NIMONIC
Nimonic 80A Rod
Precipitation-Hardened Nickel-Chromium Superalloy Rod for High-Temperature Structural Applications
Nimonic 80A rod delivers exceptional high-temperature strength and creep resistance up to 700°C in a versatile round or customized cross-section form. Engineered for critical aerospace fasteners, pins, and structural components requiring sustained mechanical performance at elevated temperatures.
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%
- Rod Diameter Range
- 6 mm to 50 mm standard
- Tensile Strength (Room Temp, Aged)
- 880-1020 MPa
Standards & Certifications
Product Description
Nimonic 80A rod is produced from vacuum-melted ingots followed by controlled hot forging and rolling to achieve consistent microstructure throughout the cross-section. The manufacturing process carefully controls grain size and distribution to optimize both room-temperature and high-temperature mechanical properties. The rod can be supplied in standard diameters from 6 mm to 50 mm or in custom geometries to meet specific application requirements.
The precipitation-hardened structure of Nimonic 80A rod provides outstanding stress-rupture strength, with values exceeding 280 MPa at 700°C for 1000-hour rupture life. This exceptional high-temperature capability allows engineers to design lighter-weight structures or accept higher operating temperatures compared to conventional materials. The material maintains excellent ductility even when aged, ensuring good damage tolerance and impact resistance.
Machining and finishing operations on Nimonic 80A rod require careful selection of tool geometry and cutting parameters due to the material's work-hardening characteristics and strain-rate sensitivity. However, the material responds well to grinding and precision finishing, enabling production of tight-tolerance aerospace fasteners and critical structural elements. The rod's excellent fatigue strength is maintained even at elevated temperatures, making it ideal for vibration-critical applications.
Nimonic 80A rod serves as the foundational material for numerous critical aerospace and industrial components. From jet engine fasteners to gas turbine rotor studs, from structural pins to bearing supports, this material continues to provide unmatched reliability in service. The extensive qualification history with military and commercial aerospace customers, combined with proven industrial applications, establishes Nimonic 80A rod as the material of choice for demanding high-temperature structural requirements.
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% |
| Rod Diameter Range | 6 mm to 50 mm standard |
| Tensile Strength (Room Temp, Aged) | 880-1020 MPa |
| Yield Strength (0.2% offset, Aged) | 660-800 MPa |
| Elongation (Aged) | 10-16% |
| Stress Rupture (700°C, 1000h) | 280+ MPa |
| Fatigue Strength (650°C, 10⁷ cycles) | 350+ MPa |
| Density | 8.19 g/cm³ |
| Service Temperature Range | -200°C to +700°C continuous |
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 (300°C, Aged) | 920-1050 MPa |
| Tensile Strength (650°C, Aged) | 680-800 MPa |
| Yield Strength (650°C, 0.2% offset) | 500-620 MPa |
| Elongation (Room Temp, Aged) | 10-16% |
| Reduction of Area (Aged) | 30-40% |
| Hardness (Aged, HV) | 390-430 |
| Modulus of Elasticity (Room Temp) | 214 GPa |
| Shear Strength (Room Temp) | 500-600 MPa |
| Impact Strength (Charpy, Room Temp) | 60+ J |
Key Features & Advantages
Applications
Jet Engine Fasteners and Bolts
Manufactured into critical fasteners for jet engine applications where sustained exposure to elevated temperatures combined with high vibration loading demands exceptional fatigue and creep resistance. The material's reliability ensures engine integrity throughout service life.
Gas Turbine Rotor Studs and Bolts
Applied as high-temperature fastening elements in industrial gas turbine rotors where the combination of centrifugal loads and thermal cycling requires superior creep resistance and fatigue strength.
Structural Pins and Pivot Points
Utilized for critical structural pins and bearing supports in aerospace structures operating at elevated temperatures. The material's combination of strength and ductility ensures reliable performance under combined loading conditions.
High-Temperature Valve Components
Employed in specialized valve stems, seats, and guides for aerospace and industrial applications requiring extended service at elevated temperatures with maintained dimensional stability and sealing capability.
Combustor and Casing Components
Applied in combustor liners, casing supports, and thermal protection elements where sustained high-temperature exposure combined with thermal cycling and mechanical loading demands proven superalloy performance.
Specialized Aerospace Structural Elements
Utilized in miscellaneous aerospace structural components including links, brackets, and support structures where the combination of high-temperature strength, excellent weldability, and proven heritage provide reliable solutions.
Frequently Asked Questions
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