Incoloy 800HT UNS number

Incoloy 800HT is a high-carbon, titanium-aluminum stabilized upgrade of the Incoloy 800 series. Its core characteristic is the precise control of carbon, aluminum, and titanium content, providing optimal creep resistance, carburization resistance, and high-temperature oxidation resistance at temperatures up to approximately 815°C, while also possessing extremely high high-temperature strength and long-term stability. It is specifically designed for extreme environments requiring long-term exposure to high temperatures, high pressures, and thermal cycling, such as petrochemical cracking furnace tubes, industrial heaters, high-temperature heat exchangers, and nuclear power plant steam generators. It is particularly suitable for critical applications involving high-temperature stress rupture and creep, making it a top-tier alloy choice for high-temperature pressure-bearing components.

Generally, Inconel 800 alloy exhibits higher mechanical properties at room temperature and under short-term high-temperature exposure, while Inconel 800H and 800HT alloys have superior creep strength and rupture strength under prolonged high-temperature exposure.