文档介绍：'sRepublicofChinaGB/T228-2002eqvISO6892:1998Metallicmaterials-TensiletestingatambienttemperatureIssuedonMarch10,2002 implementonJuly1,2002IssuedbyGeneralAdministrationofQualitySupervision,InspectionandQuarantineofthePeople’sRepublicofChinaGB/T228-2002ContentsForeword…………………………………………………………………………………………IIIISOForeword…………………………………………………………………….………………IV1Scope…………………………………………………………………………………………..…12Normativereferences………………………………………………………………………….…13Principle……………………………………………………………………………….…….……14Definitions……………………………………………………………………………..…………l5Symbolsanddesignations…………………………………………………………………....…..56Testpiece…………………………………………………………………………………………67Determinationoforiginalcross-sectionalarea(So)………………………………………………78Markingtheoriginalgaugelength(Lo)…………………………………………..….……………uracyoftestingapparatus…………………………………………………….………………710Conditionsoftesting…………………………………………………………….………………811Determinationofpercentageelongationafterfracture(A)andpercentagetotalelongationatfracture(At)…………………………………………………………………………………………812Determinationofpercentagetotalelongationatmaximumforce(Agt)andpercentagenon-proportionalelongationatmaximumforce(Ag)………………………………………….……913Determinationofpercentageyieldpointextension(Ae)……………………………………...…914Determinationofupperyieldstrength(ReH)andloweryieldstrength(ReL)…...………………1015Determinationofproofstrength,non-proportionalextension(Rp)…………….………………1016Determinationofproofstrength,totalextension(Rt)…………………………..………………1117Methodofverificationofpermanentsetstrength(Rr)…………………………………………1118Determinationoftensilestrength(Rm)………………………………………….………………1l19Determinationofpercentagereductionofarea(Z)…………………………….………………1220Roundingoffofnumericalvaluesofpropertydeterminationresults…………….……………uracyofpropertydeterminationresults……………………………………………………1422Processingoftestresults……………………………………………………….………………1523Testreport………………………………………………………………………………………15AnnexA(normative)……………………………………………………