Italy · UNI
X 21 Cr 13 KU
UNI 2955-3:1982 — UNI 2955-3
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.16 | 0.25 | ||
| Cr | 12 | 14 | ||
| Mn | 1 | |||
| Ni | 1 | |||
| P | 0.03 | |||
| S | 0.03 | |||
| Si | 1 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| bars, HB | 锻件 退火 223 | |||||
| forgings, quenched and tempered | HR ≥45 HRC |