Ti-6Al-2Sn-4Zr-2Mo-0.1Si (abbreviated as Ti-6242) is a near-α titanium alloy containing the α-stabilizing element Al, neutral elements Sn and Zr, the isomorphous β-stabilizing element Mo, and the eutectoid β-stabilizing element Si.
Mo enhances room-temperature and high-temperature tensile strength as well as stability, while the combined effects of Al, Sn, and Zr maintain high-temperature strength regarding long-term stress rupture and creep resistance; the addition of Si induces the precipitation of a dispersed silicide phase, which helps improve high-temperature creep strength.
This titanium alloy retains high strength at temperatures up to 540°C and is primarily used for components such as aero-engine compressor casings and aircraft skins, with a maximum long-term operating temperature of 500°C.
| Element | Content(%) |
|---|---|
| Ti | Remaining |
| Al | 5.5%-6.5% |
| Sn | 1.8%-2.2% |
| Zr | 3.6%-4.4% |
| Mo | 1.8%-2.2% |
| Si | 0.06%-0.13% |
| O | ≤0.15% |
| Fe | ≤0.1% |
| C | ≤0.05% |
| N | ≤0.05% |
| H | ≤0.0125% |
| Y | ≤0.005% |
| Left everyone behind | ≤0.1 |
| Left total | ≤0.3 |
| Property | Value |
|---|---|
| Tensile strength | 621 MPa min. |
| Yield strength (0.2% offset) | 483 MPa min. |
| Elongation | 15% min. |
| Reduction of area | 35% min. |
