GB3098.1-82标准（英文版）

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1、.NationalStandardofthePeople’sRepublicofChinaUDC621.882.2/.6:539.3GB3098.1-82(Confirmedin1988)Mechanicalpropertiesoffastenersbolts,screwsandstuds1.IntroductionThisstandardisidenticaltoISO898/1-1978MechanicalPropertiesofFasteners-PartOne:Bolts,Screwsa

2、ndStuds.Thisstandardisapplicabletoanyformofbolts,screwsandstudsmadeofcarbonsteeloralloysteelandwiththreaddiametersfrom3to39mm,whosethreaddimensionandtolerancearespecifiedaccordingtoGB193-81,GB196-81andGB197-81.Thisstandardisnotapplicabletosetscrewsan

3、dothersimilarthreadfastenerswithoutstatedtensilestrength.Thisstandarddoesnotspecifyrequirementsonmechanicalpropertieslikesolderability,corrosionstabilityandworkingtemperatureover+300°Corbelow-50°C.Note:①Forbolts,screwsandstudswhosethreaddiametersareg

4、reaterthan39mm,aslongastheirmechanicalpropertiesareinconformitywiththepropertyclassesofthisstandard,theycouldbemarkedaccordingtorelatedmarkingrules.②Bolts,screwsandstudsmadebyfreecuttingsteelcouldnotbeusedunderthetemperaturehigherthan+250°C.2.Normati

5、vereferenceGB193GeneralPurposeScrewThreads-DiametersandPitchesGB196GeneralPurposeScrewThreads-BasicDimensionGB197GeneralPurposeScrewThreads-ToleranceandFitGB231MetalBrinellHardnessTestMethodsGB230MetalRockwellHardnessTestMethodsGB4340MetalVickersHard

6、nessTestMethodsGB228MetalTensileTestMethodsGB229Charpy(Ugap)ImpactTestMethodGB5277FastenersBoltandScrewHoles3.MarkingsystemThemarkingsystemforpropertyclassesofbolts,screwsandstudsisshownastable1.IssuedbyChinaStateBureauofStandardson05-22-1982Implemen

7、tedon07-01-1983GB3098.1-82nominaltensilestrength300400500600700800900100012001400minimumelongationpercentage85%786．812．9910．9105．89．8128．814164．818205．6224．6253．630Table1propertyclassRelationshipbetweenyieldpointandtensilestrengthyield-tensileratio.6

8、.8.9nominalyieldpoint（σs）ornominalyieldstrength（σ0.2）×100%nominaltensilestrength（σb）608090Note:class9.8onlyappliestothreaddiameterssmallerthan16mm.Markingcodesforpropertyclassescontaintwopartsofnumbers,whichareseparatedby“.”.Thefirstpart(before“.”)is