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Alloy 230 UNS R06230: Properties and Applications
Alloy 230, also known as UNS R06230, is a nickel-chromium-tungsten-molybdenum alloy that offers exceptional high-temperature strength, oxidation resistance, and thermal stability. Developed for extreme environments, this superalloy is widely used in aerospace, power generation, and industrial processing applications.
Chemical Composition
The unique properties of Alloy 230 stem from its carefully balanced chemical composition:
- Nickel (Ni): 57% (minimum)
- Chromium (Cr): 20-24%
- Tungsten (W): 13-15%
- Molybdenum (Mo): 1-3%
- Iron (Fe): ≤3%
- Carbon (C): 0.05-0.15%
- Lanthanum (La): 0.005-0.05%
Key Properties
High-Temperature Strength
Alloy 230 maintains excellent mechanical properties at temperatures up to 2100°F (1150°C), making it ideal for gas turbine components and combustion systems.
Keyword: Alloy230 UNS R06230
Oxidation Resistance
The high chromium content provides outstanding oxidation resistance in both cyclic and continuous high-temperature service environments.
Thermal Stability
The alloy demonstrates remarkable microstructural stability after prolonged exposure to high temperatures, resisting embrittlement and maintaining ductility.
Corrosion Resistance
Alloy 230 offers excellent resistance to carburization, nitriding, and other forms of high-temperature corrosion.
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 120-150 ksi (827-1034 MPa) |
| Yield Strength (0.2% offset) | 60-90 ksi (414-621 MPa) |
| Elongation | 40-50% |
| Hardness | HRB 80-100 |
Applications
Alloy 230’s unique combination of properties makes it suitable for demanding applications across various industries:
Aerospace Industry
Used in combustion liners, transition ducts, and afterburner components in jet engines due to its ability to withstand extreme thermal cycling.
Power Generation
Ideal for gas turbine components, combustor cans, and transition pieces in both industrial and aircraft-derivative turbines.
Industrial Processing
Employed in furnace components, heat treatment fixtures, and chemical processing equipment where high-temperature strength and corrosion resistance are critical.
Nuclear Applications
Used in certain nuclear reactor components due to its radiation resistance and stability at elevated temperatures.
Fabrication and Welding
Alloy 230 can be fabricated using standard techniques, though its high strength requires more power than conventional