DIN2391 Standard is for Cold Drawn High Precision Seamless Tube.
Grade and Chemical Composition(%):
|
Grade |
Chemical Composition(%): | ||||
| C max | Si max | Mn | P max | S max | |
| St 35 | 0.17 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 45 | 0.21 | 0.35 | ≥0.40 | 0.025 | 0.025 |
| St 52 | 0.22 | 0.55 | ≤1.60 | 0.025 | 0.025 |
Mechanical Properties(Mpa):
|
Steel grade |
BK | BKW | BKS | GBK | NBK | |||||||
|
RmN/mm min |
min |
RmN/mm min |
min |
N/mm min |
ReH N/mm min |
min |
N/mm min |
min |
N/mm min |
ReH N/mm min |
min | |
| 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 |
