... 1quality carbon structural steel plate 2The max weight of steel ingot is 60 ton 3The max thickness is 350mm 4GB/T700-2006 quality carbon structural steels ... 20085Hull structural steelH:5-150W:900-4800I:3000-25000A,B,D,E,A32,D32,E32,A36,D36,E36,F32,F36,A40,D40 ... ,Q690,Q890,Q800,Q960GB/T16270-200912Wear-resistant steel H:5-150W:900-4800I:3000-2500020MnTiB,N,360,NM400 quality carbon structural steel plate