... Q550CFC, NR400ZL7>. GB 16Mn, 15MnV, 15MnVN, Q460CShipbuilding and Offshore Platform Steel Plate: Classification Society Certificate: CCS,DNV ... , P80A, 638B Pipeline Steel Plate: Standard: Special ConditionGrade: API 5L-B, X52 (L360), X56 (L390), X60 (L420 ... annealing, tempering, quenching, normalizing plus tempering, quenching and tempering, and other delivery states are available. Tests: HIC, SSC ...