Ti-6Al-4V (Grade 5) vs Ti-6Al-4V ELI (Grade 23): 89% composition overlap. Some similarities but notable differences in alloying elements.
Ti-6Al-4V (Grade 5) vs Ti-6Al-4V ELI (Grade 23)
Side-by-side chemical composition and mechanical property comparison.
Overview
Ti-6Al-4V (Grade 5)
3.7164
The most widely used titanium alloy — accounts for ~50% of all titanium production. Alpha-beta alloy with exceptional strength-to-weight ratio. Used for jet engine components, airframe structures, medical implants (hip/knee), fasteners, and racing components. Biocompatible.
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-6Al-4V (Grade 5) | Ti-6Al-4V ELI (Grade 23) | |
|---|---|---|
| Material Number | 3.7164 | R56401 |
| Category | Titanium | Titanium |
| Standard | ASTM B265 | ASTM F136 |
Chemical composition (wt%)
| Element | Ti-6Al-4V (Grade 5) | Ti-6Al-4V ELI (Grade 23) | Overlap |
|---|---|---|---|
| C | 0–0.08% | ≤ 0.08% | OK |
| V | 3.5–4.5% | 3.5–4.5% | OK |
| Al | 5.5–6.75% | 5.5–6.5% | OK |
| Ti | — | — | — |
Mechanical properties
| Property | Ti-6Al-4V (Grade 5) | Ti-6Al-4V ELI (Grade 23) | Unit |
|---|---|---|---|
| tensile_strength | ≥ 895 | ≥ 860 | MPa |
| yield_strength | ≥ 828 | ≥ 795 | MPa |
| elongation | ≥ 10 | ≥ 10 | % |
Compatibility Assessment
Ti-6Al-4V (Grade 5) and Ti-6Al-4V ELI (Grade 23) share some characteristics (89% overlap) but have notable differences. They may be substitutable in some applications but not all. Verify suitability carefully.
Automated assessment based on composition analysis
Frequently Asked Questions
Is Ti-6Al-4V (Grade 5) the same as Ti-6Al-4V ELI (Grade 23)?
Ti-6Al-4V (Grade 5) and Ti-6Al-4V ELI (Grade 23) have a 89% composition overlap. For most purposes, they can be considered similar.
Can I replace Ti-6Al-4V (Grade 5) with Ti-6Al-4V ELI (Grade 23)?
In many cases, yes. The compositions overlap significantly (89%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between Ti-6Al-4V (Grade 5) and Ti-6Al-4V ELI (Grade 23)?
The main differences are in the following elements: overall alloying content. Ti-6Al-4V (Grade 5) is a Titanium grade, while Ti-6Al-4V ELI (Grade 23) is a Titanium grade.
Related Comparisons
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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.