1. Standard
DomesticStandards：GB/T5310、GB/T9948
ForeignStandards：ASTM A335/A335M、ASME SA-213/SA-213M2.Chemical Requirements
composition, %
| Grade | C | Mn | S | P | Si | Ni | Cr | Cu | Mo | other | |
| 15CrMoG | min | 0.12 | 0.40 | 0.17 | 0.80 | 0.40 | |||||
| max | 0.18 | 0.70 | 0.015 | 0.025 | 0.37 | 1.10 | 0.20 | 0.55 | |||
| actual value | 0.15 | 0.60 | 0.003 | 0.010 | 0.28 | 0.04 | 1.00 | 0.03 | 0.50 | ||
| 12Cr1MoVG | min | 0.08 | 0.40 | 0.17 | 0.90 | 0.25 | |||||
| max | 0.15 | 0.70 | 0.010 | 0.025 | 0.37 | 1.20 | 0.20 | 0.35 | |||
| actual value | 0.13 | 0.60 | 0.005 | 0.012 | 0.29 | 0.03 | 1.10 | 0.02 | 0.30 | ||
| 12Cr5MoI | min | 0.30 | 4.00 | 0.45 | |||||||
| max | 0.15 | 0.60 | 0.015 | 0.025 | 0.50 | 0.60 | 6.00 | 0.20 | 0.60 | ||
| actual value | 0.08 | 0.34 | 0.001 | 0.013 | 0.47 | 0.025 | 4.06 | 0.03 | 0.46 | ||
| P11 | min | 0.05 | 0.30 | 0.50 | 1.00 | 0.44 | |||||
| max | 0.15 | 0.60 | 0.025 | 0.025 | 1.00 | 1.50 | 0.20 | 0.65 | |||
| actual value | 0.10 | 0.43 | 0.004 | 0.012 | 0.66 | 0.06 | 1.19 | 0.03 | 0.48 | ||
| P22 | min | 0.05 | 0.30 | 1.90 | 0.87 | ||||||
| max | 0.15 | 0.60 | 0.025 | 0.025 | 0.50 | 2.60 | 0.20 | 1.13 | |||
| actual value | 0.14 | 0.39 | 0.003 | 0.012 | 0.25 | 0.05 | 2.09 | 0.04 | 0.95 | ||
| P5 | min | 0.30 | 4.00 | 0.45 | |||||||
| max | 0.15 | 0.60 | 0.025 | 0.025 | 0.50 | 6.00 | 0.20 | 0.65 | |||
| actual value | 0.14 | 0.45 | 0.002 | 0.011 | 0.40 | 0.07 | 4.39 | 0.02 | 0.52 | ||
| P9 | min | 0.30 | 0.25 | 8.00 | 0.90 | ||||||
| max | 0.15 | 0.60 | 0.025 | 0.025 | 1.00 | 10.00 | 0.20 | 1.10 | |||
| actual value | 0.09 | 0.39 | 0.002 | 0.007 | 0.43 | 0.04 | 8.69 | 0.03 | 0.95 | ||
|
P91 |
min | 0.08 | 0.30 | 0.25 | 8.00 | 0.85 |
V 0.18-0.25 N 0.03-0.07 Al≤0.02 Cb 0.06-0.10 Ti≤0.01 Zr≤0.01 |
||||
| max | 0.12 | 0.60 | 0.020 | 0.010 | 0.50 | 0.40 | 9.50 | 0.20 | 1.05 | ||
| actual value | 0.10 | 0.50 | 0.012 | 0.003 | 0.35 | 0.04 | 9.0 | 0.03 | 0.96 | All meet theStandard | |
| P92 | min | 0.07 | 0.30 | 8.50 | 0.30 |
V 0.15-0.25 N 0.03-0.07 Al≤0.02 Cb 0.04-0.09 W 1.50-2.00 B 0.001-0.006 Ti≤0.01 Zr≤0.01 |
|||||
| max | 0.13 | 0.60 | 0.020 | 0.010 | 0.50 | 0.40 | 9.50 | 0.20 | 0.60 | ||
| actual value | 0.11 | 0.46 | 0.012 | 0.002 | 0.30 | 0.03 | 9.20 | 0.04 | 0.45 | All meet theStandard | |
3. Mechanical properties
| Grade | Rm(MPa) | Rp0.2（MPa) | HBW | Elongation % |
CVN/0℃ AVG（J） |
| 15CrMoG | 440-640 | ≥295 | ≤170 | ≥21 | ≥ 40 |
|
actual value |
514 | 368 | 161 | 28 | 161 |
| 12Cr1MoVG | 470-640 | ≥255 | -- | ≥21 | ≥ 40 |
| actual value | 479 | 347 | -- | 36 | 275 |
| 12Cr5MoI | 415-590 | ≥205 | ≤163 | ≥30 | ≥ 40 |
| actual value | 488 | 250 | 136 | 38 | 293 |
| P11 | ≥415 | ≥205 | -- | ≥30 | ≥ 40 |
| actual value | 467 | 329 | -- | 38 | 232 |
| P22 | ≥415 | ≥205 | -- | ≥30 | ≥ 40 |
| actual value | 514 | 357 | -- | 34 | 196 |
| P5 | ≥415 | ≥205 | -- | ≥30 | ≥ 40 |
| actual value | 597 | 453 | -- | 34 | 181 |
| P9 | ≥415 | ≥205 | -- | ≥30 | -- |
| actual value | 648 | 491 | -- | 34 | 196 |
| P91 | ≥585 | ≥415 | 190-250 | ≥20 | |
| actual value | 686 | 556 | 218 | 32 | |
| P92 | ≥620 | ≥440 | ≤250 | ≥20 | |
| actual value | 736 | 590 | 227 | 25 |
4. Typical Size
| Nominal Size | OD | OD Tolerance | WT | WT Tolerance/mm | Length |
| 114.3*8.56 | 114.3 | -0.5~1%D | 8.56 | ±10%S | ＞6 |
| 152*8 | 152 | -0.5~1%D | 8 | ±10%S | ＞6 |
| 168*8 | 168 | -0.5~1%D | 8 | ±10%S | ＞6 |
| 168.3*10.97 | 168.3 | -0.5~1%D | 10.97 | ±10%S | ＞6 |
| 219.1*7.1 | 219.1 | -0.5~1%D | 7.1 | ±10%S | ＞6 |
| 219.1*11.13 | 219.1 | -0.5~1%D | 11.13 | ±10%S | ＞6 |
| 168.3*20 | 168.3 | -0.5~1%D | 20 | ±10%S | ＞6 |
| 168.3*34.93 | 168.3 | -0.5~1%D | 34.93 | ±10%S | ＞6 |
| 219.1*24 | 219.1 | -0.5~1%D | 24 | ±10%S | ＞6 |
| 219.1*44.5 | 219.1 | -0.5~1%D | 44.5 | ±10%S | ＞6 |