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UNS N07090 Alloy Properties and Applications

The UNS N07090 alloy, also known as Waspaloy, is a nickel-based superalloy renowned for its exceptional high-temperature strength and corrosion resistance. This alloy is widely used in aerospace, industrial gas turbines, and other demanding applications where performance under extreme conditions is critical.

Key Properties of UNS N07090

UNS N07090 exhibits several remarkable properties that make it suitable for high-stress environments:

• High temperature strength up to 980°C (1800°F)
• Excellent creep resistance
• Good oxidation and corrosion resistance
• Outstanding fatigue resistance
• Maintains mechanical properties at elevated temperatures

Chemical Composition

The typical composition of UNS N07090 includes:

• Nickel (Ni): ~58% (base)
• Chromium (Cr): 18-21%
• Cobalt (Co): 12-15%
• Molybdenum (Mo): 3-5%
• Aluminum (Al): 1.2-1.6%
• Titanium (Ti): 2.75-3.25%

Mechanical Properties

At room temperature, UNS N07090 typically demonstrates:

• Tensile strength: 1200-1400 MPa
• Yield strength: 800-1000 MPa
• Elongation: 10-20%
• Hardness: 35-45 HRC

Heat Treatment

UNS N07090 requires specific heat treatment to achieve optimal properties:

1. Solution treatment at 1080°C (1975°F)
2. Rapid cooling (air or oil quench)

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3. Aging at 845°C (1550°F) for 4 hours
4. Final aging at 760°C (1400°F) for 16 hours

Applications of UNS N07090

The unique combination of properties makes UNS N07090 ideal for:

• Aircraft turbine engine components (disks, shafts, blades)
• Industrial gas turbine parts
• High-temperature fasteners
• Rocket engine components
• Nuclear reactor components
• Chemical processing equipment

Advantages Over Other Alloys

Compared to similar nickel-based superalloys, UNS N07090 offers:

• Better creep resistance than Inconel 718
• Higher temperature capability than Waspaloy
• Superior oxidation resistance to many cobalt-based alloys
• Excellent fabricability considering its high strength

When selecting materials for extreme environments, UNS N07090 provides an excellent balance of strength, durability, and temperature resistance that makes it a preferred choice for critical aerospace and industrial applications.