Ti-6Al-4V (Grade 5) vs Ti-6Al-7Nb: 89% composition overlap. Some similarities but notable differences in alloying elements.
Ti-6Al-4V (Grade 5) vs Ti-6Al-7Nb
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-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-6Al-4V (Grade 5) | Ti-6Al-7Nb | |
|---|---|---|
| Material Number | 3.7164 | — |
| Category | Titanium | Titanium |
| Standard | ASTM B265 | ISO 5832-11 |
Chemical composition (wt%)
| Element | Ti-6Al-4V (Grade 5) | Ti-6Al-7Nb | Overlap |
|---|---|---|---|
| C | 0–0.08% | 0–0.08% | OK |
| V | 3.5–4.5% | — | — |
| Al | 5.5–6.75% | 5.5–6.5% | OK |
| Ti | — | — | — |
Mechanical properties
| Property | Ti-6Al-4V (Grade 5) | Ti-6Al-7Nb | Unit |
|---|---|---|---|
| tensile_strength | ≥ 895 | 900–1050 | MPa |
| yield_strength | ≥ 828 | 800–950 | MPa |
| elongation | ≥ 10 | 8–15 | % |
Compatibility Assessment
Ti-6Al-4V (Grade 5) and Ti-6Al-7Nb 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-7Nb?
Ti-6Al-4V (Grade 5) and Ti-6Al-7Nb have a 89% composition overlap. For most purposes, they can be considered similar.
Can I replace Ti-6Al-4V (Grade 5) with Ti-6Al-7Nb?
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-7Nb?
The main differences are in the following elements: overall alloying content. Ti-6Al-4V (Grade 5) is a Titanium grade, while Ti-6Al-7Nb 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.