NIMONIC
Nimonic 80A Sheet
Premium Precipitation-Hardened Nickel-Chromium Superalloy Sheet for Elevated Temperature Service
Nimonic 80A sheet is a precipitation-hardened nickel-chromium superalloy designed for sustained operation at temperatures up to 700°C. Offering superior high-temperature strength, excellent corrosion and oxidation resistance, and outstanding fatigue properties, it is the material of choice for demanding aerospace and industrial turbine applications.
Quick Specifications
- Nickel Content
- 75% minimum (balance + Cr, Ti, Al, Co, Fe)
- Chromium Content
- 19-23%
- Titanium Content
- 2.0-2.6%
- Aluminium Content
- 1.0-1.8%
- Sheet Thickness Range
- 0.5 mm to 6.0 mm standard
- Tensile Strength (Room Temp, Aged)
- 860-1000 MPa
Standards & Certifications
Product Description
Nimonic 80A is a wrought nickel-chromium-titanium-aluminium superalloy engineered to maintain exceptional mechanical properties at elevated temperatures. The addition of titanium and aluminium elements enables precipitation hardening, where fine gamma-prime phases form during controlled heat treatment, significantly strengthening the alloy without loss of ductility. This unique combination of properties is achieved through careful composition control (minimum 75% nickel base) and sophisticated manufacturing processes that ensure consistent microstructure and performance.
The alloy exhibits outstanding creep resistance with stress rupture strength exceeding 280 MPa at 700°C over 1,000 hours. This exceptional high-temperature capability stems from the coherent precipitation of gamma-prime (Ni3(Ti,Al)) phases within the gamma matrix. The material maintains good ductility and damage tolerance even at elevated temperatures, making it suitable for applications where thermal fatigue and vibration are concerns. Oxidation resistance is remarkable, with minimal scaling even after prolonged exposure to 700°C in air.
Manufacturing flexibility is a key strength of Nimonic 80A sheet. The material can be supplied in various thickness ranges from 0.5 mm to 6 mm and in multiple temper conditions (solution-treated and aged, or aged only) to meet specific application requirements. The alloy is weldable using established welding techniques, though careful control of thermal cycles is necessary to maintain the precipitation-hardened microstructure. Both conventional machining and precision grinding operations are feasible, making the material compatible with standard fabrication processes.
Nimonic 80A sheet continues to be the benchmark material for turbine blade platforms, fasteners, casings, and other critical components in military and civil aviation turbine engines. Industrial gas turbine manufacturers rely on this material for industrial power generation applications where reliability and long service intervals are paramount. The extensive design database, proven performance history spanning decades, and established quality assurance standards make Nimonic 80A the preferred superalloy sheet for engineering professionals seeking high-temperature solutions.
Specifications
| Nickel Content | 75% minimum (balance + Cr, Ti, Al, Co, Fe) |
| Chromium Content | 19-23% |
| Titanium Content | 2.0-2.6% |
| Aluminium Content | 1.0-1.8% |
| Sheet Thickness Range | 0.5 mm to 6.0 mm standard |
| Tensile Strength (Room Temp, Aged) | 860-1000 MPa |
| Yield Strength (0.2% offset, Aged) | 640-750 MPa |
| Elongation (Aged) | 12-18% |
| Stress Rupture (700°C, 1000h) | 280+ MPa (minimum) |
| Creep Rate (700°C, 140 MPa) | <0.1% per 1000 hours |
| Density | 8.19 g/cm³ |
| Melting Point | 1320-1350°C (estimated range) |
Chemical Composition
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 75.0 (min) |
| Chromium (Cr) | 19.0-23.0 |
| Cobalt (Co) | 0.8-1.5 |
| Titanium (Ti) | 2.0-2.6 |
| Aluminium (Al) | 1.0-1.8 |
| Iron (Fe) | 1.0 (max) |
| Manganese (Mn) | 1.0 (max) |
| Silicon (Si) | 1.0 (max) |
| Carbon (C) | 0.08 (max) |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (540°C, Aged) | 760-900 MPa |
| Tensile Strength (650°C, Aged) | 650-750 MPa |
| Yield Strength (540°C, Aged, 0.2% offset) | 540-660 MPa |
| Elongation (Aged, Room Temp) | 12-18% |
| Reduction of Area | 35-45% |
| Hardness (Aged, HV) | 380-420 |
| Modulus of Elasticity (Room Temp) | 214 GPa |
| Modulus of Elasticity (650°C) | 180 GPa |
| Thermal Fatigue Resistance | Excellent (superior to most nickel alloys) |
Key Features & Advantages
Applications
Turbine Blade Platforms and Casings
Extensively used in military and civil aviation turbine engines for blade platforms, shrouds, and casings operating at temperatures to 700°C. The material's combination of strength and thermal fatigue resistance ensures reliable multi-service-life performance.
Fasteners and High-Temperature Bolts
Applied as precision fasteners, bolts, and rivets in turbine engines and advanced aerospace structures where elevated temperature service combined with vibration loading demands superior creep and fatigue resistance.
Industrial Power Generation Turbines
Utilized in industrial gas turbine components, combustor casings, and heat exchangers for power generation applications. The material enables extended operating intervals and higher turbine inlet temperatures, improving efficiency.
Aerospace Afterburner Components
Employed in afterburner liners, flame holders, and thermal protection components where sustained exposure to high temperatures and thermal cycling is combined with demanding mechanical loads.
High-Performance Heat Exchanger Tubing
Specified for heat exchanger tubing and manifolds in aerospace and industrial applications where extended service at elevated temperatures, combined with pressurized fluid containment, requires superior creep resistance.
Specialized Aerospace Structural Components
Applied in miscellaneous aerospace structures and assemblies where the combination of high-temperature strength, excellent weldability, and proven heritage make it the material of choice for critical applications.
Frequently Asked Questions
What is the maximum continuous operating temperature for Nimonic 80A sheet?
How does the heat treatment affect Nimonic 80A properties?
Can Nimonic 80A sheet be welded?
What creep characteristics should be expected at elevated temperature?
How does Nimonic 80A perform under thermal cycling conditions?
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