MS.90028-20140923-碳钢、合金钢微合金化钢管材-eng

AuthorDepartmentFCAUS--METALLICMATERIALS-810WlDllaceogasogaacu-.wu.@fcagropcom

Co-AuthorDepartmentFCAITALY--PMATERIALLABRS(RANENRIOentcomorga..c

CARBON,ALLOYANDMICROALLOY

STEELBAR,BILLET,BLOOM,ROD,WIREANDSEAMLESSMECHANICALTUBING

MS.90028<S>FiatClass:CMD

CGDoc.Type:MS

Page:1/53

Date:23-SEP-2014

HARMONIZEDDOCUMENT

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30-JUL-2014

Initialrelease.ThisnewharmonizedmaterialspecificationreplacesMS-BAR<S>,MS-997andFGC9.50230

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MS-13378hasbeenaddedtotables3and5,andAnnexCtocovertheadditionof30MnVS6MOD

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TABLEOFCONTENTS

1GENERAL 4

1.1Purpose 4

1.2CoverageofthisStandard 5

1.3DrawingDesignation 7

1.4CarbonSteels 7

1.5AlloySteels 7

1.6MicroalloySteels 7

2REFERENCES 8

3DEFINITIONS/ABBREVIATIONS/ACRONYMS/SYMBOLS 9

4CORRELATIONTOOTHERSTANDARDS 9

5REGULATEDSUBSTANCES&RECIBLABILITY 12

6MATERIALCHARACTERISTICS 12

6.1SteelmakingPractices 12

6.1.1Melting 12

Strand(Continuous)Cast 12

IngotCast 13

6.2De-oxidationPractice(TypeofSteel) 14

6.2.1CarbonSteel 14

6.2.2AlloySteel 14

7CHEMICALCOMPOSITION 14

7.1General 14

7.2MiscellaneousCharacteristics 15

7.2.1GrainRefining 15

7.2.2Machining 15

7.2.3Fatigue 16

7.2.4MicroalloyedSteels 16

7.3ResidualChemicalElements 16

7.4ColdShearing 17

7.5Restrictions 18

8PERFORMANCEREQUIREMENTSOFTHEMATERIAL 18

8.1GrainSize 18

8.2Hardenability 18

8.3MechanicalProperties 19

8.4Toughness 19

9QUALITY 19

9.1SteelQualityLevels 19

9.2Decarburization 20

9.3SurfaceDefects 20

9.4InternalCleanliness 20

9.5Miscellaneous 21

10SPECIALREQUIREMENTS 21

10.1SteelforAxleShafts 21

10.2SteelforGears,PinionsandShafts 23

10.3SteelsMadetoSpecialCleanlinessRequirementsIncludingVacuumDegassed,Aircraftand/or

MagneticParticleInspectionandHighorLowCarbonBearingQualityGrades 23

10.4SteelforChassisSuspensionCoilandLeafSprings 23

10.5SteelforStabilizerBarApplications 24

10.6Fasteners 25

10.7ForgedComponents 26

10.8HighCarbonChromiumAlloyBallandRollerBearings 27

11APPROVEDSOURCELIST 28

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AnnexA

..................................................................

35

CarbonSteel–ChemicalCompositions

35

AnnexB

41

AlloySteel–ChemicalCompositions

41

AnnexC

46

MicroalloySteel–ChemicalCompositions

46

AnnexD......................................................

FiatSteel–ChemicalCompositions

48

48

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1GENERAL

1.1Purpose

ThisstandardcoverstherequirementsforthebasicbarproductmadefromcarbonandalloysteelfurnishedtoChryslerGroupLLC,Fiatortheirsuppliersintheformof:

A.Bars(hotrolledorcoldfinished)

B.Semi-finishedproduct(hot-rolled)

C.Rodsorcoarseroundwire(hotrolled)

D.Seamlesstubing(hotrolledorcoldfinished)

