When engineers and medical manufacturers need a lightweight, high-strength, and biocompatible titanium alloy, Ti-6Al-7Nb (Titanium-6Aluminum-7Niobium) is a top choice. Known for its exceptional mechanical properties and corrosion resistance, this alloy is widely used in surgical implants, aerospace components, and high-performance engineering parts.
In this guide, we’ll break down the key Ti-6Al-7Nb material properties, its advantages over similar alloys, and why it’s the preferred material for critical applications.
Ti-6Al-7Nb Material Properties: Strength, Biocompatibility & More
1. Chemical Composition
Ti-6Al-7Nb consists of:
-
Titanium (Ti) – Base material (87%)
-
Aluminum (Al, 6%) – Enhances strength and heat resistance
-
Niobium (Nb, 7%) – Improves biocompatibility and corrosion resistance
This composition makes it safer for medical use than alloys containing vanadium (like Ti-6Al-4V).
2. Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 900–1050 MPa |
| Yield Strength | 800–900 MPa |
| Elongation | 10–15% |
| Hardness (HV) | 300–350 |
| Density | 4.52 g/cm³ (Lightweight) |
These Ti-6Al-7Nb material properties make it ideal for load-bearing implants, such as hip joints and dental screws.
3. Corrosion & Wear Resistance
-
Highly resistant to body fluids, saltwater, and industrial chemicals.
-
Excellent fatigue strength, ensuring long-term durability in implants and aircraft parts.
4. Biocompatibility (Medical Use)
-
ISO 5832-11 & ASTM F1295 certified for surgical implants.
-
Non-toxic (no vanadium) – Unlike Ti-6Al-4V, niobium eliminates potential cytotoxicity risks.
How Ti-6Al-7Nb Compares to Other Titanium Alloys
Ti-6Al-7Nb vs. Ti-6Al-4V
| Property | Ti-6Al-7Nb | Ti-6Al-4V |
|---|---|---|
| Biocompatibility | Superior (Niobium-based) | Good (Vanadium concerns) |
| Medical Use | Preferred for implants | Limited due to vanadium |
| Strength | Comparable (~900-1050 MPa) | Slightly higher (~950-1100 MPa) |
Why choose Ti-6Al-7Nb?
✔ Safer for long-term implants
✔ Better corrosion resistance in harsh environments
✔ Approved for permanent medical devices
Applications of Ti-6Al-7Nb
Thanks to its outstanding Ti-6Al-7Nb material properties, this alloy is used in:
-
Medical: Hip/knee replacements, dental implants, bone screws
-
Aerospace: Jet engine components, landing gear parts
-
Industrial: High-stress fasteners, chemical processing equipment
Conclusion: Why Ti-6Al-7Nb is the Best Choice for High-Performance Needs
If you need a strong, lightweight, and biocompatible titanium alloy, Ti-6Al-7Nb outperforms alternatives like Ti-6Al-4V in medical safety and corrosion resistance. Its mechanical properties make it perfect for implants, aerospace, and industrial uses.
Looking for Ti-6Al-7Nb suppliers and Ti-6Al-7Nb material properties or custom machining? Contact us for high-quality titanium solutions! Email:linhui@lhtitanium.com
