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6Al-4V STA
Product Information
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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).
Common Trade Names
6-4 STA Titanium, 6-4 STA, Ti 6-4 STA
Inventory
6Al-4V STA Titanium Round Bar
Specifications
UNS R56400, Werkstoff 3.7164, 3.7165, EN 3.7164, 3.7165
AMS: 4965, 6930, T-9047, T-9046
Chemical Composition, %
| Al | V | C | N | O | H | Fe | Y | Others, Each | Others, Total | Ti | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MIN | 5.5 | 3.5 | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| MAX | 6.75 | 4.5 | 0.08 | 0.05 | 0.2 | 0.0125 | 0.3 | 0.005 | 0.1 | 0.4 | Balance |
Features
- High strength to 750°F
- Excellent general corrosion resistance
- High strength-to-weight ratio
Applications
- Aerospace, turbine engine and airframe applications
- Fasteners
- Medical and dental implants
- High performance Automotive
Physical Properties
Density: 0.160 lb/inch3
Melting Range: 2920 - 3020°F
Beta Transus: 1825± 25°F
| Temperature, °F | 70 | 200 | 400 | 600 |
| Coefficient of Thermal Expansion, in/in°F x 10-6 | - | 5.3 | 5.4 | 5.5 |
| Thermal Conductivity, Btu • Ft/Ft² • Hr°F STA |
4.0 | 4.3 | 5.2 | 6.1 |
| Modulus of Elasticity, psi X 106 STA |
16.7 | 16.0 | 15.0 | 14.0 |
Mechanical Properties
Specified, STA sheet & plate
| Tensile Strength, ksi | 0.2% Yield Strength, ksi | Elongation in 2", % |
| 170 | 160 | 10 |
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