Standard: DIN 17175
Grade: St35.8, St45.8
Chemical composition
| Elements | St35.8 (1.0305) | St45.8 (1.0405) |
| C | ≤0.17 | ≤0.21 |
| Si | 0.1-0.35 | 0.1-0.35 |
| Mn | 0.40-0.80 | 0.40-1.20 |
| P max | 0.040 | 0.040 |
| S max | 0.040 | 0.040 |
Mechanical properties
| Steel grade | Tensile properties at room temperature | Impact properties | |||||
| Upper yield stength or proof strength ReH or RP0.2 for Wall Thickness T min. Mpa | Tensile Strength Rm Mpa | Elongation A min. % | Minimum average absorbed energy KV J at room temperature | ||||
| T ≤16 | 16＜T≤40 | 40＜T≤60 | l | t | t | ||
| St35.8 | 235 | 225 | 215 | 350 to 480 | 25 | 23 | 34 |
| St45.8 | 255 | 245 | 235 | 410 to 530 | 21 | 19 | 27 |