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1、ThisinternationalstandardwasdevelopedinaccordancewithinternationallyrecognizedprinciplesonstandardizationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecommendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Com
2、mittee.Designation:A941−18StandardTerminologyRelatingto1Steel,StainlessSteel,RelatedAlloys,andFerroalloysThisstandardisissuedunderthefixeddesignationA941;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevisi
3、on.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scopeaging,n—achangeinthepropertiesofcertainsteelsthatoccursatambientormoderatelyelevatedtemperaturesafter1.1Thisstandardisacompilati
4、onofdefinitionsoftermshotworkingoraheattreatment(quenchaging,naturalrelatedtosteel,stainlesssteel,relatedalloys,andferroalloys.aging,orartificialaging)orafteracold-workingoperation1.2WhenatermisusedinanASTMdocumentforwhich(strainaging).CommitteeA01isresponsible,itisincluded
5、hereinonlywhenDISCUSSION—Thechangeinpropertiesisoften,butnotalways,duetojudged,afterreviewbySubcommitteeA01.92,tobeagener-precipitationhardening,butneverinvolvesachangeinthechemicalallyusableterm.compositionofthesteel.1.3Somedefinitionsincludeadiscussionsection,whichisallo
6、ysteel,n—asteel,otherthanastainlesssteel,thatamandatorypartofthedefinitionandcontainsadditionalconformstoaspecificationthatrequiresoneormoreoftheinformationthatisrelevanttothemeaningofthedefinedterm.followingelements,bymasspercent,tohaveaminimum1.4Definitionsoftermsspecifictoa
7、particularstandardwillcontentequaltoorgreaterthan:0.30foraluminum;0.0008appearinthatstandardandwillsupersedeanydefinitionsofforboron;0.30forchromium;0.30forcobalt;0.40foridenticaltermsinthisstandard.copper;0.40forlead;1.65formanganese;0.08formolyb-denum;0.30fornickel;0.06f
8、orniobium(columbium);0.601.5Thisinternationalstandardwasdevelopedinaccor-forsilicon;0.05fortitan