Designation
- Grade
- Ti-6Al-4V (C-5)
- UNS
- R56400
- Standard
- ASTM B367
- Family
- Titanium alloys
- Density
- ≈ 4.43 g/cm³
- Usual delivery condition
- As agreed per specification
Chemical composition
| Element | Mass fraction, % |
|---|---|
| Al | 5.5–6.75 |
| V | 3.5–4.5 |
| Fe | ≤ 0.40 |
| O | ≤ 0.25 |
| C | ≤ 0.10 |
| N | ≤ 0.05 |
| H | ≤ 0.015 |
| Ti | bal. |
Main elements only. Phosphorus, sulphur and residual-element limits are specified in the standard and are not reproduced here.
Mechanical properties
| Condition | Tensile strength Rm, min. (MPa) | Yield strength Rp0.2, min. (MPa) | Elongation, min. (%) |
|---|---|---|---|
| As agreed per specification | 895 | 825 | 6 |
Minimum values (or ranges) for separately cast test bars as specified in ASTM B367.
Characteristics
- Corrosion and oxidation behaviour
- Very good resistance in seawater and chloride-bearing media
- Weldability
- Requires inert-gas shielding and specialised procedures
- Machinability
- Difficult; rigid set-ups, low cutting speeds or grinding
- Typical applications
- Aerospace Medical Marine Automotive
International cross-reference
| System | Designation | Relationship |
|---|---|---|
| W.-Nr. (wrought) | 3.7165 (Ti6Al4V) | Comparable properties |
| UNS (wrought) | R56400 (Grade 5) | Comparable properties |
Casting and processing considerations
A brittle oxygen-enriched surface layer (alpha case) forms where metal and shell react and is normally removed by chemical milling. Hot isostatic pressing is widely specified to close internal shrinkage. Titanium casting is a specialised capability; availability, qualification and inspection scope must be confirmed for each project.
Reference data compiled from the cited standards for orientation. Always work from the current edition of the governing specification; values are not a guaranteed LOSTWAX delivery specification.