GB/T700-2006istheChinesenationalstandardforcarbonstructuralsteels.TheEnglishnameis"Carbonstructuralsteels".Thisstandardspecifiestheclassification,technicalrequirements,testmethods,inspectionrules,packaging,marking,andqualitycertificatesforcarbonstructuralsteels.Itappliestohot-rolledplates,strips,bars,wires,andprofilesusedingeneralstructuresandengineeringapplications.ThestandarddividescarbonstructuralsteelsintogradessuchasQ195,Q215,Q235,andQ275,where"Q"representstheyieldstrength,andthenumberindicatestheminimumyieldstrengthvalueinMPa.Thesesteelsarewidelyusedinconstruction,machinery,andgeneralengineeringduetotheirgoodweldability,formability,andmechanicalproperties.GB/T700-2006replacestheearlierversionGB/T700-1988,incorporatingupdatestobetteralignwithinternationalstandardsandimprovematerialperformancerequirements.
