... /ASTM/JIS/ S275JRGrade:A36,SS400,Q235,Q345,ST37,ST52Zinc thickness:30-80um(200-600g/m2)Size: from Size 20--Size 200 ... , etcGrade:A36,SS400,Q235,Q345,ST37,ST52,ST275,S275JRZinc thickness:30-80um(200-600g/m2)Size: 50mm-400mm Galvanized Steel FlatSpecification ... etcGrade:A36,SS400,Q235,Q345,ST37,ST52,ST275,S275JRZinc thickness:30-80um(200-600g/m2)Thinckness:2mm-5mm Update Date:2011 ...