Material Introduction to Hastelloy Hastelloy C22

Hastelloy C22 alloy is a nickel-based high-temperature alloy composed of elements like nickel, molybdenum, cobalt, and tungsten, with a nickel content of about 60%. It is a versatile nickel-chromium-molybdenum-tungsten alloy that exhibits better overall corrosion resistance than other existing nickel-chromium-molybdenum alloys, including Hastelloy C-276, C4 alloy, and alloy 625. Hastelloy C22 offers excellent resistance to pitting, crevice corrosion, and stress corrosion cracking. It has superior resistance to oxidizing aqueous media, including wet chlorine, nitric acid, or mixed acids with chloride ions.

Moreover, Hastelloy C22 (N06022) alloy has an ideal ability to resist both reducing and oxidizing environments encountered during processes. Relying on this versatile performance, it can be used in challenging environments or in facilities with various production purposes. Hastelloy C22 (N06022) alloy exhibits exceptional resistance to a variety of chemical environments, including strong oxidizers such as ferric chloride, cupric chloride, chlorine, hot contaminated solutions (both organic and inorganic), formic acid, acetic acid, acetic anhydride, seawater, and brine solutions. Additionally, Hastelloy C22 (N06022) alloy has the capability to resist intergranular precipitation in the weld heat-affected zone, making it suitable for use in welded condition in many chemical processes.
Corresponding grades

chemical composition

Physical property : Density: 8.9 g/cm3, melting point: 1325-1370 ℃

Application Areas:

Hastelloy C22 alloy is widely used in the chemical and petrochemical sectors, such as in components and catalytic systems that come into contact with chlorinated organic substances. This material is particularly suitable for use in environments with high temperatures, impurities in inorganic acids and organic acids (such as formic acid and acetic acid), and seawater corrosion.

Other application areas include acetic acid/acetic anhydride, acid leaching, glassine paper manufacturing, chlorination systems, complex mixed acids, rollers in galvanizing baths, expansion bellows, flue gas cleaning systems, geothermal wells, hydrogen fluoride furnace cleaners, incineration cleaners, nuclear fuel reprocessing, pesticide production, phosphoric acid production, pickling systems, plate heat exchangers, selective filtering systems, sulfur dioxide cooling towers, sulfonation systems, tubular heat exchangers, and clad valves.