Designation:A1026–03StandardSpecificationforAlloySteelStructuralShapesforUseinBuildingFraming1ThisstandardisissuedunderthefixeddesignationA1026;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1ThisspecificationcoversGrades50[345]and65[450]alloysteel“W”shapes(rolledwideflangeshapes)intendedforuseinbuildingframing.Thissteelisalowcarbon,copper-containing,alloysteelwithabainiticmicrostructurethatisdevelopedthroughthecontrolofchemicalcompositionandtheuseofthermo-mechanicalrollingfollowedbyaircooling.Thecopperispresenttoenhanceprecipitationstrengthening.1.2Whenthesteelistobewelded,aweldingproceduresuitableforthegradeofsteelandintendeduseorserviceistobeutilized.SeeAppendixX3ofSpecificationA6/A6Mforinformationonweldability.1.3Theshapesarenotintendedtobegalvanizedortobepost-weldheattreatedattemperaturesexceeding750°F[400°C].1.4Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIvaluesareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemistobeusedindependentlyoftheother,withoutcombiningvaluesinanyway.1.5Thetextofthisspecificationcontainsnotesorfootnotes,orboth,thatprovideexplanatorymaterial;suchnotesandfootnotes,excludingthoseintablesandfigures,donotcontainanymandatoryrequirements.2.ReferencedDocuments2.1ASTMStandards:A6/A6MSpecificationforGeneralRequirementsforRolledStructuralSteelBars,Plates,Shapes,andSheetPiling2A673/A673MSpecificationforSamplingProcedureforImpactTestingofStructuralSteel23.GeneralRequirements3.1ProductfurnishedunderthisspecificationshallconformtotherequirementsofthecurrenteditionofSpecificationA6/A6Mfortheorderedproduct,unlessaconflictexists,inwhichcasethisspecificationshallprevail.4....
