Titanium Grade 5 & Grade 23 (ELI) - Ti-6Al-4V - Properties, Applications and Technical Data
Titanium Grade 5 (Ti-6Al-4V) is the world's most widely used titanium alloy and accounts for approximately 50% of all titanium used globally. It combines very high strength with low weight, good corrosion resistance and excellent mechanical properties over a wide temperature range. For applications with higher requirements for toughness, fatigue strength and biocompatibility, the ELI variant Titanium Grade 23 (Ti-6Al-4V ELI) is used.
Together, Grade 5 and Grade 23 cover a very wide range of applications in aerospace, medical technology, marine and offshore, energy and other high-performance industrial applications.
Properties
Both Titanium Grade 5 and Grade 23 are alpha+beta alloys where aluminum stabilizes the alpha phase and vanadium stabilizes the beta phase. The difference lies primarily in the content of interstitial elements. The ELI variant (Grade 23) has lower oxygen and iron contents, which provides improved toughness, ductility and fatigue strength.
- Type: Titanium alloy (alpha+beta)
- Alloy: Ti-6Al-4V / Ti-6Al-4V ELI
- Structure: Alpha+beta (hexagonal + cubic)
- Designations: Titanium Grade 5, Titanium Gr5, Titanium Grade 23, Ti-6Al-4V, Ti-6Al-4V ELI, UNS R56400 / R56401, Werkstoffnr 3.7165 / 3.7164
- Common standards: ASTM B265, ASTM B348, ASTM B381, ASTM B367, AMS 4911, AMS 4928, AMS 4930, ASTM F136, ISO 5832-3
Difference between Grade 5 and Grade 23 (ELI)
- Grade 5: Standard alloy for structural and industrial applications
- Grade 23 (ELI): Extra low interstitial content for improved toughness and biocompatibility
- Grade 23 is often used in medical and safety-critical applications
Advantages
- Very high strength to weight ratio
- Excellent fatigue strength
- Good corrosion resistance in marine and industrial applications environments
- Can be heat treated for increased mechanical performance
- Grade 23 offers superior toughness and biocompatibility
Limitations
- Lower corrosion resistance than commercially pure titanium grades in some chemical environments
- More demanding machining compared to CP titanium
- Higher material cost than lower titanium grades
Typical applications
Aerospace
Structural components, fasteners, engine parts and landing gear where low weight and high strength are essential.
Medical technology and implants
Implants, prostheses and surgical instruments, especially Grade 23 (ELI).
Marine and offshore
Highly stressed components in seawater environments where both mechanical strength and corrosion resistance are required.
Energy and Industry
Components for turbines, pressure vessels and advanced machine parts in demanding operating environments.
Titanium Grade 5 - Technical data (annealed condition)
| Yield strength (0.2%): |
830-880 MPa |
| Tensile strength: |
900-950 MPa |
| Elongation at break: |
10-14 % |
| Density: |
4.43 g/cm3 |
| Modulus of elasticity: |
110 GPa |
| Thermal conductivity: |
6.7 W/mK |
| Max temperature: |
350 C |
| Weldability: |
Good - AWS A5.16 ERTi-5 |
Titan Grade 23 ELI - Technical data (annealed condition)
| Yield strength (0.2%): |
795-860 MPa |
| Tensile strength: |
860-930 MPa |
| Elongation at break: |
10-15 % |
| Density: |
4.43 g/cm3 |
| Modulus of elasticity: |
110 GPa |
| Thermal conductivity: |
6.7 W/mK |
| Max temperature: |
350 C (short-term up to 400 C) |
| Weldability: |
Good - AWS A5.16 ERTi-23 |
Why choose HARALD PIHL?
HARALD PIHL has over 100 years of experience in the metal industry and is a specialist in nickel and titanium. We offer fast global delivery, deep material expertise and full certification.
- Europe's largest titanium stock
- ASTM / AMS / ISO standards
- Full material certification (EN 10204 3.1 / 3.2)
- Fast global delivery
- Over 100 years of experience
Contact us for technical advice or a quote.
