Grade 6 Titanium Alloy (Ti-5Al-2.5Sn) Overview
Grade 6 Titanium Alloy, also designated as Ti-5Al-2.5Sn, is a near-alpha titanium alloy specifically developed for high-temperature structural applications where creep resistance, thermal stability, and long-term mechanical reliability are critical.
Unlike Grade 5 (Ti-6Al-4V), which is an α-β alloy optimized for room-temperature strength, Grade 6 is designed to retain strength and stability at elevated temperatures up to approximately 400–450°C. This makes it a preferred material for aerospace engine components, hot airframe structures, and high-temperature pressure systems.
Equivalent Standards & Designations
| Standard System | Designation |
|---|---|
| ASTM | Grade 6 (Ti-5Al-2.5Sn) |
| UNS | R55250 |
| AMS | AMS 4904 / AMS 4910 / AMS 4911 |
| ISO | ISO 5832-2 (related applications) |
| DIN / EN | 3.7164 (related near-alpha grades) |
| JIS | TAP6400-equivalent |
| GB (China) | TA6 / TC6 (industry equivalent) |
Chemical Composition of Grade 6 Titanium Alloy
| Element | Content (%) |
|---|---|
| Titanium (Ti) | Balance |
| Aluminum (Al) | 4.5 – 5.5 |
| Tin (Sn) | 2.0 – 3.0 |
| Iron (Fe) | ≤ 0.30 |
| Oxygen (O) | ≤ 0.20 |
| Carbon (C) | ≤ 0.08 |
| Nitrogen (N) | ≤ 0.05 |
| Hydrogen (H) | ≤ 0.015 |
Composition Insight
Aluminum improves strength and oxidation resistance
Tin enhances creep resistance and thermal stability
Absence of vanadium improves high-temperature reliability
Mechanical Properties of Ti-5Al-2.5Sn
Mechanical Properties at Room Temperature (Annealed)
| Property | Typical Value |
|---|---|
| Tensile Strength | ≥ 828 MPa |
| Yield Strength (0.2%) | ≥ 758 MPa |
| Elongation | ≥ 10% |
| Hardness | ~ 300 HB |
| Density | 4.48 g/cm³ |
| Elastic Modulus | ~110 GPa |
High-Temperature Performance
Maintains mechanical integrity at 400–450°C
Excellent creep resistance under long-term thermal load
Stable microstructure during prolonged service
Key Features & Advantages of Grade 6 Titanium Alloy
Superior High-Temperature Stability
Grade 6 outperforms Grade 5 in:
Creep resistance
Thermal fatigue resistance
Long-term dimensional stability
Excellent Strength-to-Weight Ratio
Much stronger than CP titanium grades
Comparable strength to high-strength steels at ~60% weight
Outstanding Corrosion Resistance
Resistant to marine atmospheres and seawater
Excellent performance in oxidizing environments
Stable passive oxide film
Good Weldability & Fabricability
Better weld stability than α-β alloys
Reduced risk of beta phase embrittlement
Suitable for pressure vessels and welded structures
Available Product Forms
Titanium Sheets & Plates
Standards: ASTM B265 / AMS 4910
Thickness: 0.8 mm – 80 mm
Condition: Annealed / Stress relieved
Titanium Pipes & Tubes
Standards: ASTM B861 / B338
Seamless preferred for aerospace
OD: 6 mm – 168 mm
Titanium Bars & Rods
Standard: ASTM B348
Round / square / hex
Hot-rolled and forged
Titanium Forgings
Rings, discs, structural forgings
Aerospace-grade forging capability
Custom shapes per drawing
Typical Applications of Grade 6 Titanium Alloy
Aerospace & Aviation
Engine casings
Compressor components
Hot airframe structures
Marine & Offshore Engineering
High-temperature seawater systems
Offshore structural parts
Corrosion-resistant fasteners
Power & Energy Industry
Heat exchangers
Gas turbine components
Thermal system piping
Defense & Military Equipment
Missile structures
Aircraft support systems
High-reliability welded assemblies
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Our factory
Our factory specializes in the field of international trade of titanium materials, professionally producing high-quality series products such as titanium tubes, titanium bars, titanium plates, titanium wires, and titanium strips. The factory is equipped with internationally advanced production and testing equipment, including precision forging units, high-speed cold rolling mills, vacuum melting furnaces, CNC spinning machines, continuous drawing production lines, and automated surface treatment systems. Coupled with precision testing instruments such as spectrometers and ultrasonic flaw detectors, we ensure precise control over the entire process from raw materials to finished products. We are committed to providing global customers with titanium products that offer excellent performance and a complete range of specifications through stable and reliable processes and strict quality management, meeting the application needs of high-end industries such as energy, chemical, aerospace, and medical fields.
Titanium product packaging
We place great emphasis on the transportation safety and delivery quality of our products. All titanium materials are packaged using strict industrial-grade solutions: titanium tubes and bars undergo anti-rust treatment, are tightly wrapped with waterproof stretch film, and then placed in reinforced wooden or iron boxes lined with moisture-proof paper, with fillers added to prevent sliding and collisions during transportation. Titanium plates and strips are covered with protective film, fitted with edge protectors, separated layer by layer with moisture-proof paper, loaded onto sturdy wooden or steel pallets, and securely fastened with steel straps. Fine titanium wires are neatly coiled onto specialized spools and encapsulated in sealed boxes that are waterproof and dustproof. Each packaging unit is accompanied by clear product labels, material certificates, and moisture-proof indicators, ensuring that the goods remain intact, clearly labeled, and safely delivered to global customers through long-distance sea freight and multimodal transportation.
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