Cold drawn or cold rolled precision seamless steel tubes
inside precision seamless tubes for hydraulic pressure and pneumatic services.
Application: for AUTO use; for machinery use; oil cylinder tube; motorcycle shock reducer steel tubes; Auto shock reducer inner cylinder
| BK | BKW | BKS | GBK | NBK | ||||||||
| Steel grade | Tensile point | Elongation | Tensile point | Elongation | Tensile point | Yield point | Elongation | Tensile point | Elongation | Tensile point | Yield point | Elongation |
| St35 | 480 | 6 | 420 | 10 | 420 | 315 | 14 | 315 | 25 | 340-470 | 235 | 25 |
| St45 | 580 | 5 | 520 | 8 | 520 | 375 | 12 | 390 | 21 | 440-570 | 235 | 21 |
| St52 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490-630 | 355 | 22 |
|
Steel grade |
Minimum values for the delivery condition | ||||||||||||
|
Steel name |
Steel number |
+C |
+LC |
+SR |
+A |
+N | |||||||
|
RM MPa |
A% |
RM MPa |
A% |
RM MPa |
ReH MPa |
A% |
RM MPa |
A% |
RM MPa |
ReH MPa |
A% | ||
|
E215 |
1.0212 |
430 |
8 |
380 |
12 |
380 |
280 |
16 |
280 |
30 |
290-430 |
215 |
30 |
|
E235 |
1.0308 |
480 |
6 |
420 |
10 |
420 |
350 |
16 |
315 |
25 |
340-480 |
235 |
25 |
|
E355 |
1.0580 |
640 |
4 |
580 |
7 |
580 |
450 |
10 |
450 |
22 |
290-430 |
355 |
22 |
| Steel grade | Minimum values for the delivery condition | |||||
| Steel name | Steel number | +A | +N | |||
| RM MPa | A% | RM MPa | ReH MPa | A% | ||
| E215 | 1.0212 | 280 | 30 | 290-430 | 215 | 30 |
| E235 | 1.0308 | 315 | 25 | 340-480 | 235 | 25 |
| E355 | 1.0580 | 450 | 22 | 290-430 | 355 | 22 |