Titanium 5-2.5
5Al-2.5Sn (Grade 6)
Material Data Sheet
Grade 6 Ti-5Al-2.5Sn alloy has high service temperature of 480°C (896°F), medium strength, and excellent weldability and fabricability. This alloy has good oxidation resistance and microstructure stability; however it is not heat-treatable.
Chemical Composition
| Element | Content (%) |
|---|---|
| Titanium, Ti | 89.85 – 94 |
| Aluminum, Al | 4-6 |
| Tin, Sn | 2-3 |
| Iron, Fe | ≤ 0.50 |
| Oxygen, O | ≤ 0.20 |
| Carbon, C | ≤ 0.10 |
| Nitrogen, N | ≤ 0.030 |
| Hydrogen, H | ≤ 0.015 |
| Other, each | ≤ 0.050 |
| Other, total | ≤ 0.30 |
Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 4.48 g/cm3 | 0.162 lbs/in3 |
| Melting Point | ≤ 1590°C | ≤ 2890°F |
Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 517 MPa | 75000 psi |
| Yield strength | 827 MPa | 120000 psi |
| Elastic modulus | 110 – 125 GPa | 16000 – 18100 ksi |
| Shear modulus | 48 GPa | 6960 ksi |
| Elongation at break | 15% | 15% |
| Hardness, Brinell | 320 | 320 |
| Hardness, Knoop | 363 | 363 |
| Hardness, Rockwell C | 36 | 36 |
| Hardness, Vickers | 349 | 349 |
Thermal Properties
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@0.000-100°C/32-212°F) | 9.40 µm/m°C | 5.22 µin/in°F |
| Thermal conductivity | 7.80 W/mK | 54.1 BTU in/hr.ft².°F |
Applications
Grade 6 Ti-5Al-2.5Sn alloy is used in the following application areas:
- Gas turbine engine casings and rings
- Aerospace structural parts, aircraft engine and airframe.
- Chemical processing equipment
Other Designations
Equivalent materials to grade 6 Ti-5Al-2.5Sn alloy are as follows:
- ASTM B265 Grade6
- ASTM B348 Grade6
- ASTM B381 Grade6
- MIL-T-9046
- MIL-T-9047
- AMS 4926
- AMS 4910
- AMS 4966
- AMS 4953
- MIL F-83142
- MIL T-81556
- MIL T-81915
Key Words: Ti 5-2.5, 5-2.5, 5Al 2.5 Sn, UNS R54520, Grade 6
