Ti 6Al-4V STA (Solution Treated and Aged) is a modified version of Ti 6Al-4V. It is heat treated for high strength in sections under 4" thick. Ti-6Al-4V has excellent hardenability in sections up to 1" thick with strengths as high as 165 ksi.
For maximum strength: solution-treated and aged (STA) condition is: For sheet, 1675-1725°F 5 to 25 minutes, water quench. Age 975°F 4 to 6 hours, air cool. For bars and forgings, 1675-1725°F 1 hour, water quench. Age 975-1025°F 4 to 8 hours, air cool.
Ti 6Al-4V STA is resistant to general corrosion but may be quickly attacked by environments that cause breakdown of the protective oxide. These include hydrofluoric (HF), hydrochloric (HCl), sulfuric and phosphoric acids. Inhibitors may help for the last three but not for HF. Ti 6Al-4V STA resists attack by pure hydrocarbons, and most chlorinated and fluorinated hydrocarbons (provided water has not caused formation of small amounts of HCl and HF).
6Al-4V STA Round Bar
Common Trade Names6-4 STA Titanium, 6-4 STA, Ti 6-4 STA
- High strength to 750°F
- Excellent general corrosion resistance
- High strength-to-weight ratio
- Aerospace, turbine engine and airframe applications
- Medical and dental implants
- High performance Automotive
Density: 0.160 lb/inch3
Melting Range: 2920 - 3020°F
Beta Transus: 1825± 25°F
|Coefficient of Thermal Expansion, in/in°F x 10-6||-||5.3||5.4||5.5|
Btu • Ft/Ft² • Hr°F STA
|Modulus of Elasticity,
psi X 106 STA
Specified, STA sheet & plate
|Tensile Strength, ksi||0.2% Yield Strength, ksi||Elongation in 2", %|