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1、ICS77.140.10;77.140.50H46GBGBGBGBThenationalstandardofthePeople'sRepublicofChinaGB/T1591-2008substitutesGB/T1591-1994HighHighstrengthstrengthlowlowalloyalloystructuralstructuralsteelssteelsIssuedon06/12/2008Implementedon01/10/2009ByGeneralAdministrationofQuality
2、Supervision,InspectionandQuarantineofthePeople'sRepublicofChina(AQSIQ)andStandardizationAdministrationofthePeople'sRepublicofChinaGB/T1591-2008PrefaceThisstandardhasrevisedGB/T1951-1994HighstrengthlowalloystructuralsteelsinreferencetoEN10025:2004Structuralsteelh
3、ot-rolledproducts.ThisstandardhastakentheplaceofGB/T1591-1994Highstrengthlowalloystructuralsteels.ComparedwithGB/T1591-1994,changesinthisstandardareasfollow:——ithasexpandedthescopeofuseofthestandard;——ithasaddedtheintensitydegreeofQ500,Q550,Q620,andQ620andhascan
4、celedtheintensitydegreeofQ295；——ithasmodifiedtheprovisionsofthechemicalcompositionofsteel,andhastightenedcontrolofphosphorus,sulfurandotherharmfulelements;——ithasaddedtheformulaandprovisionsofsteelcarbonequivalentandcracksensitivitycoefficient;——ithasadjustedthe
5、deliverystatusofsteel,andhascanceledprovisionsofquenchedandtemperedsteel;——ithasmodifiedthemechanicalpropertiesofsteelvalueandthethicknessofthegroupdistancestipulations,andhasconfirmedtheyieldIstrengthastheloweryieldstrength;——ithasimprovedtheimpactabsorbingener
6、gyvalues;——ithasincreasedthethicknessdirectionoftheperformancerequirementsofthevariousgradesofsteel.ThisstandardisproposedbytheChinaIronandSteelAssociation,whichisunderthejurisdictionoftheNationalSteelStandardizationTechnicalCommittee.Themaindraftingunitsofthest
7、andard:HeavySectionPlantofAngangSteelCo.,MetallurgicalIndustryInformationStandardInstitute,JinanIronandSteelCo.Ltd,ShougangGroup,JiangsuShagangGroup,HunanValinLianyuanIronandSteelCo.,Ltd.Chiefdraftersofthisstandard:LiuXuyuan,PuZhimin,WangXiaohu,GaoLing,WangLipin
8、g,HuangZhengyu,ZhouJian,MaYupu,ChenShouqin.Allpreviousversionsreplacedbythisstandard:——GB1591—1979，GB1591—1988，GB/T1591—1994.IIGB/T1591-2008Highstrengthlowalloystruct
