Japan · JIS
SSW-Q3R Class 2
JIS E5402:1989 — JIS E5402
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.6 | 0.75 | ||
| Cr | 0.3 | |||
| Cu | 0.3 | |||
| Mn | 0.5 | 0.9 | ||
| Mo | 0.08 | |||
| Ni | 0.3 | |||
| P | 0.045 | |||
| S | 0.05 | |||
| Si | 0.15 | 0.35 | ||
| V | 0.05 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| forgings, HB | 钢环 淬火及回火 (Q+T) ≤311 |