Steel Tubes for Automobile

Seamless Hot-rolled Steel Tubes for Automobile
 
Standard
YB/T 5035 Standard of China Metallurgical Industry, Seamless Steel Tubes for Automotive Axle Housing
GB/T 8162 China National Standard, Seamless Steel Tubes for Structural Purposes
GB/T 25822 Shaped and round seamless steel tubes for axle
 
Uses
For manufacturing auto axle and housing

Chemical Composition (%)

Chemical Composition of Seamless Hot-rolled Steel Tubes for Automobile

Standard	Grade	C	Si	Mn	P	S	Cr	Ni	Cu
YB/T 5035	45	0.42-0.50	0.17-0.37	0.50-0.80	<0.030	<0.025	<0.25	<0.25	<0.25
	45Mn2	0.42-0.49	0.17-0.37	1.40-1.80	<0.025	<0.025	<0.30	<0.30	<0.20
GB/T 8162	20Mn2	0.17-0.24	0.17-0.37	1.40-1.80	<0.035	<0.035	<0.25	<0.25	<0.20

Mechanical Properties

Mechanical Properties of Seamless Hot-rolled Steel Tubes for Automobile

Standard	Grade	Elongation %	Yield Strength MPa	Tensile Strength MPa	Hardness HBW
YB/T 5035	45	≥14	≥335	≥590
	45Mn2	≥10	≥735	≥885	217-269
GB/T 8162	20Mn2	≥10	≥590	≥785

Note:
Grades other than the chart above mentioned can be made available through consultations.