| 尺寸公差 |
| 外径(D) |
≤159 |
>159 |
| 外径允许偏差 |
±1.0%(最小为±0.5mm) |
±1.25% |
| 壁厚(S) |
≤20 |
S>20 |
D≥351 |
| 壁厚允许偏差 |
+15%,-10%(最小为+0.45mm,-0.30mm) |
±10% |
±15% | |
|
纵向力学性能
|
| 类别 |
纲级 |
抗拉强度(MPa) |
屈服点(MPa)≥ |
延伸率（%）≥ |
| 碳钢和碳锰钢 |
360 |
360-480 |
215 |
24 |
| 410 |
410-530 |
235 |
22 |
| 490 |
490-610 |
285 |
21 |
| 1Cr0.5Mo |
440 |
440-600 |
275 |
22 |
| 2.25Cr1Mo |
410 |
410-560 |
235 |
20 |
| 490 |
490-640 |
275 |
16 | |
| 化学成份 |
| 分类 |
钢级 |
C |
Si |
Mn |
P≤ |
S≤ |
Cr |
Mo |
Ni |
Cu |
Sn |
W |
总量 |
| 碳钢和碳锰钢 |
360 |
≤0.17 |
≤0.35 |
0.40-0.80 |
0.040 |
0.040 |
≤0.25 |
≤0.10 |
≤0.30 |
≤0.30 |
- |
- |
≤0.70 |
| 410 |
≤0.21 |
≤0.35 |
0.40-1.20 |
0.040 |
0.040 |
≤0.25 |
≤0.10 |
≤0.30 |
≤0.30 |
- |
- |
≤0.70 |
| 440 |
≤0.23 |
≤0.35 |
0.80-1.50 |
0.040 |
0.040 |
≤0.25 |
≤0.10 |
≤0.30 |
≤0.30 |
- |
- |
≤0.70 |
| 1Cr0.5Mo |
440 |
0.10-0.18 |
0.10-0.35 |
0.40-0.70 |
0.040 |
0.040 |
0.70-1.10 |
0.45-0.65 |
≤0.30 |
≤0.25 |
≤0.03 |
≤0.020 |
- |
| 2.25Cr1Mo |
410 |
0.08-0.15 |
0.10-0.35 |
0.40-0.70 |
0.040 |
0.040 |
2.00-2.50 |
0.90-1.20 |
≤0.30 |
≤0.25 |
≤0.03 |
≤0.020 |
- | | |
