API T95 Casing
Data verifiedT95 is the stronger sibling of C90 in the API 5CT sour-service family: 95 ksi yield with the same 25.4 HRC hardness ceiling and sulfide-stress-cracking test regime. It serves deep sour wells where C90’s strength runs out but P110-class hardness would be an SSC hazard.
Chemical composition
| Element | Content (%) |
|---|---|
| P | ≤0.030 |
| S | ≤0.030 |
| Note | API 5CT controls T95 by strength, hardness and SSC testing — no C/Mn composition limits |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Yield strength | 655–758 MPa (95–110 ksi) |
| Tensile strength | ≥724 MPa (105 ksi) |
| Hardness | ≤25.4 HRC (sour-service cap) |
| Density | 7.85 g/cm³ |
Heat treatment
Quenched and tempered; through-wall hardness survey and SSC qualification as for C90, at a higher strength level.
Equivalent grades
| Standard | Designation |
|---|---|
| aisi | API 5CT T95 |
| gb | T95 (GB/T 19830) |
Compare side by side: API T95 Casing vs API C90 Casing · API T95 Casing vs API P110 Casing
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Deep sour gas wells, high-pressure H₂S production casing, completions where both strength and NACE compliance are mandatory.
Processing: Order strictly to API 5CT with the sour-service supplementary requirements; substitution with quenched commercial 95 ksi pipe is not permitted in sour wells.
Need API T95 Casing from stock?
Steel.Wiki is sponsored by Shenzhen NewAsia Special Steel (Nasteel), a special-steel stockholder in Shenzhen stocking mold, tool and alloy steels with EN 10204 3.1 certification.
Ask for a quotationVisit NasteelSource: API 5CT published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.