# 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 industrial applications where reliability and durability are critical.
## Chemical Composition
The chemical composition of UNS N07090 plays a crucial role in its performance characteristics:
– Nickel (Ni): 58-63%
– Chromium (Cr): 19-23%
– Cobalt (Co): 13-17%
– Molybdenum (Mo): 4-6%
– Aluminum (Al): 1.0-1.7%
– Titanium (Ti): 2.5-3.3%
– Iron (Fe): ≤1.0%
Keyword: uns n07090
– Carbon (C): ≤0.08%
– Boron (B): ≤0.01%
– Zirconium (Zr): ≤0.07%
## Mechanical Properties
UNS N07090 exhibits impressive mechanical properties across a wide temperature range:
Property | Value
Tensile Strength (Room Temp) | 1250-1450 MPa
Yield Strength (Room Temp) | 850-1000 MPa
Elongation | 10-20%
Hardness (Rockwell C) | 30-40
Creep Resistance | Excellent up to 980°C (1800°F)
## Physical Properties
The physical characteristics of UNS N07090 include:
– Density: 8.22 g/cm³
– Melting Range: 1290-1345°C (2350-2450°F)
– Thermal Expansion Coefficient: 12.6 × 10⁻⁶/°C (20-1000°C)
– Thermal Conductivity: 11.4 W/m·K at 100°C
– Electrical Resistivity: 1.25 μΩ·m at 20°C
## Key Features and Advantages
UNS N07090 offers several notable advantages:
1. Exceptional high-temperature strength: Maintains mechanical properties at temperatures up to 980°C (1800°F)
2. Outstanding oxidation resistance: Forms a protective oxide layer that prevents further degradation
3. Superior creep resistance: Performs well under constant stress at high temperatures
4. Good fabricability: Can be machined and formed using standard techniques
5. Excellent thermal fatigue resistance: Withstands repeated thermal cycling
## Heat Treatment
Proper heat treatment is essential for optimizing the properties of UNS N07090:
The standard heat treatment process involves solution annealing at 1080-1120°C (1975-2050°F) followed by rapid cooling. Aging treatments at 700-800°C (1290-1470°F) for 16-24 hours are typically applied to achieve optimal precipitation hardening.
## Applications of UNS N07090
This alloy finds extensive use in various high-performance applications:
### Aerospace Industry
UNS N07090 is commonly used in aircraft turbine engines for components such as turbine blades, discs, and combustion chambers due to its ability to withstand extreme temperatures and stresses.
### Power Generation
The alloy is employed in gas turbine components for power plants, including turbine wheels, shafts, and casings, where long-term reliability at high temperatures is essential.
### Industrial Gas Turbines
UNS N07090 is utilized in hot section components of industrial gas turbines that operate under severe conditions of temperature and stress.
### Chemical Processing
Its corrosion resistance makes it suitable