... profiled bar, steel pipe etc. the steel plate include Common carbon steel plate, Alloy steel plate, shipbuilding steel plate, pressure vessel ... scope see below table No.DescriptionGrade ThicknessStandard Use scope 1Common carbon steel plate Q235 A,B,C,DQ255 A,BQ275 ... /T1591-1994Steel structure, vehicle production, mechanical production 3Fine carbon structure steel plate 10 # to 50 #20 Mn 6-80 mm GB711 ...