Designation:A1077/A1077M−14StandardSpecificationforStructuralSteelwithImprovedYieldStrengthatHighTemperatureforUseinBuildings1ThisstandardisissuedunderthefixeddesignationA1077/A1077M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversalloysteelinbars,platesuptoandincluding4in.[100mm]inthicknessandshapesofstructuralqualitywithimprovedyieldstrengthathightem-perature.Twogrades,36[250]and50[345]areavailableforuseinboltedorweldedbuildingsorforgeneralstructuralpurposes.Class2requiresamaximumyieldtotensileratio–thisratioisnotrequiredforClass1.1.2Whenthesteelistobewelded,aweldingproceduresuitableforthegradeofsteelandintendeduseorserviceistobeutilized.SeeAppendixX3ofSpecificationA6/A6Mforinformationonweldability.1.3Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemistobeusedindependentlyoftheother,withoutcombiningvaluesinanyway.1.4Thetextofthisspecificationcontainsnotesorfootnotes,orboth,thatprovideexplanatorymaterial.Suchnotesandfootnotes,excludingthoseintablesandfigures,donotcontainanymandatoryrequirements.1.5Forstructuralproductsproducedfromcoilandfur-nishedwithoutheattreatmentorwithstressrelievingonly,theadditionalrequirements,includingadditionaltestingrequire-mentsandthereportingofadditionaltestresults,ofSpecifi-cationA6/A6Mapply.1.6Supplementaryrequirementsareprovidedforusewhereadditionaltestingoradditionalrestrictionsarerequiredbythepurchaser.Suchrequirementsapplyonlywhenspecifiedinthepurchaseorder.2.ReferencedDocuments2.1ASTMStandards:2A6/A6MSpecificationforGeneralRequirementsforRolledStructuralSteelBars,Plates,Shapes,andSheetPilingA370TestMethodsandDefinitionsforMechanicalTestingofS...
