LR, ABS, NK, GL, DNV, BV, KR, RINA, CCS Grade B LR, ABS, NK, GL, DNV, BV, KR, RINA, CCS Grade B Shipbuilding steel plate. Capable Classification Society Quality Authentication from LR, ABS, NK, GL, DNV, BV, KR, RINA, CCS Grade B steel,ASTM A131 Grade B steel plate is a kind of shipbuilding steel w ...