德国 · DIN
EStE 255
DIN 17125:1997 — Square and rectangular fine grain steel tubes (hollow sections) for structural steelwork; technical delivery conditions
化学成分
| 元素 | min | max | 相似 | 备注 |
|---|---|---|---|---|
| Al | 0.02 | If nitrogen is additionally fixed by niobium | If nitrogen is additionally fixed by niobium | |
| C | 0.16 | |||
| Cr | 0.3 | |||
| Cr+Cu+Mo | 0.45 | |||
| Cu | 0.2 | |||
| Mn | 0.5 | 1.3 | ||
| Mo | 0.08 | |||
| N | 0.02 | |||
| Nb | 0.03 | |||
| Nb+Ti+V | 0.05 | |||
| Ni | 0.3 | |||
| P | 0.025 | |||
| S | 0.015 | |||
| Si | 0.4 |
力学性能
| 热处理 / 状态 | 屈服强度 | 抗拉强度 | 伸长率 | 断面收缩率 | 冲击功 | 硬度 |
|---|---|---|---|---|---|---|
| 空心棒材 正火 t <= 20 mm | ≥255 Upper Yield Stress | 360–480 | ≥25 Parallel to the tube axis | ≥65 Charpy V Notch (-20°C) |
高/低温力学性能
| 热处理 / 状态 | 温度 ℃ | min | 备注 |
|---|---|---|---|
| 空心棒材 正火 t <= 20 mm | -20 | 65 | Charpy V Notch |