Ti-6Al-7Nb vs Ti Grade 23: 85% composition overlap. Some similarities but notable differences in alloying elements.
Ti-6Al-7Nb vs Ti Grade 23
Side-by-side chemical composition and mechanical property comparison.
Overview
Ti-6Al-7Nb
Alpha-beta titanium alloy with Nb replacing V — developed specifically to eliminate vanadium cytotoxicity concerns. Similar mechanical properties to Ti-6Al-4V but with superior biocompatibility and corrosion resistance in body fluids. ISO 5832-11 / ASTM F1295 for surgical implants. Trade name: IMI 367 (originally). Used for hip prostheses, knee replacements, fracture fixation plates, spinal devices, screws, and dental implants.
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-7Nb | Ti Grade 23 | |
|---|---|---|
| Material Number | — | — |
| Category | Titanium | Titanium |
| Standard | ISO 5832-11 | ASTM F136 |
Chemical composition (wt%)
| Element | Ti-6Al-7Nb | Ti Grade 23 | Overlap |
|---|---|---|---|
| C | 0–0.08% | 0–0.08% | OK |
| V | — | 3.5–4.5% | — |
| Al | 5.5–6.5% | 5.5–6.5% | OK |
| Ti | — | — | — |
Mechanical properties
| Property | Ti-6Al-7Nb | Ti Grade 23 | Unit |
|---|---|---|---|
| tensile_strength | 900–1050 | 860–930 | MPa |
| yield_strength | 800–950 | 795–860 | MPa |
| elongation | 8–15 | 10–15 | % |
Compatibility Assessment
Ti-6Al-7Nb and Ti Grade 23 share some characteristics (85% 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-7Nb the same as Ti Grade 23?
Ti-6Al-7Nb and Ti Grade 23 have a 85% composition overlap. For most purposes, they can be considered similar.
Can I replace Ti-6Al-7Nb with Ti Grade 23?
In many cases, yes. The compositions overlap significantly (85%). However, always verify mechanical property requirements and heat treatment compatibility for your specific application.
What is the difference between Ti-6Al-7Nb and Ti Grade 23?
The main differences are in the following elements: overall alloying content. Ti-6Al-7Nb 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.