Ti-6Al-4V, also known as Grade 5 Titanium, is one of the most commonly used titanium alloys worldwide. When produced in compliance with AMS 4928, it meets stringent aerospace industry standards, ensuring reliable performance under demanding conditions. This article explores the significance of AMS 4928, the material properties of Ti-6Al-4V, and its critical applications across industries.
What is AMS 4928?
AMS 4928 is a specification issued by SAE International (Society of Automotive Engineers) that defines the requirements for titanium alloy bar, forging, and forging stock, specifically for aerospace-grade materials.
This standard ensures that the Ti-6Al-4V alloy (UNS R56400) meets required levels of:
- Chemical composition
- Mechanical properties
- Heat treatment
- Surface condition
- Dimensional tolerances
Materials certified to AMS 4928 are often used in critical aerospace components, where performance, consistency, and traceability are non-negotiable.
Chemical Composition of Ti-6Al-4V (AMS 4928)
| Element | Content (wt%) |
|---|---|
| Titanium (Ti) | Balance |
| Aluminum (Al) | 5.5 – 6.75 |
| Vanadium (V) | 3.5 – 4.5 |
| Iron (Fe) | ≤ 0.40 |
| Oxygen (O) | ≤ 0.20 |
| Carbon (C) | ≤ 0.08 |
| Nitrogen (N) | ≤ 0.05 |
| Hydrogen (H) | ≤ 0.015 |
| Other Elements (Total) | ≤ 0.30 |
This composition gives the alloy an ideal balance of strength, corrosion resistance, and workability, making it versatile for both structural and high-performance applications.
Mechanical Properties (Typical)
When processed under AMS 4928, Ti-6Al-4V typically achieves:
| Property | Value |
|---|---|
| Tensile Strength | ≥ 895 MPa |
| Yield Strength (0.2%) | ≥ 828 MPa |
| Elongation | ≥ 10% |
| Reduction of Area | ≥ 25% |
| Hardness | ≤ 334 HB |
These properties can vary slightly depending on the diameter and heat treatment, but the alloy consistently provides high strength and durability without significant weight.
Key Benefits of Ti-6Al-4V (AMS 4928)
- Exceptional Strength-to-Weight Ratio – Ideal for weight-sensitive aerospace and automotive designs.
- Corrosion Resistance – Performs well in oxidizing and chloride-rich environments.
- Good Weldability and Machinability – Can be fabricated into complex geometries.
- High Temperature Performance – Maintains strength at elevated temperatures up to ~400°C.
- Biocompatibility – Though AMS 4928 is not medical-certified, the same alloy in ASTM F136 form is used in implants.
Applications Across Industries
Due to the AMS 4928 certification, Ti-6Al-4V bars are commonly used in:
- Aerospace: Structural parts, landing gear, fasteners, turbine engine components.
- Motorsport & Automotive: High-strength, lightweight performance parts.
- Industrial Equipment: Offshore drilling tools, heat exchangers, pressure vessels.
- Precision Engineering: High-performance mechanical parts requiring fatigue resistance.
For medical applications, the alloy must meet ASTM F136 or ISO 5832-3, but the base material is essentially identical in composition.
Why Choose AMS 4928 Certified Material?
For manufacturers and engineers requiring traceability, consistent quality, and aerospace-grade assurance, AMS 4928 certification guarantees:
- Compliance with aerospace quality control
- Certified mechanical and chemical test reports
- Proven material pedigree for flight safety
Whether you’re building components for aircraft, racing cars, or high-spec industrial systems, AMS 4928 material ensures you’re using the most trusted titanium alloy standard in the market.
Conclusion
Ti-6Al-4V under AMS 4928 represents the gold standard for high-performance titanium bars and forgings. With its combination of strength, weight savings, corrosion resistance, and processability, it’s no surprise that this alloy has become the workhorse of the aerospace and high-tech industries.
For more information or to request a quote, contact Shaanxi NiTiCu Metal Co., Ltd. — a professional supplier of aerospace-grade titanium materials.
Email: sales@niticu.com
Phone/WeChat/WhatsApp: +86 13335373172
Website: www.niticu.com
