What is C22 chemical?
C22 alloy is a nickel-chromium-molybdenum solid solution strengthened high temperature alloy with a nominal chemical composition of 56% nickel, 22% chromium and 13% molybdenum, with additions of iron, tungsten and cobalt. Its common trade name is Hastelloy C22, and its common name is UNS N06022. C22 alloy has excellent corrosion and oxidation resistance, excellent mechanical properties over a wide temperature range, and good processing properties.
Features
Corrosion resistance
C22 alloy is one of the most corrosion-resistant alloys currently available, and its performance is even better than that of C276 and 625 alloys. It can withstand almost all reducing and oxidizing environments, including strong oxidants, seawater and organic acids. In addition, C22 alloy also has excellent resistance to localized corrosion caused by chlorides, including pitting, crevice corrosion and stress corrosion cracking.
Oxidation resistance
C22 has excellent resistance to oxidation, carburization and sulfidation at high temperatures. However, C22 should not be used at temperatures exceeding 1250°F (700°C) due to the possible formation of embrittled phases.
Mechanical Properties
C22 is usually supplied in the annealed condition with a minimum yield strength of 45 ksi. However, C22 can be cold worked to higher strengths.
Heat Treatment
C22 is usually annealed at 2050°F (1121°C) and then rapidly cooled.
Processing Properties
C22 can be hot worked or cold worked. However, C22 hardens rapidly. Therefore, cold working must usually be done in stages with annealing in between. Parts should be annealed after cold working.
Applications
The excellent corrosion resistance of C22 alloy makes it widely used in a variety of harsh environment fields, including the chemical, pharmaceutical, food processing, oil and gas, power generation, and papermaking industries. CRA offers specialty alloy C22 seamless tubing for a variety of industries and applications including:
Chemical,
Food processing,
Pharmaceutical,
Oil and gas,
Power generation,
Pulp and paper
