钢管种类 | 外径(D) | 壁厚(S) | ||
冷拔管 | 钢管外径(mm) | 允许偏差(mm) | 钢管壁厚(mm) | 允许偏差(mm) |
>30~50 | ±0.3 | >3~20 | ±10% |
标准 | 牌号 | 抗拉强度(MPa) | 屈服强度(MPa) | 伸长率(%) | 硬度 | |
GB3087 | 10 | 335~475 | ≥195 | ≥24 | | / |
| 20 | 410~550 | ≥245 | ≥20 | / | |
GB5310 | 20G | 410~550 | ≥245 | ≥24 | | / |
| 20MnG | ≥415 | ≥240 | ≥22 | / | |
| 25MnG | ≥485 | ≥275 | ≥20 | / | |
| 15CrMoG | 440~640 | ≥235 | ≥21 | / | |
| 12Cr2MoG | 450~600 | ≥280 | ≥20 | / | |
| 12Cr1MoVG | 470~640 | ≥255 | ≥21 | / | |
| 12Cr2MoWVTiB | 540~735 | ≥345 | ≥18 | / | |
| 10Cr9Mo1VNb | ≥585 | ≥415 | ≥20 | / | |
ASME SA210 | SA210A-1 | ≥415 | ≥288 | ≥30 | ≤143HB | |
| SA210C | ≥485 | ≥275 | ≥30 | ≤179HB | |
ASME SA213 | SA213 T11 | ≥415 | ≥205 | ≥30 | ≤163HB | |
| SA213 T12 | ≥415 | ≥220 | ≥30 | ≤163HB | |
| SA213 T22 | ≥415 | ≥205 | ≥30 | ≤163HB | |
| SA213 T23 | ≥510 | ≥400 | ≥20 | ≤220HB | |
| SA213 T91 | ≥585 | ≥415 | ≥20 | ≤250HB | |
| SA213 T92 | ≥620 | ≥440 | ≥20 | ≤250HB | |
DIN17175 | ST45.8/Ⅲ | 410~530 | ≥255 | ≥21 | | / |
| 15Mo3 | 450~600 | ≥270 | ≥22 | / | |
| 13CrMo44 | 440~590 | ≥290 | ≥22 | / | |
| 10CrMo910 | 480~630 | ≥280 | ≥20 | / |