Cold Drawing Precision Steel Seamless Tubes For Automotive

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Min. Order:: 1

Delivery Time:: 30 Days

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Basic Info

Place of Origin:	CHINA

Product Description

Cold Drawing Precision Steel Seamless Tubes For Automotive Industry

Outside diameter ranges from 4 to 60 mm and wall thickness ranges from 0.5 to 7mm. Precision steel tubes are delivered according to EN 10305-1, DIN 2391, BS 6323/4,ASTM A519 and JIS G3445.

Tolerance table of Cold Drawing Precision Steel Seamless Tubes

NAME	SCOPE(mm)	GB (mm)	DIN (mm)	Enterprise control(mm)	Special high-precision(mm)
OD Out Diameter	4-30	±0.1	±0.08	±0.05	±0.03
	31-40	±0.15	±0.15	±0.05	±0.03
	41-50	±0.20	±0.20	±0.08	±0.03
	51-60	±0.25	±0.25	±0.08	±0.03
Wall thickness	0.5-7	±10%,Min±0.12	±10%	±10%,Min±0.05	±10%,Min±0.03

Steel grades for Cold Drawing Precision Steel Seamless Tubes

Standard	Material
EN10305-1	E215, E235, E255, E355,C45E, 30GrMo
DIN2391	ST35,ST45,ST52,ST37.4
BS6323/4	CFS3,CFS4,CFS5,CFS8
ASTMA519	SAE1010,SAE1020,SAE1045
JISG3445	STKM11A,STKM13A
SAEJ524	SAE1010

Delivery condition and heat treatment processing

Delivery Condition	Heat treatment process
+C	Cold drawn/hard.After the last cold forming,no heat treatment.
+LC	Cold drawn/soft.After the last heat treatment follows the cold drawing there is a light finishing pass.
+SR	Cold drawn and stress relieved annealed. After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere.
+A	After the final cold drawing process the tubes are stress relieved annealed in a controlled atmosphere.
+N	Normalized. After the last cold drawing process the tubes are annealed in a controlled atmosphere.

Features:

1.Precision steel seamless tubes for automotive industry are made using the cold drawing process. Precision tubes are made from carbon steel from quality Bao Steel,XingCheng Steel,and HuaiSteel.

2. The tubes are high precision in tolerance,excellent surface brightness,no oxidization on the outer and inner walls after heat treatment,high cleanness of inside wall.

3. No deformation after cold bending,no crack after flaring and flattening.

Synopsis of Process Routing: Quality Carbon steel — Cold Drawn — Heat Treatment Without Oxidization (NBK Status) — Nondestructive Testing— Flushing The Internal Hole With Special Equipment Under The High Pressure —Dealing With Antirust Oil On Surface — Plastic Capping On Both Ends.

Production process quality control: We use the domestic first-class drawing machine,the production process is controlled with high hardness alloy internal and external matrix,so the product dimensions tolerance and ovality are strictly controlled in high level.Through the first, middle and last process inspection to ensure product quality.

Inner and Outer Surface Cleaning: We adopt automatic inner surface cleaning machine, rotating brush cleaning and high pressure oil flushing to clean the inner and outer surface.The new steel tube production craftsmanship can effectively remove all particulate attached to the inner and outer surface of tubes and thus achieving the utmost surface cleaness and polishness.

Applications:

Precision tubes are used for production of automotive steering systems,clutch system, braking system engine high pressure oil injecting tube,cardan shafts, shock absorbers and air springs, parts of the chassis, axle shafts, construction parts of chassis and axles, steering components, seats construction, bracing for dashboard.

Competitive Advantage:

Certificate we awarded:TS 16949
Our typical customer: Continential Contitech,Benteler.
We have passed BMW’S review.
We have been cooperating with many auto parts manufacture,our tubes are widely used in BMW,Volkswagen,and other brands.
400 tons precision steel tubes stock capacity,this make our delivery time short and timely.