General Purpose Steel Grades
United States Steel produces a variety of steel grades for a wide range of general purpose applications.
U. S. Steel Tubular Products offers a variety of steel grades to meet general-purpose application needs.
General Purpose Steel Grades offered by U. S. Steel:
- API H40 is a general purpose pipe manufactured to API specification 5CT.
- API J55 is a general purpose pipe manufactured to API specification 5CT. Similar to K55 except the minimum tensile strength is lower.
- API K55 is a general purpose pipe manufactured to API specification 5CT. Usually, this grade is most often used in casing applications.
- API N80 Type I is a lower cost alternative to standard Quench and Tempered API N80 (walls less than 0.500 inch). Charpy V-notch impact test absorbed energy results meet API SR16 and are lower than quenched-and-tempered N80.
- API N80Q is a general purpose pipe manufactured to API specification 5CT using a quench and temper process.
- API R95 is an API grade with the same strength range as T95 and USS C95, but without a hardness requirement. This grade is not generally considered for use in sour condensate wells since no hardness restrictions or testing are required and no Sulfide Stress Corrosion Cracking (SSCC) testing is required.
| Product |
Minimum Yield Strength |
Maximum Yield Strength |
Minimum Tensile Strength |
Maximum Hardness |
| API H40 |
40,000 psi |
80,000 psi |
60,000 psi |
None |
| API J55 |
55,000 psi |
80,000 psi |
75,000 psi |
None |
| API K55 |
55,000 psi |
80,000 psi |
95,000 psi |
None |
| API N80 Type 1 |
80,000 psi |
110,000 psi |
100,000 psi |
None |
| API N80Q |
80,000 psi |
110,000 psi |
100,000 psi |
None |
| API R95 |
95,000 psi |
110,000 psi |
105,000 psi |
None |
For pipe sizes and grades not found in the section above, please contact U. S. Steel Tubular Products at 877-893-9461 with your inquiry.