... , CortenB, SHT60, Q550CFC, NR400ZL7>. GB 16Mn, 15MnV, 15MnVN, Q460CShipbuilding and Offshore Platform Steel Plate: Classification Society Certificate: CCS,DNV,GL,LR,BV,ABS,NK ... Q235qC, Q345qC (16Mnq), Q370qC, Q420qC Building Structural Steel Plate: GB Q235GJC, Q345GJC, Q390GJC, Q420GJC, Q460GJCHigh Quality Carbon Steel Plate: 1>. ASTM 10252>. GB 20Mn, 50Mn ...