| Type: | Seamless |
|---|---|
| Technique: | Cold Drawn |
| Material: | Alloy Steel |
| Surface Treatment: | Oiled |
| Usage: | Pipeline Transport, Machinery Industry, Special Purpose |
| Section Shape: | Round |
| Customization: |
|---|
Suppliers with verified business licenses
Audited Supplier DIN 2391 EN 10305-1 EN10305-4 preision tube for automobile or hydraulic usage
Cold drawn precision seamless carbon steel tube
DIN 2391 EN 10305-1 EN10305-4 preision tube for automobile or hydraulic usage
Production range: OD from 10 mm to 100mm; wall thickness up to 10mm
Steel grades:
|
Standard Tubes |
||
|
Standards |
TDR Standards |
Steel Grades |
|
DIN |
1629 |
ST 37 / 44 / 52 |
|
EN |
10305-1 |
E215/235/355/255 |
|
ASTM |
A 519 |
1010 |
|
BS |
BS 6323 |
CFS3 |
|
NFA |
49310 |
TU 37 b |
DELIVERY CONDITIONS
The tubes can be produced in the following delivery conditions:
BK (+C) Cold finished/hard (cold finished as drawn).
No heat treatment after the last cold forming process.
BKW (+LC) Cold finished/soft (lightly cold worked)
After the last heat treatment there is a light finishing pass (cold drawing).
BKS (+SR) Cold finished/stress relieve annealed.
After the final cold forming process the tubes are stress relieve annealed.
GBK (+A) Annealed.
After the final cold forming process the tubes are annealed in a controlled atmosphere.
NBK (+N) Normalized. (Mainly focus on)
After the final cold forming process the tubes are annealed above the upper transformation point in a controlled atmosphere.
2 SURFACE TREATMENTS
1. Bare Tube (No coating): Bright and smooth, Surface Roughness both inner and outer surface 0.2Ra Maximum for special requirement
2. Surface Coating
A. Silver galvanized
B. Yellow galvanized
C. Olive green coated
Layer thickness: 8-20um, Salty Spray Test: 48-150 hours
3. Black phosphate
3 APPLICATIONS
1. Automotive fields
A. Fuel injection lines/nozzles
B. CNG (Compressed Nature Gas) tube-- Burst pressure: 1307Bar, Working Pressure: around 350bar
C. Drive transmission: Steering column elements
D. Gear shafts, hand brake, front axles, airbag inflators, stabilizers, seat fasteners, front-wheel drive shafts
2. Hydraulic Fields
A. Hydraulic circuits (HPL), pneumatic lines, and hydraulic suspension
B. Hydraulic cylinders (HPZ)
| Mechanical properties at room temperature | |||||||||
| Delivery condition | BK | BKW | GBK | NBK | |||||
| steel Grade | Rm Mpa (Min) | A %(Min) | Rm Mpa(Min) | A %(Min) | Rm Mpa(Min) | A %(Min) | Rm Mpa(Min) | ReH Mpa(Min) | A %(Min) |
| St30Al or E215 | 430 | 8 | 380 | 12 | 280 | 30 | 290 to 430 | 215 | 30 |
| St35 or E235 | 480 | 6 | 420 | 10 | 315 | 25 | 340 to 480 | 235 | 25 |
| St45 or E255 | 580 | 5 | 520 | 8 | 390 | 21 | 440 to 570 | 255 | 21 |
| St52 or E355 | 640 | 4 | 580 | 7 | 450 | 22 | 490 to 630 | ||
Suppliers with verified business licenses
Audited Supplier 
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