite)

* Transfer girder* Transfer girder

* * KingKing--post (steel & composite)post (steel & composite)

Theatre building ProjectsTheatre building Projects* Roof* Roof--trusstruss


1880kg/m1880kg/m1880kg/m1880kg/m2350kg/m2350kg/m2350kg/m2350kg/mUnit WeightUnit WeightUnit WeightUnit Weight

Section AreaSection AreaSection AreaSection Area

2400 cm2400 cm2400 cm2400 cm2222

Axial Design StrengthAxial Design StrengthAxial Design StrengthAxial Design Strength

96,000kN96,000kN96,000kN96,000kN

※※※※Design Code: Eurocode4Design Code: Eurocode4Design Code: Eurocode4Design Code: Eurocode4

Section AreaSection AreaSection AreaSection Area

3248 cm3248 cm3248 cm3248 cm2222

Axial Design StrengthAxial Design StrengthAxial Design StrengthAxial Design Strength

95,800kN95,800kN95,800kN95,800kN

※※※※Design Code: Eurocode4Design Code: Eurocode4Design Code: Eurocode4Design Code: Eurocode4

(Encased(Encased(Encased(Encased----Steel)Steel)Steel)Steel)

AxialAxialAxialAxial

DesignDesignDesignDesign

StrengthStrengthStrengthStrength

SectionSectionSectionSection

SizeSizeSizeSize

S355S355S355S355

(Design Strength= 295N/mm(Design Strength= 295N/mm(Design Strength= 295N/mm(Design Strength= 295N/mm2222

))))

S460MS460MS460MS460M


))))


GradeGradeGradeGrade

Design Application of S460M Steel Plate Design Application of S460M Steel Plate --Design Case StudyDesign Case Study--

1000mm

140mm140mm140mm140mm


1000mm



20% Saving!!20% Saving!!20% Saving!!20% Saving!!


SiteSiteSiteSite----WeldWeldWeldWeld

(supposing Full Penetration(supposing Full Penetration(supposing Full Penetration(supposing Full Penetration※※※※))))

●●●●weld volumeweld volumeweld volumeweld volume

41cm41cm41cm41cm2222

/weld/weld/weld/weld

(supposing Full Penetration(supposing Full Penetration(supposing Full Penetration(supposing Full Penetration※※※※))))

●●●●weld volumeweld volumeweld volumeweld volume

91cm91cm91cm91cm2222

/weld/weld/weld/weld

WeldWeldWeldWeld----HHHH

FabricationFabricationFabricationFabrication

S355S355S355S355


))))

S460MS460MS460MS460M


))))


GradeGradeGradeGrade

Design Application of S460M Steel Plate Design Application of S460M Steel Plate --Design Case StudyDesign Case Study--

●●●●Weld volume:33cm2

●●●●Arc time: apprx. 15hr.●●●●Weld Volume:62cm2

●●●●Arc time: apprx. 28hr.

100mm

Flange Flange

62cm2

(207pass)33cm2

(110pass)

※Partial Penetration Weld will be practical alternative choice.

140mm




Design Practice of S460M Steel PlateDesign Practice of S460M Steel Plate

Code of PracticeCode of Practice*Material :*Material : BC1:2012 (BCA)BC1:2012 (BCA)

⇒⇒⇒⇒⇒⇒⇒⇒S460M is listed in BC1 as certified material.S460M is listed in BC1 as certified material.

**Structural Design:Structural Design:

(Steel construction)(Steel construction) EN 1993(Eurocode3)EN 1993(Eurocode3)

⇒⇒⇒⇒⇒⇒⇒⇒S460M is listed in EN 1993 as applicable steel. S460M is listed in EN 1993 as applicable steel.

(Comp. construction)(Comp. construction) EN 1994(Eurocode4)EN 1994(Eurocode4)

⇒⇒⇒⇒⇒⇒⇒⇒S460M is recognized as applicable steel in EN 1994.S460M is recognized as applicable steel in EN 1994.

*Execution & Fabrication:*Execution & Fabrication: EN 1090EN 1090--22

⇒⇒⇒⇒⇒⇒⇒⇒S460M is listed in EN 1993 as applicable steel. S460M is listed in EN 1993 as applicable steel.



Typical Application of S460M for Structural membersTypical Application of S460M for Structural members

*S460M welded*S460M welded--shape is one of shape is one of

the most effective materials the most effective materials

in reducing the member size of in reducing the member size of

extraextra--large section.large section.

