Ti-5Al-2Zr-2Sn-4Mo-4Cr
UNS R58650
Description
Ti-5Al-2Zr-2Sn-4Mo-4Cr titanium alloy, also known as Ti-17 titanium alloy, is an alpha-rich near-beta alloy that is sometimes classified as an alpha-beta alloy. Ti-5Al-2Zr-2Sn-4Mo-4Cr offers superior strength properties over Ti-6Al-4V and has good ductility, good fracture toughness, good low-cycle and high cycle fatigue properties. Unlike other beta or near-beta alloys, Ti-5Al-2Zr-2Sn-4Mo-4Cr offers and high creep resistance at intermediate temperatures (up to 430 °C (800 °F)). It is commonly used as a high strength deep hardening alloy for compressor discs and other large components.
Chemical Component
| Ti | Fe | O | N | H | Al | Cr | Mo | Sn | Zr |
|---|---|---|---|---|---|---|---|---|---|
| Balance | 0.3% max | 0.08-0.13% | 0.04% max | 0.0125% max | 4.5-5.5% | 3.5-4.5% | 3.5-4.5% | 1.5-2.5% | 1.5-2.5% |
Basic Information
| Items | Ti-5Al-2Zr-2Sn-4Mo-4Cr |
|---|---|
| Catalog | ACAM-Ti-A010 |
| Density | 0.168 lb/in3 (4.65 g/cm3) |
| Modulus of Elasticity | 114 Gpa (16500 ksi) |
| Coefficient of Thermal Expansion | At 68-212 °F (20-100 °C): 4.72 µin/in°F (8.50 µm/m°C) |
| Thermal Conductivity | 54.1 BTU in/hr.ft2.°F (7.80 W/mK) |
| Beta Transus | 1635 ± 15 °F (890.5 ± 15 °C) |
Material Forms
Alfa Chemistry offers Ti-5Al-2Zr-2Sn-4Mo-4Cr in the form of Billet and Plate.
Mechanical Properties
- Annealed (1450 °F – A.Q.)
| Properties | Ultimate Tensile Strength | >0.2% Yield Strength | Elongation | Reduction of Area |
|---|---|---|---|---|
| Minimum tensile properties | 100 ksi (689 Mpa) | 85 ksi (586 Mpa) | 10% | - |
| Typical tensile properties | 144 ksi (993 Mpa) | 122 ksi (841 Mpa) | 14% | 46% |
Additional Properties
Heat Treatment: Ti-5Al-2Zr-2Sn-4Mo-4Cr alloy is double solution treated 860 °C (1580 °F) for 2h and 800 °C (1472 °F) for 4h.
Aging: Ti-5Al-2Zr-2Sn-4Mo-4Cr can be aged at 620 °C (1148 °F) for 8h.
Specifications
Billet and Plate: AMS 4995, ASTM B-265
Applications
Ti-5Al-2Zr-2Sn-4Mo-4Cr can be used in a variety of applications, including:
- A disk for fans and compressors in aero engines
- Engine parts fasteners and hydraulic pipes, etc.
- Compressor discs
- Heavy section forgings for gas turbine engine components
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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