Titanium Grade 5 (Ti-6Al-4V)
UNS R56400
Overview
The most widely used titanium alloy — accounting for approximately 50% of global titanium consumption. The 6% aluminum and 4% vanadium additions create an alpha-beta alloy with dramatically higher strength than commercially pure grades while retaining excellent corrosion resistance. Heat treatable to even higher strength levels. The standard material for aerospace structures, medical implants, and high-performance marine components.
Chemical Composition (wt%)
| Element | Min | Max |
|---|---|---|
| Ti (Titanium) | 87.7 | 91 |
| Al (Aluminum) | 5.5 | 6.75 |
| V (Vanadium) | 3.5 | 4.5 |
| Fe (Iron) | — | 0.4 |
| O (Oxygen) | — | 0.2 |
| C (Carbon) | — | 0.08 |
| N (Nitrogen) | — | 0.05 |
Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | ≥ 895 MPa (130 ksi) | annealed |
| Yield Strength (0.2%) | ≥ 828 MPa (120 ksi) | annealed |
| Elongation | ≥ 10% | annealed |
| Hardness | 30 – 36 HRC | annealed (330 HB typical) |
| Density | 4.43 g/cm³ | — |
Physical Properties
| Property | Value |
|---|---|
| Melting Point | 1604 – 1660 °C |
| Thermal Conductivity | 6.7 W/m·K (at 20°C) |
| Beta Transus | 995 °C |
Corrosion Resistance
Comparable to Grade 2 in most environments with slightly reduced corrosion resistance in reducing acids due to the vanadium content. Excellent resistance to seawater, chloride solutions, and oxidizing media. Not as formable as Grade 1 or 2 — requires hot working for severe forming operations. The strength-to-corrosion-resistance ratio is unmatched by any other engineering metal.
Typical Applications
Related Standards
Available Products in This Material
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