⇒⇒⇒⇒⇒⇒⇒⇒ Cost saving in Cost saving in strctstrct. steel . steel

⇒⇒⇒⇒⇒⇒⇒⇒ Reduction in siteReduction in site--job workloadjob workload

ex. Siteex. Site--welding, Cranewelding, Crane--lifting lifting

(Steel)(Steel)

・・・・・・・・ColumnColumn

・・・・・・・・TrussTruss

--elementelement

・・・・・・・・TransferTransfer

--girdergirder

WeldedWelded--H / Box etc.H / Box etc.

RemarkRemarkProfileProfileMemberMember

Large H-shapew/ Thin-web

& Thick-flange

Large H-shapew/ wider-flange Box shape

Profile shape & dimensions Profile shape & dimensions can be tailored to the designcan be tailored to the design--constraints of individual constraints of individual prjprj..



Typical Application of S460M for Structural membersTypical Application of S460M for Structural members

*S460M welded*S460M welded--shape is one of shape is one of

the most effective materials the most effective materials

in simplifying fabrication & onin simplifying fabrication & on--

site job as well as in material site job as well as in material

savings.savings.

⇒⇒⇒⇒⇒⇒⇒⇒Reduction in siteReduction in site--job workloadjob workload

ex. Siteex. Site--welding, Cranewelding, Crane--liftinglifting

⇒⇒⇒⇒⇒⇒⇒⇒Simple weldedSimple welded--shape is better shape is better

in concrete casting & filling rather in concrete casting & filling rather

than combining rolledthan combining rolled--shapeshape

WeldedWelded--H / Box etc.H / Box etc.(composite)(composite)

・・・・・・・・MegaMega

--columncolumn

・・・・・・・・KingpostKingpost

RemarkRemarkProfileProfileMemberMember

Large H-shapew/ Thin-web

& Thick-flange

Large H-shapew/ wider-flange

Profile shape & dimensions Profile shape & dimensions can be tailored to the designcan be tailored to the design--constraints of individual constraints of individual prjprj..


Fabrication Practice of S460M Steel Plate Fabrication Practice of S460M Steel Plate

1) Fabrication Practice of S460M Steel Plate1) Fabrication Practice of S460M Steel Plate

2) W2) Weldingelding PProcedurerocedure QQualificationualification of S460M Steel Plateof S460M Steel Plate

3) Weld Test Results of S460M Steel Plate3) Weld Test Results of S460M Steel Plate


Fabrication Practice of S460M Steel PlateFabrication Practice of S460M Steel Plate

Cutting/Holing & Assembling

Welding

Shaping / Bending

・S460M can be handled in the same manner w/ S355.・Please refer clause 6.4 & 6.9 in EN 1090-2

for the detailed directions.

・S460M shall be welded w/ different welding consumables & welding conditions than conventional steels.・S460M requires more stringent quality assurance program.・The major points are presented in this brochure.

・S460M can be handled in the same manner w/ S355except hot-forming, which is not allowed for S460M.・Please refer clause 6.5 in EN 1090-2 for the detailed directions.


Fabrication Practice of S460M Steel PlateFabrication Practice of S460M Steel Plate

Typical Welding Consumables

Recommended Welding Conditions

*Preheating temp. should be selected according to BS EN1011-1

S460MS355

AWS A5.28 ER80S-GAWS A5.18 ER70S-GGMAW

AWS A5.29 E81T1-K2CAWS A5.20 E71T-1C etcFCAW

AWS A5.5 E9016-G etc.AWS A5.1 E7016 etc.SMAW

Material Spec.Welding Process

S460M

≦250℃

InterpassTemp.

≦250℃

InterpassTemp.

Heat Input

Heat Input

≦40kJ/cm≦40kJ/cm

SMAW

FCAW

GMAW

S355Welding Process


Images of Welding Test

WWeldingelding PProcedurerocedure QQualificationualification of S460M Steel Plateof S460M Steel Plate

EX4EX3EX2

≦YS/275EN 15610Tested

Welding

Consumable

≦YS/355EN 15612Standard

Welding

Procedure

Any*Any*Any*EN 15614-1Welding

Procedure

Test

Execution ClassreferenceQualification

Method

Method of Qualification of Welding Procedure

* S460M requires renewal of weld test qualificationdepending on the manufacturer’s job records regarding S460M.

