1. Standard
API Standard：API 5CT2. Chemical Composition
| Elements | C | Mn | P | S | Si | Cr | Mo | Ni | Cu |
| Min | 0.15 | 0.25 | 12.0 | - | |||||
| Max | 0.22 | 1.00 | 0.020 | 0.010 | 1.00 | 14.0 | - | 0.50 | 0.25 |
| Actual value | 0.17 | 0.46 | 0.017 | 0.0054 | 0.335 | 12.7 | 0.034 | 0.13 | 0.048 |
3. Mechanical Properties
| Mechanical Properties |
Tensile Strength MPa |
Yield Strength MPa |
Hardness HRC |
0℃，Longitudinal Impact J 10×10×55 |
Elongation % |
||
| Min | 655 | 552 | 27 | 20 | |||
| Max | 655 | 23 | |||||
| Actual value | 743 | 585 | 18.7 |
73.8（-10℃，Longitudinal Impact J 10×7.5×55） |
27 |
4. Typical Size
| Size |
Outside Diameter mm |
Permissible Variations in Outside Diameter mm |
Wall Thickness Mm |
Average Wall Permissible Variations in Wall Thickness |
| 114.3×8.56 | 114.3 | -0.5%到+1.0% | 8.56 | ±10%S |