Titanium Ti-6Al-4V ELI (Grade 23)
Titanium Ti-6Al-4V ELI (Grade 23) – Ultra-Pure Titanium for Surgical Implants
Titanium Grade 23 (Ti-6Al-4V ELI – Extra Low Interstitial) is the implant-grade variant of Ti-6Al-4V, produced with tighter controls on oxygen, nitrogen, iron, and carbon content. This enhanced purity improves fracture toughness and fatigue performance in the human body, making it the standard material for load-bearing surgical implants per ASTM F136.
Key Properties
- Tensile Strength: 860 MPa
- Yield Strength: 795 MPa
- Density: 4.43 g/cm³
- Purity: Extra Low Interstitial (ELI) — tighter O, N, Fe, C limits
- Biocompatibility: Excellent — ASTM F136 implant grade
- Standards: AMS 4930 / ASTM F136
Common Applications
Orthopedic implants (hip stems, tibial trays, spinal cages), bone screws and fixation plates, dental implant abutments, cardiovascular devices, and other long-term load-bearing surgical implants.
Material properties
| Material name | Titanium Ti-6Al-4V ELI (Grade 23) |
|---|---|
| Type | Titanium |
| Standard code | AMS 4930 / ASTM F136 |
| Tensile strength (MPa) | 860 |
| Yield strength (MPa) | 795 |
| Fatigue strength (MPa) | 510 |
| Elongation (%) | 15 |
| Hardness (Brinell) | 310 |
| Density (g/cm³) | 4.43 |
| Electrical resistivity (µΩ·in) | 170 |
| Thermal conductivity (W/m·K) | 6.7 |
| Melting range (°C) | 1604–1660 |
| Weldability | Good |
| Formability | Fair |
| Shear modulus | 44 |
| Industry code | titanium_gr23 |