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Tubes for Mechanical and Automobile

Seamless Steel Tubes for Mechanical and Automobile usage for Backbone of Automobile and rear axle tube, manufacturing and processing of precision equipments, instruments and apparatus. HYST QCCO China Steel supply a 1/2 million foot inventory of carbon steel pressure tubing including boiler tubes, condenser tubes and heat exchanger tubes all made in the China.
Our carbon steel pressure tubing inventory is manufactured in accordance with ASME SA-178 A and/or ASME SA-214 in diameters of 3/4″ through 4”.

Application:

Backbone of Automobile and rear axle tube

Manufacturing and processing of precision equipments, instruments and apparatus

Production Standard, Grade, Steel No:

DIN2391 St35St45St52

ASTM A519 1010, 1020, 1025, 1035, 1045

ASTM A513 1010, 1020, 1025, 1035, 1040

BS6323 CFSCFS3ACFS4-11

EN10305-1 E215E235E355

JIS G 3441 SCM415TK SCM 430 TKSCM 440 TK

GB/T3639 10, 20, 35, 45

Delivery Condition: GBK, BKS, BK, BKW, NBK

Inspection and Test:

Chemical Composition, Mechanical Properties, Visual and Dimension Test, NDT, Grain Size Test

Surface treatment:

Oil-dip, Varnish, Shot Blasting

Grade and Chemical Composition (%)

Grade	C	Mn	P≤	S≤	Si	Cr	Mo
1010	0.08-0.13	0.30-0.60	0.04	0.05	-	-	-
1020	0.18-0.23	0.30-0.60	0.04	0.05	-	-	-
1045	0.43-0.50	0.60-0.90	0.04	0.05	-	-	-
4130	0.28-0.33	0.40-0.60	0.04	0.05	0.15-0.35	0.80-1.10	0.15-0.25
4140	0.38-0.43	0.75-1.00	0.04	0.05	0.15-0.35	0.80-1.10	0.15-0.25

Typical Mechanical Properties

Grade	Condition	Tensile strength	Yield stength	Elongation
		Mpa(min)	Mpa(min)	%(min)
1020	CW	414	483	5
	SR	345	448	10
	A	193	331	30
	N	234	379	22
1025	CW	448	517	5
	SR	379	483	8
	A	207	365	25
	N	248	379	22
4130	SR	586	724	10
	A	379	517	30
	N	414	621	20
4140	SR	689	855	10
	A	414	552	25
	N	621	855	20

Size Range

Tubular products seamless mechanical tubing is furnished in both cold-drawn and hot finished form in a wide range of sizes, from 1.375″ to 7.750″ OD and from 0.188″ to 1.625″ wall thickness.

Minimum Quantities

Hot-finished carbon and alloy—10,000 pounds, or 4,536 kilograms minimum.
Cold-drawn carbon and alloy—5,000 pounds minimum or 125 feet minimum, 2,268 kilograms minimum or 38.1 meters minimum, whichever is greater.
Quantity variation—standard ±10% of the ordered weight, or ±25 feet or 7.61 meters, whichever is greater.

Special Configurations

Tubular Products special seamless tubing configurations start with the highest quality steels. Grade, chemical analysis and surface condition are carefully considered, and production processes are tailored to achieve the best tubing for the end use.
The configurations are formed from round tube by cold drawing. The tube is drawn over a shaped mandrel or through a shaped die, or both. Improved tolerances, finishes and mechanical properties result.