GBT1591isaChinesenationalstandardthatspecifiesthetechnicalrequirementsforhigh-strengthlow-alloystructuralsteels.Thesesteelsarecommonlyusedinconstruction,bridges,vehicles,andotherstructuralapplicationswherehighstrengthandgoodweldabilityarerequired.Thestandardcoverschemicalcomposition,mechanicalproperties,dimensions,tolerances,andtestingmethodsforthesesteelproducts.Itensuresthequalityandperformanceofthematerialsinvariousengineeringapplications.ThedesignationsysteminGBT1591typicallyincludesyieldstrengthvaluestoindicatethesteelgrade.ThisstandardplaysanimportantroleinChina'ssteelindustryandconstructionsectorbyprovidingunifiedspecificationsforstructuralsteelmaterials.