ThematerialwillbefabricatedbyChryslerGroupLLC,Fiatorbytheirsupplierintovariousautomotiveandlightdutytruckcomponents.Thisstandardisnotintendedtobeusedforcommercialtruckornon-automotiveheavyequipmentapplications.Thefabricationprocesseswillencompassavarietyofmanufacturingoperationssuchas:cold,warmandhotforming(asshowninTable1);machining;welding;thermalandsurfacetreatments.ThematerialinthefinalcomponentformhastosatisfyfunctionalcomponentrequirementsasdefinedbyChryslerGroupLLCorFiatEngineeringandactualvehicleservice.Aspecificqualitylevelclassificationshallbeassignedtothesteelbarapplication(e.g.bearingquality,axleshaftquality,etc.),ifapplicable.Intheeventthatnewsteelsourcesareunderconsiderationforbarproducts,theuseoftheChryslerGroupLLC“SteelMillMetallurgicalSurvey”(CEP-032)shouldbeusedtoassessthecapabilityofthemillsourcetomeetallqualitystandardsandmetallurgicalrequirementsasdefinedbyChryslerGroupLLCorotherapplicablestandards.Qualificationmayalsoincludetheneedforametallurgicalassessment(CEP-033)orasdefinedbytheChryslerGroupLLCand/orFiatMaterialsEngineeringDepartmentorperproductdesign/evaluationcriteria.

Table1-ProcessGuidelinesforBarandRodProduct

PRODUCT

FORM

TEMPERATURE

RANGE

SURFACECONDITION

HEATTREATMENT

Bar

Round

Hot

As–rolled

As-rolled

Annealed

IsothermalAnnealed

SpheroidizeAnnealed

Normalized

Quenchand

Tempered

Drawn

Peeled

Polished

Ground

Straightened

ShotBlasted

Pickled

Cold

Drawn

Hex

Hot

As-rolled

Straightened

Pickled

ShotBlasted

Cold

Drawn

Square

Hot

As-rolled

Straightened

Pickled

ShotBlasted

Cold

Drawn

Flat

Hot

As-rolled

Straightened

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Table1-ProcessGuidelinesforBarandRodProduct

Pickled

ShotBlasted

Cold

Drawn

WireRod

Round,Flat,

Square,Hex

Hot

As-rolled

As–rolled

Annealed

SpheroidizeAnnealed

Cold

Drawn

Annealed

SpheroidizeAnnealed

1.2CoverageofthisStandard

Thisstandardcoversthesteelmakingandde-oxidationpractices,chemicalcomposition,cleanlinessandqualitylevels,hardenabilityandadditionalrequirements,whereapplicable,forbasiccarbonandalloysteelslistedinTables2,3and4.Productshallcomplywiththerequirementsofthisstandardandtothestandardsrelatingtotheindividualsteelgrades,asspecifiedforeitherChryslerGroupLLCand/orFiat.

Table2-CarbonSteels(SAE/AISIGradeCrossReferencetoMaterialStandardNumbers)

SAE

GRADE

MS.90028

SAE

GRADE

MS.90028

SAE

GRADE

MS.90028

SAE

GRADE

MS.90028

1006

501

1042

3105

11V37

10480

1526

4049

1008

501

1043

514

1138

2906

1527

908

1010

420,501,

573

1045

434

1140

2510

1541

3049

1015

388

1046

466

1141

405

15V41

12162

1016

301

1050

389,4925

11V41M

10481

1548

4974

1018

2485

1053

4308

11V41

10913

1566

498

1020

210,973

1060

402,3323

1144

2282

10B18

5378

1022

335

1065

3179

1146

329

10B21

5378

1025

3086

1070

2015

1151

3357

10B22

5378

1026

1917

1080

375

11V51

10482

15B22

5378

1029

2703

1090

2130

1211

404

15V32M

10912

1030

410

1095

371

1212

200,573,

898

15B48

4375

1033

4048

1108

2717

1213

573,760.

