China · GB
50
GB/T 3275:1991 — Hot-rolled quality carbon structural steel plates and strips automobile
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.47 | 0.55 | ||
| Cr | 0.25 | |||
| Cu | 0.25 | |||
| Mn | 0.5 | 0.8 | ||
| Ni | 0.3 | |||
| P | 0.035 | |||
| S | 0.035 | |||
| Si | 0.17 | 0.37 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| heavy plate, steel strip, Heat treated | ≤540 | ≤13 | ||||
| heavy plate, HB | 钢带 Heat treated 184 | |||||
| hot rolled , , heat treated+ | 540–735 非标准数据，仅供参考 | ≥13 非标准数据，仅供参考 | HB ≤184 非标准数据，仅供参考 |