AMS 4928 Ti-6Al-4V Bar
AMS 4928 covers Ti-6Al-4V in bar, forging, and ring forms. Governed by stringent aerospace material specifications, this alpha-beta titanium alloy combines a minimum tensile strength of 895 MPa (130 ksi) with a density of 4.43 g/cm³, achieving a strength-to-weight ratio unmatched by most steel or aluminum alternatives.
AMS 4928 Ti-6Al-4V Bar, also known as titanium alloy 6-4, is a high-performance material that is known for its exceptional strength-to-weight ratio, corrosion resistance, and biocompatibility. The typical applications of Titanium 6AL4V are structural components for aerospace, motorsport, and medical implants.
AMS 4928 Ti-6Al-4V Bar Key Attributes
- Aerospace-Grade Durability
- Retains mechanical integrity at temperatures up to 400°C (750°F)
- Exceptional fatigue resistance for cyclic-load components (e.g., landing gear, engine mounts)
- Low thermal expansion minimizes deformation in extreme environments
Chemical Composition
|
Element |
Weight |
|
Aluminum |
5.5 – 6.75% |
|
Vanadium |
3.5 – 4.5% |
|
Iron |
0.30% max |
|
Oxygen |
0.20% max |
|
Carbon |
0.08% max |
|
Nitrogen |
0.05% max |
|
Hydrogen |
0.015% max |
|
Yttrium |
0.005% |
|
Titanium |
Balance |
|
Other Elements |
0.40% |
Mechanical Properties
|
0.2% Proof Stress |
Tensile Strength |
Elongation |
Reduction of area |
Hardness |
|
MPA |
MPA |
% |
% |
HRC |
|
Min |
Min |
Min |
Min |
|
|
862 |
900 |
10 |
25 |
36 |
-
Corrosion Defense
Withstands saltwater, chlorides, and industrial chemicals without coatings
Oxide layer regeneration prevents pitting/crevice corrosion in marine atmospheres
Manufacturing Versatility
Hot-forming compatibility for complex forgings and rings
Machinable to tight tolerances in annealed condition (AMS 4928 Class 1/2)
-
Applications
Aerostructures: Turbine blades, fasteners, and wing fittings
Biomedical: Non-toxic, osseointegration-friendly implants (ASTM F136 compliant)
Motorsport: Connecting rods, valve springs, exhaust systems
-
AMS 4928 Compliance Highlights
Mandatory vacuum arc re-melting for defect-free microstructure
Controlled interstitial elements (O₂ ≤ 0.20%, Fe ≤ 0.30%)
Full traceability from mill to final heat treatment (annealing/STA per AMS-H-81200)
A notable characteristic of the AMS 4928 Ti-6Al-4V bar is its exceptional strength-to-weight ratio. This means that it is particularly well suited for applications where minimizing weight is critical, as is often the case in the aerospace sector. Though relatively lightweight, 6AL4V demonstrates impressive mechanical properties that allow it to endure substantial forces and stresses without any detriment to its structural integrity.
A key attribute of the 6AL4V (AMS 4928) alloy is its notable biocompatibility. When combined with its impressive strength properties and robust corrosion resistance, this biocompatibility makes 6AL4V highly suitable for biomedical applications. As a result, Ti-6Al-4V is used widely in the production of orthopedic implants, dental implants, and a diverse range of surgical instrumentation.
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