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Structure Tube Chemical Composition

standard:	GB/T 8162， DIN1629
Uses:For manufacture of pipelines, vessels,equipment,pipe fittings and steel structures

Chemical Composition(%)

Standard	Grade	C	Si	Mn	P	S	Cr	Ni	Cu	V
GB/T 8162	10	0.07-0.13	0.17-0.37	0.35-0.65	≦0.025	≦0.020	≦0.15	≦0.30	≦0.25	－
	20	0.17-0.23	0.17-0.37	0.35-0.65	≦0.025	≦0.020	≦0.25	≦0.30	≦0.25	－
	35	0.32-0.39	0.17-0.37	0.50-0.80	≦0.025	≦0.020	≦0.25	≦0.30	≦0.25	－
	45	0.42-0.50	0.17-0.37	0.50-0.80	≦0.025	≦0.020	≦0.25	≦0.30	≦0.25	－
	Q345A	≦0.20	≦0.55	1.00-1.60	≦0.025	≦0.020	≦0.30	≦0.30	≦0.30	－
	Q345B	≦0.20	≦0.55	1.00-1.60	≦0.025	≦0.020	≦0.30	≦0.30	≦0.30	－
	Q345C	≦0.20	≦0.55	1.00-1.60	≦0.025	≦0.020	≦0.30	≦0.30	≦0.30	0.02-0.15
	Q345D	≦0.18	≦0.55	1.00-1.60	≦0.025	≦0.020	≦0.30	≦0.30	≦0.30	0.02-0.15
	Q345E	≦0.18	≦0.55	1.00-1.60	≦0.025	≦0.020	≦0.30	≦0.30	≦0.30	0.02-0.15
DIN 1629	St37.0	≦0.17	0.17-0.37	0.35-0.65	≦0.025	≦0.020	≦0.25	≦0.25	≦0.25	－
	St44.0	≦0.21	0.17-0.37	0.50-0.80	≦0.025	≦0.020	≦0.25	≦0.25	≦0.25	－
	St55	0.33-0.41	0.17-0.37	0.50-0.80	≦0.025	≦0.020	≦0.25	≦0.25	≦0.25	－
	St52.0	≦0.22	≦0.55	≦1.60	≦0.025	≦0.020	≦0.25	≦0.25	≦0.25	－
	CK45	0.42-0.50	0.17-0.37	0.50-0.80	≦0.025	≦0.020	≦0.25	≦0.25	≦0.25	－

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