Incoloy 800HT Pipes (UNS N08811) are a controlled composition derivative of INCOLOY alloy 800H and are used for the same creep-resistant applications. However, the combined effects of mechanical and thermal processing of the alloy allow for higher design stresses to be incorporated than are allowed for the conventional alloy. These nickel-iron-chromium alloy Incoloy 800 ERW Pipes have exceptional resistance to oxidation and carburization when exposed to high temperatures. They also have good strength.
Precipitation of the sigma phase produced pipes that were extremely resistant to both chloride stress-corrosion cracking and embrittlement. Incoloy 800HT Pipes have superior creep and stress rupture qualities in the solution annealed state.
The paper pulp industry and nuclear power plants both employ “Incoloy 800HT Pipes.” These tubes are frequently used in extruded tubing as well as steam methane reforming furnaces. Both welded and seamless forms are produced for them. Even in an acidic environment, these pipes are very resistant to corrosion. It is utilised by numerous businesses around the world for a variety of applications, particularly those that deal with temperatures about 600 degrees Celsius.
The majority of applications for Incoloy 800 can tolerate temperatures of 1100° F. In situations where resistance to creep and rupture is required, alloys 800H and 800HT are typically employed. The nickel steel alloy exhibits exceptional resistance to carburization, oxidation, and nitriding atmospheres due to its chemical balance. The excellent cold forming properties of nickel-chromium alloys are demonstrated by 800HT pipe, which is also weldable using standard methods.
Characteristics of Incoloy 800HT Pipes
greater creep and rupture resistance at temperatures greater than 1100°F (600°C)
Very good oxidation, sulfidation, and carburization resistance
resistant to corrosion at high temperatures and extended exposure
easily manufactured using standard methods
aqueous corrosion resistance at moderate temperatures