898

15B62

5463

1034

467

1109

2717

1215

573,760,

898

1035

467

1110

2717

12L14

573,898,

3395

1037

2934

1117

738

12Bi14

10432

1038

513,4773

1118

212

1518

5764

1039

3292,4297

1126

2011

1522

3493

1040

331

1137

289,4554

1524

3339

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Table3-AlloySteels(SAE/AISIGradeCrossReferencetoMaterialStandardNumbers)

SAE

GRADE

MS.90028

SAE

GRADE

MS.90028

SAE

GRADE

MS.90028

SAE

GRADE

MS.90028

1335

308

4142H

12178

5150

473

92V54

9779

1541M

9777

4145

208

5155

3215

9259

8175

4023

291

4150

366

5160

3051,3415

92V59M

9781

4024

227

4320

7047

6150

381

9310

7683

4027

277

4340

364

AMS6418

4181

94B15

7580

EX33/4027

5745

4615

915

8115

3159

50100

3286

4028

234

4620

419

8615

7774

51100

3286

4032

271

4720

3459

8617

2361

52100

805,3286

4037

269

4815

211

8620

3103,3104

52100

805,3286

4042

267

5046

3176

8620MOD

11721

C70S6

10431

4047

263

50B46

7527

8630

2247

S38MS1V

9178

4118

6668

5060

3692

8637

2286

C36MnVS4

11082

4121M

9668

5120

472

8640

2249

S40MS1V

10804

4130

459

5130

6998

8720

2168

S45CVMn

12163

4135

7227

5132

221

8822H

11243

16MnCr5

12164

4137

465

5135

349

92V45

9780

20MoCr4

11378

4140

374

5140

362

9254

10803

46MnVS6

12661

30MnVS6

MOD

13378

Table4-SteelGradeCrossReferencetoFiatMaterialStandardNumbers

FIATGRADE

FIAT

STANDARD

FIATGRADE

FIAT

STANDARD

FIATGRADE

FIAT

STANDARD

FIATGRADE

FIAT

STANDARD

15NiCr11

52123

18NiCrMo5

52429

48MnV3

52543

10S20

52606

C15

52403

C20

52430

38MnSiVS6

52543

10SPb20

52606

16CrNi4

52404/01

17Cr3

52431/01

38MnSiVS6A

52543

35S20

52606

C10

52405

C53

52501

36MnVS4

52543

45S20

52606

16CrNi4

20CrNi4

52407/01

C33

52503

25CrMo4

52544

60S20

52606

12NiCr3

52409

C30

52505

C72

52554

35SMn10

52606

27MnCr5

52414

C40

52505

55Si7

52566

35SMnPb10

52606

52110/08

20MnCr5

52414/01

41Cr4

52514

60Si7

52566

40SMnPb10

52606

20NiCrMo2

52417

35CrMo4

52516

55Cr3

52566

C16BKD

52611

16NiCrMo2

52419/01

40CrMo4

52517

60SiCr8

52566

C22BKD

52611

16CrMo4

52420

30CD4

52518

54SiCrV6

52566

22Mn4B

52611

18NiCrMo7

52421

40NiCrMo4

52520

60SiCrV7

52566

C35BKD

52611

16NiCrMo12

52422

40NiCrMo7

52527/01

9SMn28

52606

100Cr6

52670

19MnCr5

52423

40NiCrMo2

52534

9SMnPb28

52606

100CrMn4

52670

17NiCrMo2

52427

9SMn35

52606

100CrMn7

52670

16MnCr5

52428

25MC6

52541

9SMnPb35

52606

52110/08

C12

52808

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1.3DrawingDesignation

TheUnifiedNumberingSystem(UNS)isbeingincorporatedintothisstandardtoprovideinformationrelativeONLYtothebasicchemicalcomposition.Itdoesnotdifferentiatechemistrychangessuchas“Carbon,ManganeseorSiliconModifications.”AdditionalinformationcanbefoundinASTME527.Intheeventofagrademodificationortheadditionofanon-standardgradedesignation,thechemicalcomposition,hardenabilityrangeorotherspecificrequirementsshouldbelistedontheappropriateproductdrawing(s).

1.4CarbonSteels

DrawingswillnecessitatespecifyingtheChryslerGroupLLC“MS”asshowninTableA-1withthepropersuffixtoindicatethetypeofsteelandgrainsizerequired.SteelgradesusedbyFiatasshowninTableD-1willbedesignatedbyanISOgradedesignationandthecorrespondingfive(5)digitinternalFiatstandard.ThestandardwilllistanyotherrequirementsthatareuniquetothegradeandarenotcoveredbyMS.90028.

