National Standard of thePeople's Republicof China
High Strength Low Alloy Structural Steels
低合金高强度结构钢
(EnglishTranslation)
theStandardizationAdministrationofthePeople'sRepublicofChina
Issued bytheStateAdministrationforMarketRegulation
Contents
Foreword.1Scope.2Normative References..3 Terms andDefinitions..4 DesignationExpressionMethods.. .4Order Contents. .56 Dimension Shape and Weight .67. TechnicalRequirements. .6Test Methods. .249Inspection Rules. .2410Packaging Marking andQualityCertificate.. .26Annex A (Informative) Comparison of Designations between Domestic and ForeignStandards.. .27
Foreword
Codeofchina Inc.is in charge of this English translation.In case of any doubt about theEnglish translation theChinese original shallbe considered authoritative.
ThisstandardreplacesGB/T1591-2008HighStrengthLowAlloyStructuralSteels.InmadewithrespecttoGB/T1591-2008:
lt is specified that the chemical position in this standard is also applicable tobillet(see Chapter1;Chapter1in 2008 edition);
-Definitions of“thermomechanical processed”and“normalizing rolling”are revised and terms and definitions of“as-rolled” and“normalized” are added (see Chapter 3;Chapter3in2008edition);
Ordercontentsareadded(seeChapter5);
Requirementsfor dimension shape weight and permissible deviationare defined(see Chapter6;Chapter5in2008edition);
Chemicalpositionof eachdesignationis specified according todiferent deliverystates and the content of refined grain elements is revised (see 7.1;6.1in 2008 edition);
Mechanical propertyof eachdesignation isspecifiedaccording todifferent deliverystates and theloweryieldstrengthisrevisedasthe upperyield strength with theindexedition);
Surface quality requirements for steels are detailed (see7.5; 6.5 in 2008 edition);
is specified(seeChapters8and9;Chapters7and8in2008edition);
Comparisonofdesignationsbetweenthisstandard andforeignstandardisadded(seeAnnexA).
Thisstandardwasproposed byChina Iron andSteel Association.
This standard is under the jurisdiction of the National Technical Committee on Iron andSteelofStandardizationAdministrationofChina(SAC/TC183).
-GB1591-1979 GB1591-1988 GB/T1591-1994andGB/T1591-2008
HighStrengthLowAlloyStructuralSteels
1Scope
This standard specifies the designation expression methods order contents dimension shape weight technicalrequirements test methods nspectionrules packaging marking
structural steels used for general structures and works. Its chemical position is alsoapplicable tobillets.
2NormativeReferences
GB/T 222 PermissibleTolerancesforChemicalCompositionofSteelProductsGB/T 223.3 MethodsforChemicalAnalysisofIron SteelandAlloy-theDiantipyrylmethanePhosphomolybdateGravimetricMethodfortheDeterminationofPhosphorusContentGB/T223.9 Iron SteelandAlloy-DeterminationofAluminumContent-ChromAzurolSPhotometricMethodGB/T 223.11 IronSteelandAlloy-DeterminationofChromiumContent-VisualTitrationorPotentiometricTitrationMethodGB/T 223.14 MethodsforChemicalAnalysisoflron，SteelandAlloy-theN-benzoy-N-phenylhydroxylamineExtractionPhotometricMethodfortheDeterminationofVanadiumContentGB/T 223.17 Methodsfor Chemical Analysisof Iron Steeland Alloy-theDiantipyrylmethanePhotometricMethodfortheDeterminationofTitaniumContentGB/T223.18 MethodsforChemicalAnalysisofIron，SteelandAlloy-theSodiumThiosulfateSeparationlodimetricMethodfortheDeterminationofCopperContentGB/T 223.23 IronSteelandAlloy-DeterminationofNickelContent-theDimethylglyoximeSpectrophotometricMethodGB/T 223.26 IronSteelandAlloy-DeterminationofMolybdenumContent-theThiocyanateSpectrophotometricMethodGB/T223.37 Methods forChemicalAnalysis of Iron SteelandAlloy-theIndophenalBluePhotometricMethodsfortheDeterminationofNitrogenContentafterDistillationSeparation
