... , CortenB, SHT60, Q550CFC, NR400ZL7>. GB 16Mn, 15MnV, 15MnVN, Q460C Shipbuilding and Offshore Platform Steel Plate:Classification Society Certificate: CCS,DNV,GL,LR,BV,ABS,NK ... , AH32, DH32, EH32, AH36, DH36, EH36, AH40, DH40, EH40, 2H Grade 50 Alloy Structural Steel Plate:Standard: Special ConditionGrade: 50Mn2V, 15CrMo, 20Mn2, 40Mn2, 20MnSi, 20CrMo ...