DIN2391 Carbon Steel Mechanical Tubing For Automotive Hydra
- Min. Order:
- 1
- Min. Order:
- 1
- Delivery Time:
- 30 Days
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Contact Now| Place of Origin: | CHINA |
|---|
DIN2391 Carbon Steel Mechanical Tubing For Automotive Hydraulic System
Description:
- Standard:DIN2391/C/EN10305-1/4 /SAEJ524/BS6323/4/JISG3445/ASTMA519
- Size:OD:4-60mm,WT:0.5-6mm.
- Material:ST35,ST37.4,ST37,ST45,ST52,ST52.4,E235,E255,E355,SAE1010,SAE1020
- Delivery State:NBK/GBK.
- Raw material:Bao Steel,Huai Steel,XingCheng Steel with good quality.
- Length:5.8m,6m.
- Package:Bundles or wooden cases.
- Surface Anti-rust:Both outside and internal tube surface flushing with anti-rust oil.
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.
Quality:
- Surface roughness:Ra:0.8-1.3 um.
- Surface quality:very smooth and bright without oxide scale,pock,strach,crack and other defects.
- Internal hole Cleaness:clean without iron scrap,dust,better for hydraulic system life.
- Mechanical Properties:better extending rate and strength property,after bending with no deformation,after flattening and flaring process with no crack.
- Raw material: Precision tubes are made from carbon steel from quality Bao Steel,XingCheng Steel,and HuaiSteel.
Tolerance Table of DIN2391 Carbon Steel Mechanical Tubing For Automotive
|
NAME |
SCOPE(mm) |
GB (mm) |
DIN (mm) |
Enterprise control(mm) |
Special high-precision(mm) |
|
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 DIN2391 Carbon Steel Mechanical Tubing For Automotive
|
Chemical composition(cast analysis)a |
||||||
|
Steel grade |
% by mass |
|||||
|
Steel name |
Steel number |
C |
Si |
Mn |
P |
S |
|
max. |
max. |
|
max. |
max. |
||
|
ST35 |
1.0305 |
0.17 |
0.35 |
≥0.40 |
0.025 |
0.025 |
|
ST45 |
1.0408 |
0.21 |
0.35 |
≥0.40 |
0.025 |
0.025 |
|
ST52 |
1.0580 |
0.22 |
0.55 |
≤1.60 |
0.025 |
0.025 |
Mechanical prorperties for DIN2391 Carbon Steel Mechanical Tubing For Automotive
|
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
|
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. |
Application:
Our carbon steel tubes are used in hydraulic system,automobile,mechanical parts and in the occasion where the high precision,brightness,cleanness and mechanical properties of the tube are required.
- Certificate approved: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.
Production Line:
Production Equipment:
Packing and loading:
Laboratory Testing:
Our Customer:
Certificate Approved:
Quick Detail:
DIN2391 steel tube for automotive hydraulic system-ST45 NBK Condition OD8xTH1
1.DIN2391 steel tube for automotive hydraulic system 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.
4.Long working life for stable and higher pressure-bearing ability.
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.
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