Incoloy 800, also known as UNS N08800, is a nickel-chromium alloy with good strength and excellent resistance to oxidation and carburization in high-temperature atmospheres. It also resists corrosion in many aqueous environments. The alloy maintains a stable, austenitic structure during prolonged exposure to high temperatures.
Applications of Incoloy 800:
Incoloy 800 is commonly used in various industries including petrochemical, chemical processing, power generation, and heat treating.
It finds applications in furnace components such as radiant tubes, muffles, and annealing covers due to its resistance to oxidation and carburization at high temperatures.
In the petrochemical industry, Alloy 800 is used in heat exchangers, steam methane reformers, and catalytic crackers where it provides excellent resistance to corrosive environments.
It is also employed in power generation plants for components exposed to high temperatures and corrosive gases, such as boiler tubes and heat exchanger tubing.
Normal product forms: sheets, plates, bars, forgings, tubes, and wires.
Specifications/Standard: AMS 5766, AMS 5871, ASTM B163, ASTM B366, ASTM B407, ASTM B408, ASTM B409, ASTM B514, ASTM B515, ASTM B564, etc.
Nickel (Ni): 30-35%
Chromium (Cr): 19-23%
Iron (Fe): 39.5% min
Carbon (C): 0.10% max
Aluminum (Al): 0.15-0.60%
Titanium (Ti): 0.15-0.60%
Manganese (Mn): 1.5% max
Silicon (Si): 1.0% max
Sulfur (S): 0.015% max
Copper (Cu): 0.75% max
Physical Constants and Thermal Properties
Density: 7.94 gm/cm³
Melting range: 1350-1400 °C
Thermal conductivity: 12.5 W/mK
Mechanical Property:
Tensile strength (annealed): 600 MPa
Yield strength (annealed): 275 MPa
Elongation at Break: 45%
