Tubes for Mechanical and Automobile

Steel usage for Backbone of Automobile and rear axle tube, manufacturing and processing of precision equipments, instruments and apparatus.

Sunny 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:
St35St45St52
1010, 1020, 1025, 1035, 1045
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 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.

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