Seamless steel tubes for oil casing and tubing in oil wells
Standard: API SPEC 5CT
Material: H40, J55, K55, N80, M65, L80, C90, T95, P110
Wall Thickness: 3.18mm-14.22mm
OD: 48.26mm-177.8mm
Mechanical performance and composition
| Grade | Sub grade | Composition | Mechanical performance | ||||||||||||||||
|
C |
Mn | Mo | Cr | Ni | Cu | P | S | Si | Yield strength (Mpa) | Tensile strength (Mpa) |
Hardness |
||||||||
| Min | Max | Min | Max | Min | Max | Min | Max | Max | Max | Max | Max | Max | Min | Max | Min | HRC | HBW/HBC | ||
| H40 | / | / | / | / | / | / | / | / | / | / | / | 0.03 | 0.03 | / | 276 | 552 | 414 | / | / |
| J55 | / | / | / | / | / | / | / | / | / | / | / | 0.03 | 0.03 | / | 379 | 552 | 517 | / | / |
| K55 | / | / | / | / | / | / | / | / | / | / | / | 0.03 | 0.03 | / | 379 | 552 | 655 | / | / |
| N80 | 1 | / | / | / | / | / | / | / | / | / | / | 0.03 | 0.03 | / | 552 | 758 | 689 | / | / |
| 0 | / | / | / | / | / | / | / | / | / | / | 0.03 | 0.03 | / | 552 | 758 | 689 | / | / | |
| M65 | / | / | / | / | / | / | / | / | / | / | / | 0.03 | 0.03 | / | 448 | 586 | 586 | 22 | 235 |
| L80 | 1 | / | 0.43 | / | 1.90 | / | / | / | / | 0.25 | 0.35 | 0.03 | 0.03 | 0.45 | 552 | 655 | 655 | 23 | 241 |
| 9Cr | / | 0.15 | 0.30 | 0.60 | 0.90 | 1.10 | 8.0 | 10 | 0.5 | 0.25 | 0.02 | 0.01 | 1.0 | 552 | 655 | 655 | 23 | 241 | |
| 13Cr | 0.15 | 0.22 | 1.25 | 1.00 | / | / | 12.0 | 14 | 0.5 | 0.25 | 0.03 | 0.01 | 1.0 | 552 | 655 | 655 | 23 | 241 | |
| C90 | 1 | / | 0.35 | / | 1.00 | 0.25 | 0.75 | / | 1.2 | 0.99 | / | 0.02 | 0.01 | / | 621 | 724 | 689 | 25.4 | 255 |
| 2 | / | 0.50 | / | 1.90 | NL | / | NL | 0.99 | / | 0.03 | 0.01 | / | 621 | 724 | 689 | 25.4 | 255 | ||
| T95 | 1 | / | 0.35 | / | 1.20 | 0.25 | 0.85 | 0.40 | 1.5 | 0.99 | / | 0.02 | 0.01 | / | 655 | 724 | 25.4 | 255 | |
| 2 | / | 0.50 | / | 1.90 | / | / | / | / | 0.99 | / | 0.03 | 0.01 | / | 655 | 758 | 724 | 25.4 | 255 | |
| P110 | / | / | / | / | / | / | / | / | / | / | / | 0.03 | 0.03 | / | 758 | 965 | 862 | / | / |