ISO 23515
Designation system for titanium and titanium alloys based on composition and impurity levels.
Titanium designations
Designation system for titanium and titanium alloys based on composition and impurity levels.
Data edition: ISO 23515:2022
Material requirements. Defined by product form.
Designation system for titanium and titanium alloys based on composition and impurity levels.
Table 1 gives the Ti2 impurity limits. The 6 and 4 in Ti-6Al-4V are nominal alloying percentages, not acceptance ranges. The 2022 base edition is shown; Amendment 1:2024 is a separate publication.
Find your material grade
2 material references with ISO 23515 data.
ISO 23515 properties
Select a table to compare requirements.
| Grade / designation | N | Fe | O | Al, nominal | V, nominal |
|---|---|---|---|---|---|
| Titanium Grade 2 Ti2 | ≤0.03 | ≤0.30 | ≤0.25 | — | — |
| Titanium Grade 5 Ti-6Al-4V | — | — | — | 6 | 4 |
Composition in mass %. ≤ denotes a maximum; ≥ denotes a minimum; paired values are ranges. — means no numerical limit is provided in the cited data, not zero.
| Grade / designation | Form | Thickness (mm) | Condition | Test direction | Rp0.2 (MPa) | Rp1.0 min (MPa) | Rm (MPa) | A80 min (%) | A min (%) | Other requirements |
|---|---|---|---|---|---|---|---|---|---|---|
| Titanium Grade 2 Ti2 | — | — | — | — | — | — | — | — | — | — |
| Titanium Grade 5 Ti-6Al-4V | — | — | — | — | — | — | — | — | — | — |
—: this designation standard does not prescribe sheet, plate or strip tensile acceptance values. See ISO 7209 for flat-product requirements.
Specification source
Reference edition: ISO 23515:2022.