Ti-6Al-4V ELI (Grade 23) vs Ti Grade 23: 95% composition overlap. Very similar materials, likely interchangeable for most applications.
Ti-6Al-4V ELI (Grade 23) vs Ti Grade 23
Side-by-side chemical composition and mechanical property comparison.
Overview
Ti-6Al-4V ELI (Grade 23)
R56401
Extra Low Interstitial version of Ti-6Al-4V (Grade 5) — the gold standard for surgical implants. Reduced O (≤0.13%), Fe (≤0.25%), and C (≤0.08%) versus Grade 5 enhance ductility, fracture toughness, and fatigue strength with some strength reduction. Biocompatible (ASTM F136), MRI-compatible, and spontaneously passivating. Used for orthopedic implants (hip/knee replacements, spinal fixation), dental implants, bone plates/screws, aerospace structural components requiring high damage tolerance, and cryogenic vessels down to -320°C. W.Nr. 3.7165.
Ti Grade 23
Ti-6Al-4V ELI (Extra Low Interstitials) — the medical-grade version of the most common titanium alloy. Lower O, N, C, Fe limits than Grade 5 for improved fracture toughness, ductility, and biocompatibility. ASTM F136 specifies it for surgical implants. Slightly lower strength than Grade 5 but better fatigue crack growth resistance. Used for orthopedic implants (hip/knee), spinal fixation, dental implants, and cryogenic aerospace applications.
| Ti-6Al-4V ELI (Grade 23) | Ti Grade 23 | |
|---|---|---|
| Material Number | R56401 | — |
| Category | Titanium | Titanium |
| Standard | ASTM F136 | ASTM F136 |
Chemical composition (wt%)
| Element | Ti-6Al-4V ELI (Grade 23) | Ti Grade 23 | Overlap |
|---|---|---|---|
| C | ≤ 0.08% | 0–0.08% | OK |
| V | 3.5–4.5% | 3.5–4.5% | OK |
| Al | 5.5–6.5% | 5.5–6.5% | OK |
| Ti | — | — | — |
Mechanical properties
| Property | Ti-6Al-4V ELI (Grade 23) | Ti Grade 23 | Unit |
|---|---|---|---|
| tensile_strength | ≥ 860 | 860–930 | MPa |
| yield_strength | ≥ 795 | 795–860 | MPa |
| elongation | ≥ 10 | 10–15 | % |
Compatibility Assessment
Ti-6Al-4V ELI (Grade 23) and Ti Grade 23 have very similar compositions (95% overlap) and are likely interchangeable for most applications. Verify mechanical properties for your specific use case.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Ti-6Al-4V ELI (Grade 23) the same as Ti Grade 23?
Ti-6Al-4V ELI (Grade 23) and Ti Grade 23 have a 95% composition overlap. For most purposes, they can be considered similar.
Can I replace Ti-6Al-4V ELI (Grade 23) with Ti Grade 23?
In many cases, yes. The compositions overlap significantly (95%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between Ti-6Al-4V ELI (Grade 23) and Ti Grade 23?
The main differences are in the following elements: overall alloying content. Ti-6Al-4V ELI (Grade 23) is a Titanium grade, while Ti Grade 23 is a Titanium grade.
View full data for each material:
Data provided for reference only. Always verify against the applicable specification for critical applications.
All data is for reference only. Equivalents indicate similarity, not identity. Always verify against the applicable specification for safety-critical applications. materialref.com accepts no liability for decisions based on this data.