1. Standard
API Standard：API 5CT2. Chemical Composition
| Elements | C | Mn | P | S | Si | Cr | Mo | Ni | Cu |
| Min | 0 | 0.30 | 8.00 | 0.90 | |||||
| Max | 0.15 | 0.60 | 0.020 | 0.010 | 1.00 | 10.0 | 1.10 | 0.50 | 0.25 |
| Actual value | 0.10 | 0.45 | 0.008 | 0.0020 | 0.45 | 8.7 | 0.98 | 0.096 | 0.028 |
3. Mechanical Properties
| Mechanical Properties |
Tensile Strength MPa |
Yield Strength MPa |
Hardness HBW/HRC |
0℃，Transverse Impact J 10×10×55 |
Elongation % |
| Min | 655 | 552 | 18 | 27 | 17 |
| Max | 655 | 22 | |||
| Actual value | 705 | 604 | 18.4 | 102 | 26 |
4. Typical Size
| Size |
Outside Diameter mm |
Permissible Variations in Outside Diameter mm |
Wall Thicknessmm |
Average Wall Permissible Variations in Wall Thickness |
| 116.84*27.94 | 116.84 | -0.5%，+1.0%OD | 27.94 | ±8%S |
5. Typical Application Environment
This metal material is used in the petroleum and natural gas industry, such as tubing, casing, couplings, etc.