1. Standard
Standard：API 5CT CustomerTechnology Agreement2. Chemical Composition
Test Method :ASTM A751
| Grade | C | Mn | S | P | Si | Ni | Cr | Cu | Mo | |
| 80H | min | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| max | 0.35 | 1.20 | 0.01 | 0.02 | 0.35 | 0.30 | 1.50 | 0.25 | 0.50 | |
| 0.25 | 0.60 | 0.002 | 0.012 | 0.23 | 0.03 | 0.95 | 0.03 | 0.16 | ||
| 110H | min | -- | -- | -- | -- | -- | -- | 0.40 | -- | 0.10 |
| max | 0.35 | 1.20 | 0.01 | 0.02 | 0.35 | 0.30 | 1.50 | 0.25 | 0.50 | |
| 0.27 | 0.75 | 0.001 | 0.010 | 0.24 | 0.03 | 1.01 | 0.02 | 0.20 | ||
3. Room Temperature Mechanical Properties
| Grade |
Total elongation under load% |
Rm(MPa) | Rp（MPa) | HRC | Elongation % |
CVN/0℃ AVG（J） |
| 80H | 0.5 | ≥655 | 552-655 | ≤23 | ≥20% | API 5CT |
| actual value | 0.5 | 719 | 609 | 20.2 | 30 | 170 |
| 110H | 0.6 | ≥862 | 758-965 | ≤33 | ≥18% | API 5CT |
| actual value | 0.6 | 908 | 819 | 27.9 | 21 | 124 |
4. Typical Size
| Nominal Size | OD | OD Tolerance | WT | WT Tolerance | length |
| 139.7*9.17 | 139.7 | 0~1%D | 9.17 | ±10%S | R3 |
| 177.8*9.19 | 177.8 | 0~1%D | 9.19 | ±10%S | R3 |
| 177.8*10.36 | 177.8 | 0~1%D | 10.36 | ±10%S | R3 |
| 154*14 | 154 | 0~1%D | 14 | ±10%S | ＞8m |
| 201*22 | 201 | 0~1%D | 22 | ±10%S | ＞8m |
5. Application environment
For heavy oil extraction.