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ID:35613431
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时间:2019-04-01
《GB3098.1-82标准(英文版)》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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
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