Automotive Carbon Steel Mechanical Tubing EN10305-1 , High
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- 1
- Min. Order:
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- Delivery Time:
- 30 Days
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Automotive Carbon Steel Mechanical Tubing EN10305-1 , High Precision
Quick Detail:
Automotive tubes with standard EN10305-1,material E255,delivery condition NBK
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.
Description:
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.
The raw material we choosing:high quality Bao Steel,XingCheng Steel and HuaiSteel.Physical and chemical inspection will be made to make sure each batch is in qualified range. After piecing,each piece of tube is checked to be in permitted size deviation,this can garantee higher thickness tolerance and concentricity.
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.
Finished tube anti-rust oil plating: We adopt high pressure spray plating method, the antirust oil is plated by high pressure jet after ten passes of filtering and one pass of precipitation to safeguard the tubes’ outer and inner surface cleaness and polishness.
Applications:
Automotive 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.
To be used in hydraulic system,automobile and in the occasion where the high precision,brightness,cleanness and mechanical properties of the tube are required.
Specifications:
Automotive Tube diamensions for the 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 and
Tolerance table of steel tube
|
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 and chemical composition for EN10305-1 automotive tubes
|
Chemical composition(cast analysis)a |
|||||||
|
Steel grade |
% by mass |
||||||
|
Steel name |
Steel number |
C |
Si |
Mn |
P |
Sb |
AI |
|
max. |
max. |
max. |
max. |
max. |
min. |
||
|
E215 |
1.0212 |
0.10 |
0.05 |
0.70 |
0.025 |
0.025 |
0.025 |
|
E235 |
1.0308 |
0.17 |
0.35 |
1.20 |
0.025 |
0.025 |
- |
|
E355C |
1.0580 |
0.22 |
0.55 |
1.60 |
0.025 |
0.025 |
- |
Mechanical prorperties for EN10305-1 automotive tubes
|
Mechanical properties at room temperature |
|||||||||||||
|
Steel grade |
Minimum values for the delivery condition |
||||||||||||
|
Steel name |
Steel number |
BK |
BKW |
BKS |
GBK |
NBK |
|||||||
|
Rm |
A |
Rm |
A |
Rm |
ReH |
A |
Rm |
A |
Rm |
ReH |
A |
||
|
MPa |
% |
MPa |
% |
MPa |
MPa |
% |
MPa |
% |
MPa |
MPa |
% |
||
|
ST35 |
1.0305 |
480 |
6 |
420 |
10 |
420 |
315 |
14 |
315 |
25 |
340 to 470 |
235 |
25 |
|
ST45 |
1.0408 |
580 |
5 |
520 |
8 |
520 |
375 |
12 |
390 |
21 |
440 to 570 |
255 |
21 |
|
ST52 |
1.0580 |
640 |
4 |
580 |
7 |
580 |
420 |
10 |
490 |
22 |
490 to 630 |
355 |
22 |
Delivery condition and heat treatment processing of precision tubes for the automotive industry
|
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. |
Length of precision tubes for the automotive industry
random length precision tubes in the range of 3 – 10 m
approximate length with tolerance +/-10 mm
tubes for the automotive industry also can be delivered as cut tubes according to customers’ requirment.
Marking of precision tubes and bundles of precision tubes
Marking of standard precision tubes is done according to standards or upon agreement by the InkJet system either in one spot or along the whole length of a tube. Bundle marking is done either by one or multiple labels with required data.
Surface protection of precision tubes for the automotive industry
Tubes are supplied with anticorrosion application. Internal surface and external surface are flushed with antirust oil.
Testing of precision tubes for the automotive industry
The mandatory tests for standard precision tubes are chemical analysis, tensile test, dimensional inspection and visual inspection.
Specific testing – acceptance testing certificate 3.1.B (3.1.A, 3.1.C).
Elective testing: flattening test or drift expanding test, roughness measurement and NDT to find longitudinal defects: eddy current inspection test,as a proof of tightness or leakage test by eddy current EN 10246-1.
Certificates for precision tubes
Certificates are issued according to standards, as an example we are showing: EN 10 204 (non-specified testing – 2.2, specified testing 3.1.B or 3.1.A, 3.1.C).
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.
