1.The Mild steel grade are:DCO01,SPCC,Q235C,Q235D,Q235E;Q345B,Q345C,Q345E,Q345E. 2.Shipbuilding steel plate.Mainly used in ship build. The grades are:A32,AH32,A36,AH36,DH36,AH36,D32,DH32 ETC. 3.Carbon structural and high strength steel plate.Mainly used in bridges,power station equipment,lifting machinery,mining macinery and other large welding structural parts.Q460C/D/E,Q235B/C/D/E,Q609C/D/E 4.Alloy Steel Plat.Mainly used in Machinery,structure,tool,etc. 40Cr,50Mn,65Mn,15CrMo,35CrMo,42CrMo etc.