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Product Introduction
6Al-4V ELI Grade 23 Square Bar is a medical-grade (α+β) titanium alloy with ultra-low interstitial elements. Compared to standard Grade 5, 6Al-4V ELI Grade 23 Square Bar offers better ductility, fracture toughness, and biocompatibility, making it a go-to choice for critical medical implants, aerospace precision parts, and high‑reliability industrial components. Its UNS number is R56401.
Key standards and where they're used
- ASTM B348 – general industrial bars
- ASTM F136 – surgical and orthopedic implants
- ISO 5832-3 – medical device certification
- AMS 4930 – aerospace precision parts
- EN 3.7165 – European medical/industrial compliance
Chemical Composition (wt.%, per ASTM F136/ASTM B348
|
Element |
Content |
Role/Impact |
|
Titanium (Ti) |
Balance |
Base metal |
|
Aluminum (Al) |
5.50–6.50 |
Stabilizes α-phase; boosts strength |
|
Vanadium (V) |
3.50–4.50 |
Stabilizes β-phase; improves hardenability |
|
Iron (Fe) |
≤0.25 |
Controlled impurity (lower than Grade 5's 0.30 max) |
|
Oxygen (O) |
≤0.13 |
ELI critical limit (Grade 5: ≤0.20); preserves ductility |
|
Carbon (C) |
≤0.08 |
Controls grain growth |
|
Nitrogen (N) |
≤0.05 |
Prevents embrittlement |
|
Hydrogen (H) |
≤0.015 |
Avoids hydrogen-induced cracking |
|
Other Individual Elements |
≤0.10 |
Trace impurity control |
|
Total Other Impurities |
≤0.40 |
Sum of trace elements |
Main applications
- Medical: This is the alloy you'll find in orthopedic implants like joint replacements and bone plates, as well as dental implants and surgical instruments. The reason is simple – excellent biocompatibility and high fatigue strength.
- Aerospace: Used for precision airframe parts, landing gear components, and fasteners, where lightweight and high reliability matter.
- Industrial: Shows up in cryogenic vessels, chemical processing equipment, and pressure vessels – applications that need both corrosion resistance and toughness.
- Additive manufacturing: Because of its low impurity levels, it prints consistently, so it's a popular material for 3D‑printed medical implants and complex aerospace parts.
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