Forexample:

-MS-212ANORESTRICTIONONTYPEOFSTEELORGRAINSIZE

-MS-212BSTEELSHALLBEKILLEDANDFINEGRAINED

Alettersuffixmayalsobeusedtodenoteavariationunderaspecificgradeorseriesofgrades,asneeded.

1.5AlloySteels

Drawings,withoneexception,willrequireonlythedesignationoftheChryslerGroupLLC“MS.”Theexception,MS-3286,willnecessitatethepropersuffixA,BorCtoindicatethedesiredindividualgradeofsteelasdefinedinTableB-1.SteelgradesusedbyFiatasshowninTableD-1willbedesignatedbyanISOgradedesignationandthecorrespondingfive(5)digitinternalFiatstandard.ThestandardwilllistanyotherrequirementsthatareuniquetothegradeandarenotcoveredbyMS.90028.

1.6MicroalloySteels

DrawingswillnecessitatespecifyingtheChryslerGroupLLC“MS”asshowninTableC-1withtheproperdesignationtoindicatethetypeofmicroalloymodification.Anexampleofthedesignationisasfollows;11V41representsavanadiummodificationtothestandardgrade.Becausemostmicroalloysteelshavepropertiesthatarenotdevelopedthroughtheuseofheattreatment,boththechemicalmodificationandthemechanicalpropertiesshouldbelistedonthepartdrawing.Themicrostructureandhardnessthatisdevelopedthroughtheuseofcontrolledcoolingfromtheforgingoperationmayaffectsubsequentpartprocessing,machinabilityorfinishedproperties.Requirementsrelatedtohardnessandmicrostructuralcharacteristics(e.g.acicularityormixedmicrostructures)mayalsobeconsideredandlistedonthepartdrawing.SteelgradesusedbyFiatasshowninTableD-1willbedesignatedbyanISOgradedesignationandthecorrespondingfive(5)digitinternalFiatstandard.ThestandardwilllistanyotherrequirementsthatareuniquetothegradeandarenotcoveredbyMS.90028.AdditionaldetailsrelatedtoFiatspecificapplicationsareprovidedinFiatStandard52543.

