Italy · UNI
X 30 WCrV 5 3 KU
UNI 2955-4:1982 — UNI 2955-4
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.25 | 0.35 | ||
| Cr | 2 | 3 | ||
| Mn | 0.15 | 0.45 | ||
| P | 0.03 | |||
| S | 0.03 | |||
| Si | 0.1 | 0.4 | ||
| V | 0.4 | 0.7 | ||
| W | 4.5 | 5.1 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| bars, HR | 锻件 淬火及回火 ≤46 | |||||
| forgings, annealed | HB ≤235 |
Heat treatment
| Type | 1 |
|---|---|
| Heat-treatment curve | TTT |
| Heat-treatment curve | Hardness-Tempering |
| Heat-treatment curve | CCT |