Acewell: What is the difference between nickel base alloy 800, 800H, 800HT?
The chemical composition of Incoloy 800/800H/800HT is very similar, so they all have good resistance to reduction, oxidation, nitriding medium corrosion and redox alternating medium corrosion resistance, and have high metallurgical properties in long-term high-temperature applications. stability. However, due to the different (Al+Ti) contents of the three materials, the environments in which the three materials are used are different, as shown in:
800 will exhibit various performances at subzero temperature, room temperature and high temperature of 600 °C.
Since the content of (Al+Ti) is not higher than 0.7%, 800H has good tensile strength above 600°C, and still has good toughness when working for a long time below 700°C.
800HT has excellent yield strength above 700°C. It is recommended to select materials according to the environment in which they are often used.
Application fields: heat exchangers, electric heating tubes, heat treatment components, acetate gypsum production and nuclear industry, etc.
Incoloy800, incoloy800H (UNS N08810), and incoloy800HT (UNS N08811) are all Nickel Alloys with different chemical compositions:
It should be possible to replace incoloy800 with incoloy800H (UNS N08810) alloy, and 800HT mainly has requirements for aluminum and titanium content. Specific physical properties, high temperature corrosion resistance.
