N08811/Incoloy800HT/NS112B High-Temperature Alloy Bar for Thermal Processing Equipment
The N08811 (Incoloy 800HT/NS112B) high-temperature alloy bar is a nickel-iron-chromium alloy designed for excellent strength and oxidation resistance in high-temperature environments. It has enhanced creep and rupture strength due to controlled carbon, aluminum, and titanium content. The alloy resists oxidation, carburization, and sulfidation, making it ideal for applications in heat exchangers, furnace components, petrochemical processing, and power generation. It maintains structural stability up to 1100°C (2012°F), ensuring reliability in extreme conditions. With good weldability and corrosion resistance, N08811 is widely used in industries requiring superior thermal stability and mechanical strength. Its high nickel content also improves resistance to chloride stress corrosion cracking, enhancing durability in harsh environments.
Chemical Composition Wt.% | % | Fe | C | Si | Mn | S | Cr | Ni | Cu | Ti | Al |
Min | 39.5 | 0.06 | 19 | 30 | 0.15 | 0.15 | |||||
Max | 0.1 | 1 | 1.5 | 0.015 | 23 | 35 | 0.75 | 0.6 | 0.6 |
Physical Constants | Density(g/cm³) | 7.94 | |||||
Melting Range(℃) | 1357-1385°C |
AlloyState | Recovery Strength Reduction (RP0.2) N/mm2 | Tensile Strength Rm N/mm2) | Elongation A5% |
Solid Solution State | 275 | 550 | 30 |
Trade Code
GB | Commercial Code | UNS |
NS112B | Incoloy800HT | UNS N08811 |
The N08811 (Incoloy 800HT/NS112B) high-temperature alloy bar is a nickel-iron-chromium alloy designed for high-temperature and corrosion-resistant applications.
Below are its key features:
Excellent mechanical properties at elevated temperatures (up to 1100°C / 2012°F).
Enhanced creep and rupture strength due to controlled aluminum and titanium content.
Resistant to oxidation and carburization in high-temperature environments.
Good resistance to sulfidation and chloride stress corrosion cracking.
Suitable for acidic and high-temperature steam environments.
Maintains microstructural stability under prolonged exposure to high temperatures.
Low tendency to form embrittling phases, ensuring long service life.
Can be hot or cold worked and readily welded using standard techniques.
Suitable for forming, machining, and welding without loss of mechanical properties.
The N08811 (Incoloy 800HT / NS112B) high-temperature alloy bar is a nickel-iron-chromium alloy known for its excellent strength, oxidation resistance, and carburization resistance at elevated temperatures. It is commonly used in industries requiring high heat and corrosion resistance.
Furnace components
Heat exchangers
Radiant tubes
Muffles and retorts
Burner nozzles
Ethylene pyrolysis furnaces
Reforming units
Hydrocarbon cracking systems
Catalyst support grids
Heat exchanger tubing
Superheater and reheater tubes
Steam generator components
High-temperature piping in fossil fuel and nuclear plants
Jet engine exhaust systems
Afterburner components
High-performance automotive exhaust manifolds
Gas turbines and combustion chambers
Cryogenic and high-temperature gas containment
This alloy is particularly useful in applications where thermal stability, creep resistance, and resistance to oxidation and carburization are critical.