China · GB
50CrVA
GB/T 3077:1999 — Alloy structure steels
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.47 | 0.54 | ||
| Cr | 0.8 | 1.1 | ||
| Cu | 0.25 | |||
| Mn | 0.5 | 0.8 | ||
| Mo | 0.1 | |||
| Ni | 0.3 | |||
| P | 0.025 | |||
| S | 0.025 | |||
| Si | 0.17 | 0.37 | ||
| V | 0.1 | 0.2 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| bars, quenched and tempered, d <=, 25 mm | ≥1130 | ≥1280 | ≥10 | ≥40 | HB ≤255 HB100/3000 |
Heat treatment
| Type | 3 | 4 | Remarks |
|---|---|---|---|
| Heat-treatment process | Tempered | 加热温度500℃，冷却剂水、油 | 表中所列热处理温度允许调整范围：淬火±15℃，低温回火±20℃，高温回火±50℃。 |
| Heat-treatment process | Quenched | 第一次淬火860℃，冷却剂油 | 表中所列热处理温度允许调整范围：淬火±15℃，低温回火±20℃，高温回火±50℃。 |