Titanium 6Al-2Sn-4Zr-2Mo, commonly known as Ti-6-2-4-2, is a near-alpha titanium alloy engineered for excellent high-temperature strength, creep resistance, and long-term thermal stability.
This alloy was specifically developed for aerospace applications where Ti-6Al-4V becomes unstable, making it a trusted material for jet engines and hot airframe structures.
Alloy Classification
| Property | Details |
|---|---|
| UNS Designation | R54620 |
| Alloy Type | Near-Alpha Titanium Alloy |
| Design Focus | High-temperature & creep performance |
Typical Mechanical Properties (Annealed)
| Property | Typical Value |
|---|---|
| Tensile Strength | 900 – 1,000 MPa |
| Yield Strength | 830 – 900 MPa |
| Elongation | 10 – 15% |
| Density | ~4.54 g/cm³ |
High-Temperature & Creep Performance
Ti-6-2-4-2 is optimized for continuous service at elevated temperatures, offering outstanding creep resistance and long-term thermal stability.
✔ Excellent creep resistance up to ~450–500 °C
✔ Retains strength better than Ti-6Al-4V
✔ Superior resistance to microstructural degradation
✔ Stable under prolonged thermal cycling
Fabrication & Processing Characteristics
✔ Not heat-treatable for major strength increases
✔ Properties controlled by thermo-mechanical processing
✔ Good forgeability for large near-alpha components
✔ Good weldability with inert gas shielding
✔ More difficult to machine than Ti-6Al-4V
Corrosion & Oxidation Resistance
Ti-6-2-4-2 exhibits excellent resistance to oxidation at elevated temperatures, aircraft fuels, lubricants, and marine environments.
A stable titanium oxide layer provides long-term corrosion protection in aerospace and atmospheric service conditions.
Applications of Titanium 6Al-2Sn-4Zr-2Mo
Jet engine compressor cases
Engine mounts & structural housings
Afterburner structures
Hot airframe components
Missile and space vehicle structures
Why Choose Titanium 6-2-4-2?
✔ Excellent high-temperature strength
✔ Outstanding creep resistance for long service life
✔ Lightweight alternative to steel or nickel alloys
✔ Proven aerospace reliability over decades
✔ Ideal where Ti-6Al-4V cannot meet temperature limits
Titanium 6Al-2Sn-4Zr-2Mo is the go-to near-alpha titanium alloy for hot-section aerospace and defense components where thermal stability, creep resistance, and durability are paramount.