Leading Manufacturer for Profiled Sch40 Alloy Steel Seamless Tubes Smls Tubing

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Precision Seamless Steel Piping for mechanical and light structural applications.

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Precision Seamless Steel Piping for mechanical and light structural applications. This results in more uniform properties throughout the pipe compared to standard pipes. While mechanical tubes can be produced to standard specifications upon request, the “typical” properties typically produced focus on yield strength for precise dimensions and wall thicknesses. In some heavily formed applications, the yield strength may not even be specified and the mechanical tube is produced “fit for use”. Mechanical tubing includes a wide range of structural and non-structural applications.

At Haihui Steel, we apply our metallurgical and production expertise to manufacture high-performance seamless mechanical pipe products to meet your needs.

This includes carbon, alloys and even custom steel grades; annealed, normalized and tempered; stress relieved and stress free; quenched and tempered.

Machinery and automotive seamless steel pipes for automobile skeleton and rear axle pipes, manufacturing and processing of precision equipment and instruments.

Application:

Backbone of Automobile and rear axle tube

Manufacturing and processing of precision equipments, instruments and apparatus

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
Grade	Condition	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

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.

Seamless and welded tubes for mechanical and general engineering applications. Tubes for construction and structural purposes such as civil structures, foundations, etc.

Standard		Steel Grade
EN	10297	E355
	10210-1/2	S235JRH, S275JOH, S275J2H, S355JOH, S355J2H
	10219-1/2	S235JRH, S275JOH, S275J2H, S355JOH, S355J2H
DIN	1629/2448	St-52
ASTM	A500	Gr. A, Gr. B
	A501	Gr. A, Gr. B
	A618	Gr. I, Gr. II, Gr. III

Dimensional Tolerance

Supply Conditions	Steel Tubes Provided according to Outside Diameter and Wall Thickness			Steel Pipes Provided according to Outside Diameter, Inside Diameter and Wall Thickness		Steel Tubes with the Outside Diameter of 77 mm, Inside Diameter of 57 mm and the Wall Thickness of 10 mm
Allowable Deviation of Diameter and Wall Thickness	Size (mm)		Allowable Deviation (%)	Size	Allowable Deviation	Size	Allowable Deviation
	Outside Diameter		±1.0	Outside Diameter	±1.0%	Outside Diameter	+1.0 mm-0.55 mm
	Wall Thickness	≤ 7	+15-9
		﹥7-15	+12.5-10	Inside Diameter	±1.75%	Inside Diameter	+1.5 mm-0.5 mm
		﹥15	+12.5-7.5	Wall-Thickness-Difference	≤ 15% of Nominal Wall Thickness	Wall-Thickness-Difference	≤ 15% of Nominal Wall Thickness