Clause 7.4 in EN 1090-2

S460M or higher grade


Typical Sources of unacceptable resultsTypical Sources of unacceptable results

Typical sources of Unacceptable results / defects

XXToughness

XXToughness

Strength

Strength

InsufficientMechanicalProperties

XSlug Inclusion

XXLack of Fusion

XXBlow hole

X (fig.2)XXCold-cracking

XXSolidification

Cracking

ParentMetal(HAZ)

WeldMetal

Lamellar Tear

XX

XX

X (fig.1)X (joint detail)

Parent MetalConsumablesWeld

ConditionsWorkmanship

Types of unacceptable results/ defect

Fig.1 Lamellar Tear Fig.2 Cold Cracking


Lamellar TearLamellar Tear

Factors affecting crack initiation・・・・Restraining Degree of Weld joint※Weld test specimen is lightly-restrained in general, and less susceptible to cold crack.

・・・・Through Thickness Prop. of Parent Metal⇒⇒⇒⇒Select proper Z-value & Sulphur Cont.

24S=50mm

Aeff=15mm

Light-Rest.

21S=50mm

Aeff=15mm

Light-Rest.

Z_reqDimensionsJoin Type

30

20

10

Z

0 0.01 0.02sulphur content (%)

Required Z-value per EN1993-1-10 Recommended max. sulphur content

S

Aeff

SAeff

Reference: EN1011-1

0.005


Cold CrackCold Crack

Factors affecting crack initiation・・・・Hydrogen content of Weld joint※normally introduced by electrode and/or flux.

・・・・Chemical Comp. of Parent Metal: Cev

・・・・Restraining degree of Weld joint※Rigidly-restrained condition

represent high crack susceptibility

Lightly-restrained condition Rigidly-restrained condition


Mechanical Properties in Mechanical Properties in HHeateatAAffectedffectedZZoneone

0

100

200

300

400

0 100 200 300 400

Charpy Impact Energy_parent metal (J)

Cha

rpy

Impa

ct E

nerg

y_H

AZ

(J)

Test ConditionParent Metal: JIS SN490Welding Type: GMAW(CO2)Electrode: JIS YGW-18Heat Input: ≦40kJ/cm

ReferenceKojima et al: Effect of Chemical Compositions on the HAZ toughness and Its formulation under simulated column-beam connection welding of structural steel for building,STEEL CONSTRUCTION ENGINEERING, 2001.12

Weld MetalHAZ

Sampling location

Charpy Impact Values in HAZ can vary due to chemical composition of parent metal etc.


Weld Test Results of JFE/S460M Steel PlateWeld Test Results of JFE/S460M Steel Plate

LB-62Electrode

N/Ashielding

≦≦≦≦250℃℃℃℃

20kJ/cm

0 ℃℃℃℃

JFE-S460M – t50mmParent metal

Int Temp

Heat Imp.

Preheat

CO2shielding

CSF-81K2CElectrode

≦≦≦≦250℃℃℃℃

20kJ/cm

0 ℃℃℃℃

JFE-S460M – t50mmParent metal

Int Temp

Heat Imp.

Preheat

SMAW FCAW


Weld Test Results of JFE/S460M Steel PlateWeld Test Results of JFE/S460M Steel Plate

CriteriaTested valueitem

(Weld Metal) -20℃℃℃℃

213/220/188

(HAZ) -20℃℃℃℃

190/203/188

636

637

≦≦≦≦250℃℃℃℃

20kJ/cm

LB-62

S460M – t50mm

Single V

Test Results

Welding Condition &

Parent

Metal

Groove

Int Temp

Heat Imp.

Electrode

Impact

Test

(J)

Tensile

Strength

(N/mm2)

40≦≦≦≦

＠＠＠＠-20℃℃℃℃

530≦≦≦≦


ConclusionConclusion

●●●● S460M plate is one of the most effective materials both in reducing member size

& in simplifying fabrication & on-site job.●●●● Design Practices ⇒⇒⇒⇒ simply follow the Eurocode●●●● Fabrication Practices①①①①Weld Consumables

⇒⇒⇒⇒ Choose appropriate welding consumables ②②②② Parent Materials (plates)

⇒⇒⇒⇒ Choose appropriate parent metal by checking the three keys factors.・・・・Sulfer contents : ≦≦≦≦ ex. 0.005・・・・Cev : ≦≦≦≦ ex. 0.43 ・・・・HAZ properties : check weld test record!

JFE STEEL are happy to support customers to prepare their own WPSby providing sample plate etc for their WPS qualification test.

24

Copyright © 2014 JFE Steel Corporation. All Rights Reserved.

Any reproduction, modification, translation, distribution, transmission, uploading of the contents of the document, in whole or in part, is strictly prohibited

KOJI Okie-mail:[email protected] / Phone:+81-3-3597-3567

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