... , BT1-0Gr1, Gr2, Gr3, Gr7Hot rolled(4.1mmR M0.01-0.5*50-600*100-15000.6-0 ... .0mm)Y MOT4 , BT22, Gr12Hot rolled (4.1mm< Thickness <60mm)R MCold rolled (0.5mm< Thickness <4.0mm)Y MBT5-1 ... , BT6Gr6, Gr5Hot rolled (4.1mm< Thickness <60mm)R MCold rolled (0.8mm< Thickness <4.0mm)Y MStandard: ASTM ...