NIMONIC Alloy 80A (UNS N07080) Properties and Applications
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NIMONIC Alloy 80A (UNS N07080) Properties and Applications
Introduction to NIMONIC Alloy 80A
NIMONIC Alloy 80A, also known by its UNS designation N07080, is a nickel-chromium alloy that belongs to the family of superalloys. Developed for high-temperature applications, this alloy exhibits excellent mechanical strength, corrosion resistance, and oxidation resistance at elevated temperatures. It is widely used in industries where components are subjected to extreme thermal and mechanical stress.
Chemical Composition
The chemical composition of NIMONIC Alloy 80A plays a crucial role in its performance. The primary elements include:
- Nickel (Ni): 70-75% (provides the base matrix)
- Chromium (Cr): 18-21% (enhances oxidation and corrosion resistance)
- Aluminum (Al): 1.0-1.8% (contributes to precipitation hardening)
- Titanium (Ti): 1.8-2.7% (works with aluminum to strengthen the alloy)
- Iron (Fe): ≤ 3.0% (residual element)
- Carbon (C): ≤ 0.10% (kept low to minimize carbide formation)
Mechanical Properties
NIMONIC Alloy 80A exhibits outstanding mechanical properties, especially at high temperatures:
- Tensile Strength: 900-1200 MPa (at room temperature)
- Yield Strength: 600-800 MPa (at room temperature)
- Elongation: 15-25% (indicates good ductility)
- Hardness: 250-350 HB (Brinell hardness)
- Creep Resistance: Excellent performance under prolonged stress at high temperatures
Thermal Properties
The alloy’s thermal properties make it suitable for high-temperature environments:
Keyword: NIMONIC Alloy 80A UNS N07080
- Melting Range: 1320-1365°C (2410-2490°F)
- Operating Temperature: Up to 815°C (1500°F) for continuous service
- Thermal Expansion: 13.5 μm/m·°C (20-100°C)
- Thermal Conductivity: 11.7 W/m·K (at 20°C)
Key Characteristics
NIMONIC Alloy 80A offers several distinctive characteristics:
- Excellent high-temperature strength
- Superior oxidation and corrosion resistance
- Good creep and rupture properties
- Maintains mechanical properties at elevated temperatures
- Resistant to thermal fatigue
Applications of NIMONIC Alloy 80A
Due to its exceptional properties, NIMONIC Alloy 80A finds applications in various demanding industries:</p