Incoloy refers to a class of nickel-based alloys with good corrosion resistance and high temperature resistance. These alloys are widely used in high temperature and highly corrosive environments such as chemistry, energy, and aerospace. Common Incoloy alloys include Incoloy 800, Incoloy 825, and Incoloy 909.
How to distinguish these different Incoloy alloys?
According to the main components of the alloy
Incoloy alloys are mainly composed of elements such as nickel (Ni), iron (Fe), chromium (Cr), molybdenum (Mo), and copper (Cu), and the composition ratios of different alloys are different. For example:
Incoloy 800: Mainly composed of nickel, iron and chromium, it has good high temperature resistance and corrosion resistance. It is often used to manufacture furnace tubes, heat exchangers, etc.
Incoloy 825: In addition to nickel, iron and chromium, it also contains a higher proportion of molybdenum (Mo) and copper (Cu), which makes it exhibit excellent corrosion resistance in acidic environments.
Incoloy 909: This alloy contains more aluminum and titanium, which can provide higher oxidation resistance and strength.
Differentiate according to the application environment of the alloy
Different types of Incoloy alloys are suitable for different working environments. For example:
Incoloy 800: Mainly used for high temperature and oxidation resistant applications, such as petroleum refining, heat exchangers, etc.
Incoloy 825: Suitable for chemical processing industry, acidic gas and acidic liquid treatment, especially in corrosive media such as chlorides and sulfuric acid.
Incoloy 909: Widely used in structural parts in high temperature environments, especially in situations where high pressure and strong corrosive environments need to be withstood.
Differentiate according to the corrosion resistance of the alloy
Incoloy alloys also differ in corrosion resistance:
Incoloy 800: Strong resistance to high temperature oxidation, but average performance in some strong corrosive media.
Incoloy 825: Very excellent corrosion resistance in acidic and chloride environments, especially suitable for use in the chemical industry.
Incoloy 909: It has good corrosion resistance under high temperature and high pressure, but it is mainly used in special high-temperature alloys, and its corrosion resistance is inferior to 825 alloy.
Differentiation by physical properties
Different Incoloy alloys differ in mechanical properties, melting point, thermal conductivity, etc. For example:
Incoloy 800: It has good strength and plasticity, high melting point, and is suitable for high temperature environments.
Incoloy 825: It has excellent corrosion resistance and strong oxidation resistance, and is suitable for acidic environments.
Incoloy 909: It has extremely high creep resistance and is suitable for long-term application under high pressure and high temperature.
Differentiation by alloy standard number
Incoloy alloys have specific numbers in international standards. For example:
Incoloy 800: UNS N08800.
Incoloy 825: UNS N08825.
Incoloy 909: UNS N09909.
