Titanium Alloys
Titanium Grade 23 (Ti-6Al-4V ELI) (UNS R56401) — Composition, Properties & Supply
Titanium Grade 23 (Ti-6Al-4V ELI, UNS R56401) is the extra-low-interstitial variant of Grade 5 with oxygen ≤ 0.13%. Higher fracture toughness and cryogenic toughness make it the international standard for orthopaedic and dental implants (ASTM F136 / ISO 5832-3).
What is the chemical composition of Titanium Grade 23 (Ti-6Al-4V ELI)?
| Element | Symbol | Content (wt%) |
|---|---|---|
| Ti | Ti | Balance |
| Al | Al | 5.50–6.50 |
| V | V | 3.50–4.50 |
| Fe | Fe | ≤ 0.25 |
| O | O | ≤ 0.13 |
| C | C | ≤ 0.08 |
| N | N | ≤ 0.05 |
| H | H | ≤ 0.0125 |
Values are typical specification limits. Actual heat analysis is reported on the EN 10204 3.1 mill test certificate supplied with each shipment.
What are the mechanical properties of Titanium Grade 23 (Ti-6Al-4V ELI)?
| Property | Value | Note |
|---|---|---|
| Tensile strength | ≥ 828 MPa | Room temperature |
| Yield strength (0.2% offset) | ≥ 759 MPa | Room temperature |
| Elongation | ≥ 10 % | Gauge length 50 mm / 4D |
| Hardness | ≈ 33 HRC | Brinell / Rockwell |
What are the physical properties of Titanium Grade 23 (Ti-6Al-4V ELI)?
| Property | Value |
|---|---|
| Density | 4.43 g/cm³ |
| Melting range | 1604–1660 °C |
| Thermal conductivity | 6.7 W/m·K |
| Elastic modulus | 113 GPa |
| Maximum service temperature | 350 °C |
What are the key characteristics of Titanium Grade 23 (Ti-6Al-4V ELI)?
- Oxygen ≤ 0.13% gives much higher fracture toughness than Grade 5
- Meets ASTM F136 / ISO 5832-3 implant-grade requirements
- Excellent biocompatibility and osseointegration
- Outstanding cryogenic toughness for LH₂/LOX service
Where is Titanium Grade 23 (Ti-6Al-4V ELI) used?
- Artificial joints, bone plates and screws
- Dental implants and orthodontic devices
- Cryogenic pressure vessels and piping
- Critical aerospace load-bearing parts
- Cardiovascular stents and devices
Which standards and specifications cover Titanium Grade 23 (Ti-6Al-4V ELI)?
What product forms are available?
Frequently asked questions
How does implant-grade TC4 ELI differ from standard TC4?
TC4 ELI (Grade 23) limits oxygen to 0.13% and iron to 0.25%, while standard TC4 (Grade 5) allows oxygen to 0.20%. Lower interstitial content yields higher fracture toughness and better cryogenic and fatigue performance — essential for implants under long-term cyclic load — and requires a fully traceable certificate to ASTM F136.
Need Titanium Grade 23 (Ti-6Al-4V ELI) bar, tube, plate or forgings?
Send the grade, dimensions, standard and quantity. We answer within 10 minutes on working days and quote within 24 hours, with EN 10204 3.1 certification.
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