# UNS N07090 Alloy Properties and Applications
## Introduction to UNS N07090 Alloy
UNS N07090 is a high-performance nickel-based superalloy known for its exceptional strength and resistance to oxidation and corrosion at elevated temperatures. This alloy is widely used in demanding applications where reliability and durability are critical.
## Chemical Composition
The chemical composition of UNS N07090 plays a crucial role in its performance characteristics. The primary elements include:
– Nickel (Ni): 55-60%
– Chromium (Cr): 19-23%
– Cobalt (Co): 12-15%
– Molybdenum (Mo): 3-5%
– Titanium (Ti): 2.5-3.5%
– Aluminum (Al): 1.0-1.8%
## Mechanical Properties
Keyword: uns n07090
UNS N07090 exhibits outstanding mechanical properties that make it suitable for high-stress applications:
– Tensile Strength: 1200-1400 MPa
– Yield Strength: 800-1000 MPa
– Elongation: 10-20%
– Hardness: 30-40 HRC
## Physical Properties
The physical characteristics of UNS N07090 include:
– Density: 8.2 g/cm³
– Melting Point: 1300-1350°C
– Thermal Conductivity: 11.4 W/m·K
– Electrical Resistivity: 1.25 μΩ·m
## Heat Treatment
Proper heat treatment is essential for optimizing the properties of UNS N07090:
– Solution Annealing: 1080-1120°C followed by rapid cooling
– Aging Treatment: 700-800°C for 8-16 hours
– Stress Relieving: 650-750°C for 2-4 hours
## Corrosion Resistance
UNS N07090 demonstrates excellent resistance to various corrosive environments:
– Oxidation resistance up to 1000°C
– Resistance to sulfidation and carburization
– Good performance in chloride-containing environments
– Resistance to hot corrosion in gas turbine applications
## Applications
The unique combination of properties makes UNS N07090 suitable for numerous demanding applications:
### Aerospace Industry
– Turbine blades and vanes
– Combustion chambers
– Afterburner components
– Exhaust systems
### Power Generation
– Gas turbine components
– Steam turbine blades
– Nuclear reactor components
– Heat exchangers
### Industrial Applications
– Chemical processing equipment
– Oil and gas components
– High-temperature fasteners
– Furnace components
## Fabrication and Machining
Working with UNS N07090 requires special considerations:
– Machining should be performed with carbide tools
– Welding requires proper preheating and post-weld heat treatment
– Forming operations should be performed at elevated temperatures
– Grinding and finishing require appropriate coolant application
## Comparison with Other Superalloys
UNS N07090 offers several advantages compared to similar alloys:
– Higher creep strength than Inconel 718
– Better oxidation resistance than Waspaloy
– Superior thermal fatigue resistance compared to Rene 41
– More cost-effective than single crystal superalloys
## Conclusion
UNS N07090 is a versatile nickel-based superalloy that combines excellent mechanical properties with outstanding resistance to high-temperature oxidation and corrosion. Its unique combination of characteristics makes it indispensable in aerospace, power generation, and industrial applications where reliability at elevated temperatures is paramount.