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2REFERENCES

Table5-References

Chrysler

Standards

Chrysler

Standards

Chrysler

Standards

ASTM

Standards

SAE

Standards

Fiat

Standards

CEP-032

MS-291

MS-459

ASTMA29/A29M

SAEJ409

50201

CEP-033

MS-2934

MS-465

ASTMA108

SAEJ412

50261

CS-9801

MS-301

MS-466

ASTMA255

SAEJ419

52110/08

CS-12534

MS-3049

MS-467

ASTMA295/A295M

SAEJ1081

52123

MS-10431

MS-3051

MS-472

ASTMA304

SAEJ1086

52403

MS-10432

MS-308

MS-473

ASTMA322

SAEJ1249

52404/01

MS-10480

MS-3086

MS-4773

ASTMA485

SAEJ1868

52405

MS-10481

MS-3103

MS-4925

ASTMA510/510M

52407/01

MS-10482

MS-3104

MS-4974

ASTMA519

52409

MS-10803

MS-3105

MS-498

ASTMA534

52414

MS-10804

MS-3159

MS-501

ASTMA575

52414/01

MS-10805

MS-3176

MS-513

ASTMA576

52417

MS-10806

MS-3179

MS-514

ASTMA689

52419/01

MS-10912

MS-3215

MS-5378

ASTMA711/A711M

52420

MS-10913

MS-3286

MS-5463

ASTMA510/A510M

52421

MS-11082

MS-329

MS-5745

ASTMA866

52422

MS-11243

MS-3292

MS-5764

ASTMA892

52423

MS-11378

MS-331

MS-5765<S>

ASTMA909/A909M

52427

MS-11721

MS-3323

MS-6668

ASTMA920/A920M

52428

MS-12162

MS-3339

MS-6790<S>

ASTMA921/921M

52429

MS-12163

MS-335

MS-6998

ASTME8

52430

MS-12164

MS-3357

MS-7047

ASTME8/E8M

52431/01

MS-12178

MS-3395

MS-7094

ASTME23

52501

MS-12661

MS-3415

MS-7227

ASTME45

52503

MS-13378

MS-3459

MS-738

ASTME112

52505

MS-1917

MS-3466

MS-7527

ASTME381

52514

MS-200

MS-349

MS-7580

ASTME527

52516

MS-2011

MS-3493

MS-760

ASTME1077

52517

MS-2015

MS-362

MS-7683

ASTMF2282

52518

MS-208

MS-364

MS-7774

52520

MS-210

MS-366

MS-805

52527/01

MS-211

MS-3692

MS-8175

52534

MS-212

MS-371

MS-898

52541

MS-2130

MS-374

MS-908

52543

MS-2168

MS-375

MS-915

52544

MS-221

MS-381

MS-9178

52554

MS-2247

MS-388

MS-9668

52566

MS-2249

MS-389

MS-973

52606

MS-227

MS-402

MS-9777

52611

MS-2282

MS-404

MS-9778

52670

MS-2286

MS-4048

MS-9779

52808

MS-234

MS-4049

MS-9780

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Table5-References

Chrysler

Standards

Chrysler

Standards

Chrysler

Standards

ASTM

Standards

SAE

Standards

Fiat

Standards

MS-2361

MS-405

MS-9781

MS-2485

MS-410

MS-STEEL<S>

MS-2510

MS-4181

PF-SAFETY<S>

MS-263

MS-419

PS-5657<S>

MS-267

MS-420

PS-6752

MS-269

MS-4297

PS-6850<S>

MS-2703

MS-4308

PS-9500<S>

MS-271

MS-434

MS-2717

MS-4375

MS-277

MS-4554

MS-289

MS-2906

Other

ISO6892-1

3DEFINITIONS/ABBREVIATIONS/ACRONYMS/SYMBOLS

Thefollowingacronyms/abbreviationsusedinthetextofthisstandardaredefinedasfollows:

AISI:AmericanIronandSteelInstitute

ASL:ApprovedSourceList

ASTM:AmericanSocietyforTestingandMaterials

BOF:BasicOxygenFurnace

CE:CarbonEquivalent

DI:IdealCriticalDiameter

EAF:ElectricArcFurnace

EMS:Electro-MagneticStirring

MS:MaterialStandard

PF:PerformanceStandard

PPM:PartsPerMillion

PS:ProcessStandard

RH:RestrictedHardenability

SAE:SocietyofAutomotiveEngineers

UNS:UnifiedNumberingSystem

VAR:VacuumArcRe-melting

4CORRELATIONTOOTHERSTANDARDS

IndustrydocumentationprovidingdataonthematerialsshowninthisstandardaredocumentedinTable6forAmericanSocietyforTestingandMaterials(ASTM),Table7forSocietyofAutomotiveEngineers(SAE)andTable8forInternationalOrganizationStandards(ISO).

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Table6-AmericanSocietyforTestingandMaterials(ASTM)Standards

IndustryStandard

StandardNo.

SpecificationforSteelBars,CarbonandAlloy,HotWroughtandColdFinished,GeneralRequirements

