High Strength Structural Pipe

High Strength Mechanical & Structural Pipe
 
Standard
GB/T 8162 China National Standard 
DIN 1629 Deutsche Industries Normen
 
Uses
For the manufacture of pipes, vessels, equipment, pipe fittings and steel structures.
 
Chemical Composition (%)

Chemical Composition of High Strength Mechanical & Structural Pipe

Standard	Grade	C	Si	Mn	P	S	Ni	Cr	Cu	Mo	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
	34	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
	Q345D	<0.18	<0.55	1.00-1.60	<0.025	<0.020	<0.30	<0.30	<0.30		0.02
	Q345E	<0.18	<0.55	1.00-1.60	<0.025	<0.020	<0.30	<0.30	<0.30		0.02
DIN 1629	St37.0	<0.17	0.17-0.37	0.35-0.65	<0.025	<0.020	<0.25	<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	<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	<0.25
	St52.0	<0.22	<0.55	<1.60	<0.025	<0.020	<0.25	<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	<0.25

Mechanical Properties

Mechanical Properties of High Strength Mechanical & Structural Pipe

Standard	Grade	Elongation	Yield Strength		Tensile Strength	Temp.	Impact
		min	<16mm	>16-30mm	MPa	℃	KV/J
GB/T 8162	10	24	205	195	>335
	20	20	245	235	>410
	35	17	305	295	>510
	45	14	335	325	>590
	Q345A	20	345	325	470 - 630
	Q345B	20	345	325	470 - 630	20	34
	Q345C	21	345	325	470 - 630	0	34
	Q345D	21	345	325	470 - 630	-20	34
	Q345E	21	345	325	470 - 630	-40	27
DIN 1629	St37.0	25	235	225	350-480
	St44.0	21	275	265	420-550
	St55	17	295	285	540-645
	St52.0	21	355	345	500-850
	CK45	14	335	325	590-730