AMS 4981 Titanium Bar Grade Ti6246
AMS 4981 is a premium aerospace titanium alloy specification covering Ti-6Al-2Sn-4Zr-6Mo (Ti-6246) titanium bars and rods. This alloy is designed for high-temperature, high-stress applications, offering superior strength retention, creep resistance, and fatigue performance compared to conventional Ti-6Al-4V.
As a professional titanium bar supplier, ChinalcoMetal provides AMS 4981 titanium bars with strict chemical control, consistent mechanical properties, and full material traceability for aerospace and high-performance industrial applications.
Specifications:
Diameter: 7mm---230mm
Standard: AMS4981
Grade: Ti6246.
Chemical Composition (Weight %)
| Element | Composition (%) |
|---|---|
| Titanium (Ti) | Balance |
| Aluminum (Al) | 5.5 – 6.5 |
| Zirconium (Zr) | 3.6 – 4.4 |
| Molybdenum (Mo) | 5.5 – 6.5 |
| Tin (Sn) | 1.8 – 2.2 |
| Carbon (C) | ≤ 0.05 |
| Iron (Fe) | ≤ 0.25 |
| Nitrogen (N) | ≤ 0.04 |
| Oxygen (O) | ≤ 0.15 |
| Hydrogen (H) | ≤ 0.015 |
| Other Elements | ≤ 0.30 total |
Mechanical Properties (Typical, Room Temperature)
| Property | Value |
|---|---|
| Tensile Strength, min | 135 ksi / 931 MPa |
| Yield Strength (0.2% offset), min | 125 ksi / 862 MPa |
| Elongation (4D), min | 4% |
Key Performance Advantages of AMS 4981 Titanium Bar
Excellent strength retention at elevated temperatures
Superior creep resistance vs. Ti-6Al-4V
High fatigue strength for cyclic loading environments
Good fracture toughness under aerospace service conditions
Lower density compared to nickel-based superalloys
AMS 4981 is often selected where aluminum or standard titanium alloys reach their performance limits.
Typical Applications
AMS 4981 titanium bars are widely used in:
Aircraft engine structural components
Compressor discs and spacers
High-temperature fasteners
Load-bearing aerospace shafts
Gas turbine and propulsion system parts
High-performance industrial components requiring long-term thermal stability
Available Forms & Supply Capability
ChinalcoMetal supplies AMS 4981 titanium products in:
Titanium Bars (round, square, rectangular)
Titanium Rods
Cut-to-length options available
Processing capabilities include:
Hot forged and rolled bars
Solution treatment & aging
Ultrasonic testing (UT)
Surface peeling, polishing, or machining allowance
Full certification per AMS / ASTM requirements
