Steel plate include Common carbon steel plate, Alloy steel plate, shipbuilding steel plate, pressure vessel steel plate etc. ... pipe etc. the steel plate include Common carbon steel plate, Alloy steel plate, shipbuilding steel plate, pressure vessel steel plate, boiler ... 6-80 mmGB700-1988Steel structure, City construction, mechanical production 2Low alloy steel plate Q345 A,B,C,D 6-100 mm ...