A29/A29M

SpecificationforSteelBars,Carbon,Cold-Finished,StandardQuality

A108

StandardTestMethodsforDeterminingHardenabilityofSteel

A255

SpecificationforHighCarbonBallandRollerBearingSteel

A295/A295M

SpecificationforAlloySteelBarsSubjecttoEnd-QuenchHardenabilityRequirements

A304

SpecificationforSteelBars,Alloy,StandardGrades

A322

StandardSpecificationforHighHardenabilityAntifrictionBearingSteel

A485

SpecificationforGeneralRequirementsforWireRodsandCoarseRoundWire,CarbonSteel

A510/A510M

SpecificationforSeamlessCarbonandAlloySteelMechanicalTubing

A519

SpecificationforCarburizingSteelsforAnti-FrictionBearings

A534

SpecificationforSteelBars,Carbon,MerchantQuality,M-Grades

A575

SpecificationforSteelBars,Carbon,Hot-Wrought,SpecialQuality

A576

StandardSpecificationforCarbonandAlloySteelBarsforSprings

A689

SpecificationforCarbonandAlloySteelBlooms,BilletsandSlabsforForging

A711/A711M

StandardSpecificationforMediumCarbonAnti-FrictionBearingSteel

A866

StandardGuideforDefiningandRatingtheMicrostructureofHighCarbonBearingSteels

A892

SpecificationforSteelForgings,Microalloy,forGeneralIndustrialUse

A909/A909M

StandardSpecificationforSteelBars,Microalloy,HotWrought,SpecialQuality,MechanicalProperties

A920/A920M

StandardSpecificationForSteelBars,Microalloy,HotWrought,SpecialQuality,ForSubsequentHotForging

A921/A921M

TensionTestingofMetallicMaterials

E8

TensionTestingofMetallicMaterials(Metric)

E8/E8M

StandardTestMethodsforNotchedBarImpactTestingofMetallicMaterials

E23

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Table6-AmericanSocietyforTestingandMaterials(ASTM)Standards

IndustryStandard

StandardNo.

StandardTestMethodsforDeterminingtheInclusionContentofSteel

E45

StandardTestMethodsforDeterminingAverageGrainSize

E112

StandardMethodofMacroetchTestingSteelBars,Billets,BloomsandForgings

E381

StandardPracticeforNumberingMetalsandAlloys

E527

StandardTestMethodsforEstimatingtheDepthofDecarburizationofSteelSpecimens

E1077

StandardSpecificationforQualityassuranceRequirementsforCarbonandAlloySteelWire,RodsandBarsforMechanicalFasteners

F2282

Table7-SocietyforAutomotiveEngineers(SAE)Standards

IndustryStandard

StandardNo.

GeneralCharacteristicsandHeatTreatmentsofSteels

J412

ProductAnalysis-PermissibleVariationsfromSpecifiedChemicalAnalysisofaHeatorCastofSteel

J409

MethodsofMeasuringDecarburization

J419

PotentialStandardSteels

J1081

NumberingMetalsandAlloys

J1086

FormerSAEStandardandFormerSAEEX-Steels

J1249

RestrictedHardenabilityBandsforSelectedAlloySteels

J1868

Table8-InternationalStandardsOrganization(ISO)Standards

IndustryStandard

StandardNo.

MetallicMaterials–TensileTesting

ISO6892-1

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5REGULATEDSUBSTANCES&RECIBLABILITY

Steelproductistobemanufacturedaccordingtoacceptablemethodsformelting,processingand/orpreparationforshipmenttocustomers.Thesteelisnottobeexposedtomercuryoranyothermetalalloythatisliquidatambienttemperaturesonsiteatthesteelmilllocationand/orduringprocessing.SteelproductistomeetallFederal,Stateand/orlocalenvironmentalregulationspriortosupplytoChryslerGroupLLCorFiat.

Scrapthatistoberecycledforuseinthemanufactureofsteelproductsshallbecheckedforradioactivity.

6MATERIALCHARACTERISTICS

6.1SteelmakingPractices

Intheeventofanychangestothesteelprocessing(i.e.castingpractice.ladletreatment,rollingpractices,etc.)orsourcechanges,notificationshallbemadetotheusingplant,theappropriatedesign/platformengineeringcontactandmaterialsengineering.Documentationofsuchchangesshallbemadeinaccordancetoallqualitystandards/requirementsandmayrequirevalidationtestingpriortoapproval.

6.1.1Melting

Industrialpracticeusingthebasicoxygen(B.O.F)andelectricfurnace(E.A.F)processesareapproved.UseofanyotherprocessornewtechniquerequirestheapprovalofChryslerGroupLLCand/orFiat,VehicleEngineeringandMaterialsEngineering.SincetheuseofferrousscrapisintegraltothechargeinboththeB.O.F.andE.A.F.processes,onlyprimeor#1scrapistobeusedinE.A.F.chargeswhereastheB.O.F.canuseacombinationofprimeandlowergradescrapaslongasthescrapchargemeetstheintendedqualitylevelorcustomerrequirementsforthesteelgradeproduced.Thescrapshallbecheckedforradioactivitypriortodispositionwithinthesteelmakingfacility.Aheatlotofsteelisdefinedastheproductofthemeltthatoriginatedfromasinglebatchofsteelfromadedicatedfurnaceandwhencastshallbeassignedauniqueidentificationnumber/code.Allblooms,billets,bars,tubeorrodineithercutlengthsorcoilshallretainauniqueheatidentificationfortraceabilitypurposes.

