SAE-J1392

SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.TOPLACEADOCUMENTORDER:[phone]FAX:[phone]SAEWEBADDRESS(R)Steel,HighStrength,HotRolledSheetandStrip,ColdRolledSheet,andCoatedSheet1NOTE1—Thisdocumentshallnotbeusedonnewdesigns—SupersededbySAEJ2340.NOTE2—NOTE—High-strength,low-alloySheetandStripproductsformerlywereincludedinSAEJ410c(Cancelled),butarenowdetailedinthisseparateSAERecommendedPractice.1.Scope—ThisSAERecommendedPracticecoverssevenlevelsofhighstrengthcarbonandlow-alloyhotrolledsheetandstrip,coldrolledsheet,andcoatedsheetsteels.Thestrengthisachievedthroughchemicalcompositionandspecialprocessing.2.References2.1ApplicablePublications—Thefollowingpublicationsformapartofthespecificationtotheextentspecifiedherein.Unlessotherwiseindicated,thelatestrevisionofSAEpublicationsshallapply.2.1.1SAEPUBLICATIONS—AvailablefromSAE,400CommonwealthDrive,Warrendale,PA15096-0001.SAEJ410c(Cancelled)—HighStrength,LowAlloySteelSAEJ2340—CategorizationandPropertiesofDentResistant,HighStrength,andUltraHighStrengthAutomotiveSheetSteel2.1.2ASTMPUBLICATIONS—AvailablefromASTM,100BarrHarborDrive,WestConshohocken,PA19428-2959.ASTMA308—SpecificationforSteel,Sheet,Cold-Rolled,LongTerneCoatedASTMA370—TestMethodsandDefinitionsforMechanicalTestingofSteelProductsASTMA463—SpecificationforSteelSheet,Cold-Rolled,Aluminum-CoatedTypeIandTypeIIASTMA568—SpecificationforGeneralRequirementsforSteel,CarbonandHigh-StrengthLow-AlloyHot-RolledSheetandCold-RolledSheetASTMA568M—SpecificationforGeneralRequirementsforSteel,Carbon,andHigh-StrengthLow-AlloyHot-RolledSheetandCold-RolledSheet(Metric)ASTMA591—SpecificationforSteelSheet,ElectrolyticZinc-Coated,forLightCoatingMassApplicationsASTMA924—StandardSpecificationforGeneralRequirementsforSteelSheet,Metallic-CoatedbytheHot-Dip-Process1.ThevaluesstatedinU.S.customaryunitsaretoberegardedasthestandardrecommendedpractice.SAEJ1392RevisedFEB2001-2-3.Introduction—HighstrengthsteeldiscussedinthisdocumentinvolveshotrolledsheetandstripandcoldrolledsheetasdimensionallydescribedinASTMA568(A568M)latestrevision(Steel,CarbonandHigh-StrengthLow-AlloyHot-RolledSheet,Hot-RolledStripandCold-RolledSheet,GeneralRequirements).Italsoincludescoatedsheet,thatis,sheetcoatedbyhotdipping,electroplating,orvapordepositionofzinc,terne,aluminum,andorganiccompoundsnormallyappliedbycoilcoating.PublicspecificationsrelatedtothesecoatedproductsarethelatestrevisionsofASTMA924(SteelSheet,Zinc-Coated(Galvanized)bytheHot-DipProcess,GeneralRequirements),A591(SteelSheet,ColdRolled,ElectrolyticZinc-Coated),A463(SteelSheet,Cold-Rolled,Aluminum-CoatedType1),andA308(Steel,Sheet,Cold-Rolled,LongTerneCoated).Thestrengthisachievedthroughchemicalcompositionandspecialprocessing.Specialprocessingincludesmechanicalrollingtechniques,andtemperaturecontrolinhotrollingandsubsequentheattreatments.Theprimaryuseofhighstrengthsteelisbasedontheincreasedyieldandtensilepropertieswhicharehigherthanthoseofconventionalsheetandstripforwhichminimummechanicalpropertiesarenotnormallyspecified.Thesevenstrengthlevelsare240(35),280(40),310(45),340(50),410(60),480(70),and550(80)MPa(ksi)minimumyieldstrength.Differentchemicalcompositionsarenormallyusedtoachievethespecifiedmechanicalproperties.Thesecompositionsaresignificantlydifferentatthesamestrengthleveldependingonadditionalmaterialrequirements,thatis,weldability,formability,toughness,fatiguelife,atmosphericcorrosionresistance,andeconomics.Thecorrecttypeofhighstrengthsheetorstripshouldbespecifiedtoestablishcompatibilityoftheproducers'chemicalcompositionwiththefabricationandapplicationrequirements.Becausehighstrengthsteelischaracterizedbyspecialmechanicalproperties,consultationofproduceranduseringradeselectionisrecommendedtoinsurecompatibilityofthestrengthandformingrequirements.Caremustbetakenindesigningparts,tooling,andfabricationprocessestoobtainthegreatestbenefitfromthehighstrengthsheetandstripsteels.Itisadvisablethatthepurchaserfurnishinformationtotheproducerrelatingtheindividualrequirementsofanidentifiedpart;thismaybeaccomplishedbyvisualexaminationofthepart,byprints,throughadescription,oracombinationofthese.Also,itishighlydesirablefortheproducertoobservethefabricatingpractices,oratleastbeprovidedwithadetaileddescriptionoftheoperations.Thesteelsdiscussedinthisdocumentarecharacterizedbytheirspecialmechanicalpropertiesachievedthroughchemicalcompositio