... GB 16Mn, 15MnV, 15MnVN, Q460CShipbuilding and Offshore Platform Steel Plate: Classification Society Certificate: CCS,DNV,GL,LR, ... AH36, DH36, EH36, AH40, DH40, EH40, 2H Grade 50Alloy Structural Steel Plate: Standard: Special ConditionGrade: 50Mn2V, 15CrMo, 20Mn2, 40Mn2, ... GB Q235qC, Q345qC (16Mnq), Q370qC, Q420qC Building Structural Steel Plate: GB Q235GJC, Q345GJC, Q390GJC, Q420GJC, Q460GJCHigh Quality ...