... 1Common carbon steel plate Q235 A,B,C,DQ255 A,BQ275 A,B 6-80 mmGB700-1988Steel structure, City ... construction, mechanical production 2Low alloy steel plate Q345 A,B,C,D 6-100 mm GB/T1591-1994Steel structure, ... mm 6-32 mmGB6654-1996Pressure vessel production 6Steel plate for shipbuildingA,B,C,D A32,AH32,D32, DH32,A36, ... equipment 13High-strength structure steel plate Q390A/B/C/D/E Q420A/B/C/D/E Q460C/E/E ...