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Alloy 800H UNS N08810: Properties and Applications in High-Temperature Environments
Alloy 800H (UNS N08810) is a nickel-iron-chromium alloy designed for high-temperature applications. Known for its excellent mechanical strength, resistance to oxidation, and carburization, this alloy is widely used in industries that require materials to withstand extreme conditions. Its unique composition and heat treatment make it a preferred choice for demanding environments.
Key Properties of Alloy 800H UNS N08810
Alloy 800H offers a combination of properties that make it suitable for high-temperature applications:
- High-Temperature Strength: Maintains mechanical integrity at temperatures up to 1500°F (815°C).
- Oxidation Resistance: Forms a protective oxide layer that prevents degradation in oxidizing atmospheres.
- Carburization Resistance: Resists carbon absorption, making it ideal for hydrocarbon processing environments.
- Creep Resistance: Exhibits excellent creep and rupture strength under prolonged stress at elevated temperatures.
- Corrosion Resistance: Performs well in both aqueous and gaseous corrosive environments.
Chemical Composition
The composition of Alloy 800H is carefully balanced to enhance its high-temperature performance:
| Element | Percentage |
|---|---|
| Nickel (Ni) | 30-35% |
| Chromium (Cr) | 19-23% |
| Iron (Fe) | Balance |
| Carbon (C) | 0.05-0.10% |
| Aluminum (Al) | 0.15-0.60% |
| Titanium (Ti) | 0.15-0.60% |
Applications of Alloy 800H UNS N08810
Keyword: Alloy 800H UNS N08810
Due to its exceptional properties, Alloy 800H is used in various high-temperature applications across multiple industries:
- Petrochemical Industry: Used in ethylene pyrolysis furnaces, reformers, and other equipment exposed to high temperatures and corrosive gases.
- Power Generation: Ideal for heat exchangers, boiler components, and turbine parts in fossil fuel and nuclear power plants.
- Heat Treatment Equipment: Employed in radiant tubes, muffles, and retorts for annealing and carburizing processes.
- Chemical Processing: Suitable for reactors, piping, and vessels handling aggressive chemicals at elevated temperatures.
- Aerospace: Used in jet engine components and exhaust systems where high-temperature resistance is critical.
Conclusion
Alloy 800H UNS N08810 is a versatile material engineered to perform in extreme high-temperature environments. Its superior strength, oxidation resistance, and durability make it indispensable in industries such as
