Physical Properties
The physical properties of grade 5 Ti-6Al-4V alloy are tabulated below.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 4.43 g/cm3 | 0.160 lb/in3 |
| Melting point | 1674 °C | 3045 °F |
Mechanical Properties
The following table shows mechanical properties of grade 5 Ti-6Al-4V alloy.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | ≥ 895 MPa | ≥ 130000 psi |
| Yield strength | ≥ 828 MPa | ≥ 120000 psi |
| Poisson’s ratio | 0.31 | 0.31 |
| Elastic modulus | 105-120 GPa | 15200-17400 ksi |
| Shear modulus | 41-45 GPa | 5950-6530 ksi |
| Elongation at break | ≥ 10 % | ≥ 10 % |
Thermal Properties
The thermal properties of grade 5 Ti-6Al-4V alloy are tabulated below.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@0.000-100°C/32-212°F) | 9 µm/m°C | 5 µin/in°F |
| Thermal conductivity | 6.60W/mK | 45.8 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to grade 5 Ti-6Al-4V alloy are as follows:
| AMS 4928 | AMS 4965 | AMS 4967 | MIL T-81915 | MIL T-9046 |
| AMS 4920 | AMS 4954 | ASTM B265 | MIL T-81556 | MIL T-9047 |
| AMS 4911 | AMS 4935 | ASTM B348 | MIL F-83142 | SPS M618 |
| AMS 4906 | AMS 4934 | ASTM B381 | GE C50TF12 | DMS 1570 |
| AMS 4905 | AMS 4930 | DIN 3.7164 |
Annealing
Annealing can be performed by holding at 732°C (1350°F) between 1/4 and 4 h, then furnace cooled to 566°C (1050°F) followed by air cooling. In case of forgings and bars, furnace cooling is not required.
Heat Treatment
Solution treatment of the material is done at 904-954°C (1660-1750° F) for 2 h, which is followed by water quench process.
Forging
Rough forging of grade 5 Ti-6Al-4V alloy should be performed at 982°C(1800°F), and finished at 968°C (1750°F).
Hot Working
Hot working enhances the overall ductility of the material.
Cold Working
Cold working features of this material is same as that of a moderately tempered austenitic stainless steel. Post-work annealing is recommended to re- attain favorable performance properties.
Aging
Aging of grade 5 Ti-6Al-4V alloy can be performed at 538°C (1000°F) for 4 h, and then air cooled.
Applications
Grade 5 Ti-6Al-4V alloy is a popular titanium alloy and is widely used in several industries including aerospace, power generation, marine, and offshore industries.