Grade 5 titanium, also known as Ti-6Al-4V, is an alpha-beta titanium alloy containing 6% aluminum and 4% vanadium. It combines high strength, lightweight, excellent corrosion resistance, and good heat resistance. This makes it the most commonly used titanium alloy in aerospace, medical, marine, and industrial applications.
80-90% of all titanium alloys used worldwide are Grade 5.
Common Product Forms
Titanium Bars & Rods
Sheets & Plates
Forgings (discs, rings, blocks)
Tubes & Pipes (seamless/welded)
Wire (medical/spring grade)
Fasteners (bolts, screws, nuts)
CNC-machined aerospace or medical parts
Chemical Composition (ASTM B348, B265)
|
Element |
Content (%) |
|
Titanium (Ti) |
Balance |
|
Aluminum (Al) |
5.5 – 6.75 |
|
Vanadium (V) |
3.5 – 4.5 |
|
Oxygen (O) |
≤ 0.20 |
|
Iron (Fe) |
≤ 0.40 |
|
Carbon (C) |
≤ 0.08 |
|
Nitrogen (N) |
≤ 0.05 |
|
Hydrogen (H) |
≤ 0.015 |
|
Others (each) |
≤ 0.10 |
|
Others (total) |
≤ 0.40 |
Mechanical Properties (Annealed Condition)
|
Property |
Value |
|
Tensile Strength |
≥ 895 MPa (130 ksi) |
|
Yield Strength (0.2% OS) |
≥ 828 MPa (120 ksi) |
|
Elongation |
≥ 10% |
|
Elastic Modulus |
~113 GPa |
|
Hardness |
~334 HV (~36 HRC) |
|
Density |
4.43 g/cm³ |
|
Strength-to-Weight Ratio |
Very High |
Note: Can be heat-treated to even higher strengths (up to 1200 MPa).
Thermal Properties
|
Property |
Value |
|
Melting Point |
~1,660 °C (3,020 °F) |
|
Thermal Conductivity |
~6.7 W/m·K |
|
Coefficient of Thermal Expansion |
~8.6 × 10⁻⁶ /°C |
|
Specific Heat Capacity |
~560 J/kg·K |
|
Max Operating Temp (Air) |
~400–600 °C |
Applications of Grade 5 Titanium
1.Aerospace & Aviation
Turbine components
2.Airframe and engine parts
Fasteners, brackets, structural components
3.Industrial & Energy
High-strength heat exchangers
Pressure vessels and valves
Offshore oil & gas components
4.Medical
Surgical implants (bone screws, plates, hip/knee parts)
Dental implants and abutments
Surgical tools
5.Motorsports & Automotive
Exhaust systems
Suspension parts
High-performance bolts and rods
6.Marine
Propeller shafts
Underwater fasteners
High-performance pump parts
Relevant Standards
ASTM B348-Bars and Rods
ASTM B265-Sheet and Plate
ASTM B381-Forgings
ASTM B338 / B861-Tubes and Pipes
AMS 4911 / AMS 4928-Aerospace Grade Material
ISO 5832-3-Medical Implants
Advantages of Grade 5 Titanium
High strength at low weight
Corrosion-resistant in many environments (including seawater, oxidizing acids)
Heat-treatable for tailored performance
Biocompatible-approved for implants
Excellent fatigue resistance
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