Nimonic 80A丨UNS N07080
Nimonic 80A is a precipitation-hardened nickel-chromium superalloy strengthened by titanium and aluminum additions. It combines excellent high-temperature strength, creep resistance, oxidation resistance, and fatigue performance up to approximately 815°C. Nimonic 80A is widely used in gas turbine blades, exhaust valves, aerospace fasteners, combustion equipment, and other critical high-temperature components.
Nimonic 80A Alloy
Nimonic 80A (UNS N07080 / W.Nr. 2.4952 & 2.4631) is one of the most widely used age-hardenable nickel-based superalloys for elevated-temperature service. Developed for aerospace and gas turbine applications, it offers an outstanding combination of creep rupture strength, oxidation resistance, fatigue resistance, and metallurgical stability.
The alloy derives its strength from gamma-prime (γ’) precipitation hardening produced by titanium and aluminum additions. Compared with conventional heat-resistant stainless steels, Nimonic 80A provides significantly better mechanical property retention at elevated temperatures, making it suitable for highly stressed components operating under cyclic thermal conditions.
Nimonic 80A At a Glance
| Key Attribute | Value |
|---|---|
| Alloy Name | Nimonic 80A |
| UNS Number | N07080 |
| Werkstoff Number | 2.4952 / 2.4631 |
| Material Type | Nickel-Chromium Superalloy |
| Strengthening Mechanism | Gamma Prime (γ’) Precipitation Hardening |
| Density | 8.19 g/cm³ |
| Melting Range | 1320 – 1365°C |
| Maximum Service Temperature | Up to 815°C |
| Main Strength | Oxidation & Creep Resistance |
| Typical Forms | Bar, Forging, Ring, Plate, Wire |
| Main Applications | Turbine Blades, Exhaust Valves, Fasteners |
| Key Standards | AMS 5828 |
Features of Nimonic 80A
- Excellent oxidation resistance up to 815°C
- Outstanding creep rupture strength
- High fatigue and stress rupture resistance
- Excellent thermal stability
- Good resistance to scaling and hot gases
- Long service life under cyclic thermal loading
- Suitable for turbine and aerospace applications
- Good forgeability and machinability
- Proven performance in demanding high-temperature environments
- Widely recognized aerospace-grade superalloy
Chemical Composition of Nimonic 80A
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Balance |
| Chromium (Cr) | 18.0 – 21.0 |
| Titanium (Ti) | 1.8 – 2.7 |
| Aluminum (Al) | 1.0 – 1.8 |
| Cobalt (Co) | ≤ 2.0 |
| Iron (Fe) | ≤ 3.0 |
| Manganese (Mn) | ≤ 1.0 |
| Silicon (Si) | ≤ 1.0 |
| Carbon (C) | ≤ 0.10 |
| Boron (B) | ≤ 0.008 |
| Zirconium (Zr) | ≤ 0.15 |
| Sulfur (S) | ≤ 0.015 |
Physical Properties of Nimonic 80A
| Property | Value |
|---|---|
| Density | 8.19 g/cm³ |
| Melting Range | 1320 – 1365°C |
| Electrical Resistivity | 1.15 μΩ·m |
| Thermal Conductivity | 11.2 W/m·K |
| Specific Heat Capacity | 435 J/kg·K |
| Modulus of Elasticity | 210 GPa |
Mechanical Properties of Nimonic 80A
| Property | Metric Value |
|---|---|
| Tensile Strength | 1250 – 1400 MPa |
| Yield Strength (0.2% Offset) | 780 – 1000 MPa |
| Elongation | 15 – 25% |
| Hardness | HB 250 – 350 |
(Age Hardened Condition)
Corrosion Resistance
Nimonic 80A offers excellent resistance to oxidation, scaling, and hot gas corrosion at elevated temperatures. Its chromium-rich protective oxide layer provides reliable protection against thermal degradation in combustion environments.
The alloy performs particularly well in:
- High-temperature oxidizing atmospheres
- Combustion gases
- Thermal cycling conditions
- Turbine exhaust environments
- Industrial furnace applications
High Temperature Performance
Nimonic 80A maintains excellent mechanical integrity under long-term exposure to temperatures approaching 815°C.
Key advantages include:
- Excellent creep rupture resistance
- Superior oxidation resistance
- High fatigue strength
- Resistance to thermal fatigue cracking
- Long-term microstructural stability
- Proven aerospace service history
Available Forms
J&A Alloy supplies Nimonic 80A in:
- Round Bar
- Forged Bar
- Plate
- Sheet
- Wire
- Ring Forgings
- Disc Forgings
- Billets
- Custom Machined Components
Applications of Nimonic 80A
Aerospace
- Turbine blades
- Turbine discs
- Engine fasteners
- Combustion hardware
Automotive
- Exhaust valves
- Turbocharger components
Power Generation
- Gas turbine components
- Hot section hardware
Industrial Furnaces
- Heat-resistant fixtures
- Burner assemblies
Nimonic 80A vs Other Nickel Alloys
| Alloy | Main Advantage | Service Temperature | Typical Applications |
|---|---|---|---|
| Nimonic 80A | Oxidation & Creep Resistance | Up to 815°C | Turbine Blades, Exhaust Valves |
| Nimonic 901 | Fatigue & Creep Strength | Up to 650°C | Discs, Shafts, Rotors |
| Inconel 718 | Strength & Corrosion Resistance | Up to 700°C | Aerospace, Oil & Gas |
| Waspaloy | Higher Temperature Strength | Up to 870°C | Turbine Components |
Welding & Fabrication
Forming
Nimonic 80A can be hot forged and hot worked using conventional superalloy processing methods.
Machining
- Machine in annealed condition when possible
- Use carbide tools
- Maintain rigid setups
- Apply adequate coolant
Welding
The alloy can be welded using GTAW, GMAW, and resistance welding processes. Post-weld heat treatment is recommended to restore optimum properties.
Standards & Equivalent Grades
| Standard | Designation |
|---|---|
| UNS | N07080 |
| Werkstoff | 2.4952 / 2.4631 |
| AMS | AMS 5828 |
| BS HR | Nimonic 80A |
Frequently Asked Questions
What is Nimonic 80A?
Nimonic 80A is a precipitation-hardened nickel-chromium superalloy developed for high-temperature aerospace and turbine applications.
What is the UNS number of Nimonic 80A?
UNS N07080.
What temperature can Nimonic 80A withstand?
Nimonic 80A can operate continuously at temperatures up to approximately 815°C.
Is Nimonic 80A corrosion resistant?
Yes. It offers excellent oxidation and scaling resistance in elevated-temperature environments.
What is Nimonic 80A used for?
Typical applications include turbine blades, exhaust valves, aerospace fasteners, combustion chambers, and gas turbine components.
Can Nimonic 80A be welded?
Yes. GTAW and GMAW welding processes are commonly used, followed by appropriate heat treatment.
Why Choose J&A Alloy
Specialized Superalloy Manufacturer
J&A Alloy focuses on nickel alloys, cobalt alloys, and high-performance superalloys for critical industries worldwide.
Strict Quality Assurance
- PMI Testing
- Chemical Analysis
- Mechanical Testing
- Ultrasonic Inspection
- Third-Party Inspection Available
Complete Documentation
- EN 10204 3.1 Certification
- Mill Test Certificate (MTC)
- Full Material Traceability
Custom Manufacturing
- Precision Forgings
- Custom Dimensions
- Machining Services
- Fast Delivery
Global Supply Experience
Serving aerospace, energy, petrochemical, defense, and industrial customers worldwide.
