Germany · WL
1.7784
WL 1.7784-4:1976 — WL 1.7784-4
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.38 | 0.43 | ||
| Cr | 4.75 | 5.25 | ||
| Mn | 0.2 | 0.4 | ||
| Mo | 1.2 | 1.4 | ||
| P | 0.015 | |||
| S | 0.01 | |||
| Si | 0.8 | 1 | ||
| V | 0.4 | 0.6 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| steel tubes, quenched and tempered or | ≥1500 | 1800–2000 | ≥6 | ≥15 | HV 536–635 | |
| steel tubes, annealed | HV ≤265 |