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GBT 699-1999标准(英文版).doc
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NationalStandardofthePeople’sRepublicofChinaGB/T-QualityCarbonStructuralSteelsIssuedate:--Implementationdate:--IssuedbyStateBureauofQualityandTechnicalSupervisionForewordThisstandardhasrevisedGB/T-“Qualitycarbonstructuresteel-Technicalrequirements”.Thisstandardhasrevisedthefollowingtechnicalcontents:Amendsthenameofthestandard,whichchangedto“Qualitycarbonstructuralsteels”;Expandsthescopetothequalitycarbonstructuralsteelswhichcanprovidethediameterorthethicknessismorethanmm;Increasesthechapterof“Ordercontent”;Thedimension,ordancewiththeprovisionsofGB/T-B/T-;Increasestheunifiednumberingsystemforthemarkercodesandtrademarksofthesteelproducts;ThecarboncontentofthesteelproductswhosetrademarkisbelowNo.reducesby.%;Thephosphorus,sulfurcontentandmacrostructureofthesteelsaredividedintothreegradesbymetallurgicalquality;ingstate,ifthesupplyingpartycanguaranteethemechanicalperformance,thesteelscannotbeinspected;Inthenoteofthetable,changesthequenchingmediumofNo.,No.andNo.steelsfrom“watercooling”to“oilcooling”;Cancelstheinspectionitemof“fracture”;Cancelsthequalifiedgradeofthenon-metallicinclusions.ThisstandardwillreplaceGB/T-“Qualitycarbonstructuresteel-Technicalrequirements”sinceitsimplementation.ThisstandardwasproposedbyStateBureauofMetallurgicalIndustry.mittee.Themajordraftingunitsofthisstandardare:ChinaMetallurgicalInformationandStandardizationResearchInstitute,ChongqingSpecialSteelCo.,Ltd.,ShanghaiPudongIronandSteel(Group)Co.,Ltd.,DayeSpecialSteelCo.,Ltd.,andHandanIron&SteelCo.,Ltd..Majordraftman:LuanYan,TangYifan,TangZhibai,ChenChangxi,SunPing,TengChangling,andZhaoGuanxin.ThisstandardwasfirstlyissuedinJanuary,andthefirstrevisionwasissuedinFebruary,.NationalStandardofthePeople’sRepublicofChinaGB/T-QualityCarbonStructuralSteelsReplaceGB/T-ScopeThisstandardspecifiesthedimension,shape,weightandthetolerance,technicalrequirements,testmethods,restrules,packaging,c.edqualitycarbonstructuralsteels.Thisstandardisapplicabletothequalitycarbonstructuralsteelbarswiththediameterorthicknessisnotmorethanmm.Throughthenegotiationbythetwoparties,itcanalsoprovidethequalitycarbonstructuralsteelbarswiththediameterorthicknessismorethanmm.ponentsofthisstandardarealsoapplicabletothesteelingots,steelbilletsandtheirproducts.NormativeReferencesThefollowingstandardscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthisstandard.Attimeofpublication,theeditionsindicatedwerevalid.Allstandardsaresubjecttorevision,andpartiestoagreementsbasedonthisstandardareencouragedtoinvestigatethepossibilityofapplyingthemostrecenteditionsofthestandardsindicatedbelow.GB/T-positionandpermissiblevariationsforproductanalysis.GB/T-Measuringmethodofdepthofdecarbonizinglayerofsteel.GB/T-Etchtestformacrostructureanddefectofsteels.GB/T-Metallicmaterials-Tensiletesting.GB/T-MetallicMaterials-CharpyNotchImpactTest.GB/T-Metallicmaterials-Brinellhardnesstest.GB/T-ingtestofmetals.GB/T-Hot-rolledroundandsquaresteels-Dimension,shape,we 内容来自淘豆网www.taodocs.com转载请标明出处.
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