| 尺寸公差 |
| 标准 |
尺寸 |
允许偏差 |
| GB9948-1988 |
外径 |
≤159 |
±1.00% |
| >159 |
±1.25% |
| 壁厚 |
≤20 |
±12.5% |
| >20 |
±10.0% | |
| 标准 |
纵向力学性能 |
交货状态 |
| GB9948-1988 |
钢号 |
抗拉强度(MPa) |
屈服强度(MPa) |
延伸率(%) |
冲击(J) |
布氏硬度 |
| 不小于 |
不大于 |
热轧态 |
| 10 |
330-490 |
205 |
24 |
- |
- |
| 20 |
410-50 |
245 |
21 |
39 |
- |
| 12CrMo |
410-560 |
205 |
21 |
55 |
156 |
回火处理 |
| 15CrMo |
440-640 |
235 |
21 |
47 |
170 |
| 1Cr2Mo |
≥(390) |
(175) |
(22) |
(79) |
(79) |
回火处理 | |
| 化学成份 |
| 钢号 |
C |
Mn |
Si |
Cr |
Mo |
Ni |
S |
P |
| 10 |
0.07-0.14 |
0.35-0.65 |
0.17-0.37 |
≤0.15 |
- |
≤0.25 |
≤0.035 |
≤0.035 |
| 20 |
0.17-0.24 |
0.35-0.65 |
0.17-0.37 |
≤0.25 |
- |
≤0.25 |
≤0.035 |
≤0.035 |
| 12CrMo |
0.08-0.15 |
0.40-0.70 |
0.17-0.37 |
0.40-0.70 |
0.40-0.55 |
≤0.30 |
≤0.035 |
≤0.035 |
| 15CrMo |
0.12-0.18 |
0.40-0.70 |
0.17-0.37 |
0.80-1.10 |
0.40-0.55 |
≤0.30 |
≤0.035 |
≤0.035 |
| 1Cr2Mo |
≤0.15 |
0.30-0.60 |
0.50-1.00 |
2.15-2.85 |
0.45-0.65 |
≤0.30 |
≤0.035 |
≤0.030 | |
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