Item No.	Steel grade	Representative ID	Size (mm)	Applicable standard	Purpose
1	Carbon steel plate	Q195、Q235A/B	h:6～40	GB/T 3274-1988	Building structure
2	Ship plate	A、B、D	h:6～25	GB 712-2000 and CCS	Ship structure
			h:6～30	DNV、NK、LR、GL
3	Coiler steel	20g	h:6～40	GB 713-1997	Boiler structure
4	Vessel steel	20R、16MnR		GB 6654-1996	Pressure vessel
5	Low alloy steel	Q295A、Q345A/B/C		GB/T 3274-1988	Building structure
6	Middle carbon steel	45＃、50＃		GB/T 711-1988	Structure parts
7	Bridge steel	16Mnq		GB/T 712-2000	Bridge structure
8	Auto beam steel	16MnL	h:6～12	GB/T 3273-1989	Auto beam
9	Pipeline steel	X52、X56、X60	h:6～40	GB/T 14164-1993	Petroleum & natural  gas pipeline
Remark:　（1）Plate thickness 1500-2700mm；length 2000-12000mm。 (2)CCS: in China, DNV：in Norway, NK：in Japan, LR：in GB, GL：in Germany