法国 · AFNOR NF
Z 6 CN 18-09
NF E 29-043 — Non alloy and alloy steel bolting for pressure equipement - Specifications
化学成分
| 元素 | min | max | 相似 | 备注 |
|---|---|---|---|---|
| C | 0.07 | |||
| Cr | 17 | 19 | ||
| Mn | 2 | |||
| Ni | 8 | 10 | ||
| P | 0.04 | |||
| S | 0.03 | |||
| Si | 1 |
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 |
|---|---|---|---|---|---|---|
| Threaded bolts Heat treated <= 25 mm | ≥195 | 510–710 | ≥45 | |||
| Threaded bolts Heat treated > 25 mm | ≥185 | 510–710 | ≥45 | |||
| Threaded bolts 热轧或冷拔 <= 25 mm | ≥195 | 510–710 | ≥45 | |||
| Threaded bolts 热轧或冷拔 > 25 mm | ≥185 | 510–710 | ≥45 | |||
| 螺母 | HV 126–192 |