Strand(Continuous)Cast

Certainsteelmillshavefullapprovaltosupplysteelbars,billets,bloomsandseamlessmechanicaltubingprocessedfromcontinuouscastorasflexcastproductattheiroptionandareidentifiedintheEASLunderSection11withan“A”suffix.

UseofstrandcastproductsfromanyothersteelmillforanyChryslerGroupLLCand/orFiatcomponentrequirestheapprovaloftheChryslerGroupLLCand/orFiat,MaterialsEngineeringasshownontheEASLunderSection11witha“B”suffix.

Thereisnorestriction,noranEASL,ontheuseofstrandcaststeelforrodandwireproducts.This,however,doesnotrelievepartsuppliersoftheresponsibilityforpurchasingandusingsteelthatmeetstheapplicablerequirementsorintentofthisstandardandissuitablefortheintendedcomponent.

Existingcontinuouscastfacilitiesexhibitawiderangeofequipmentandcapabilitiesandareevaluatedonanindividualbasis.TherearecertaingenericminimumrequirementsthatapplytoallapplicationsasshowninTable9.

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Table9-ContinuousCastingRequirements

A

Aminimumreductionratioof7:1fromtheas-castsectionsizetotheas-orderedproductsize.Examinationofarepresentativecrosssectionoftherolledbarshallnotexhibitanyevidenceoftheascaststructure.DeviationsfromthisrequirementtolowerreductionratiosshallbesubjecttoreviewandapprovalbytheappropriaterepresentativesfromChryslerGroupLLCand/orFiatMaterialsEngineering.

B

Protectionofthemoltensteelfromre-oxidationintheladle,tundishandmold.

C

Shrouding(mechanicalorgaseous)fromladletotundishandfromtundishtomold.

D

Utilizeatundishwithsufficientcapacitytoprecludevortexingandprovideadequateresidencetimefortheflotationofinclusions/oxides.

E

Consistentmoldlevelcontrolofmoltensteel

F

Minimumdegreeofsuperheat(temperaturedifferencebetweensteelliquidusattappingandthepouringtemperature).

G

Adequatemoldoscillation,controllablecastingspeedandstrandcoolingcapability.

H

Heatlottraceabilityandstrandsequenceidentification.

Formorecriticalordemandingapplications,fromeitherafunctionalorfabricationaspect,additionalcapabilitiesmaybenecessary.Suchprocessingmayincludeelectromagneticstirring(EMS)ofthemoltensteelinthemoldand/orjustbelowthemold,automaticmoldlevelcontrol,abilitytoaddheattothemoltensteelintheladleand/ortundish,inadditiontoprocedurestoremoveand/orfloatoutinclusionssuchasargonstirring/bubbling,ladledegassingandincreasedresidencetimeinthetundishwiththeuseofweir’s/damsorfiltersinthetundish.

Althoughfeedingspecialwireintothemoldforpurposesofdeoxidation,grainsizecontrolandadditionofalloyingelementsisallowed,itisnotthepreferredmethodforachievingtheseendresults.Thepreferredmethodistohaveallthechemistry/chemicaladditionsmadeintheladlerefiningfurnaceorladlemetallurgystationpriortotappingthemoltensteelintothetundish.

TheuseofrotaryorhorizontalcontinuouscasterproductisnotprecludedbutshallbesubmittedforapprovalbyChryslerGroupLLCand/orFiatMaterialsEngineeringonanindividualcomponentbasisunlessindicateddifferentlyintheappropriateEASLproductorcomponentcategories.Thegenericcontinuouscasterrequirementsandattributesdescribedpreviouslypertain