Torich International Limited
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Standard: DIN2391 Seamless cold drawn/rolling steel tubes
Size range: O.D.:6-350mm W.T.:1-30mm L:max12000mm
Applications:For Auto industry / for machinery use / Oil Cylinder Tube / Motorcyle shock absorber
Auto shock absorber innder cylinder / Telescopic Cylinders
Inter Diamater roughness could be reach 0.3μm 0.4μm or as per request.
Steel Grade and Chemical Compositions:
| Steel Grade | C | Si | Mn | P | S |
| max | max | max | max | ||
| ST35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| ST45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| ST52 | 0.22 | 0.35 | ≥1.60 | 0.025 | 0.025 |
| Mechanical properties at room temperature | ||||||||||
| Steel Grade | Minimum values for the delivery condition | |||||||||
| BKW | BKS | GBK | (+N) NBK | |||||||
| ST35 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 340-470 | 235 | 25 |
| ST45 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 440-570 | 235 | 21 |
| ST52 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490-630 | 355 | 22 |
Note: Special steel grade is also available, according to customer request.
Application: