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Chemical composition

Physical properties

Minimum mechanical properties of Hastelloy C-22 alloy at room temperature

Alloy properties

Hastelloy C22 alloy has good resistance to pitting corrosion, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidative aqueous media including wet chlorine, nitric acid or a mixture of oxidative acids containing chloride ions. At the same time, Hastelloy C22 alloy also has ideal resistance to reducing and oxidizing environments encountered in the process. Relying on this versatile performance, it can be used in some troublesome environments, or in a variety of production purpose factories. Hastelloy C22 alloy has exceptional resistance to a variety of chemical environments, including strong oxidizing substances such as ferric chloride, cupric chloride, chlorine, thermally polluted solutions (organic and inorganic), formic acid, acetic acid, acetic anhydride, seawater and salt solution, etc. Hastelloy C22 alloy has the ability to resist the formation of grain boundary precipitation in the welding heat affected zone, which makes it suitable for many chemical process applications in the welded state.

Advantages of Hastelloy C22

1. Excellent resistance to a wide range of corrosive environments, including oxidizing and reducing conditions.
2. Superior resistance to pitting, crevice corrosion, and stress corrosion cracking.
3. High resistance to chloride-induced corrosion and sulfuric acid.
4. Good weldability and fabrication characteristics for ease of manufacturing.
5. Versatile material suitable for various chemical processing applications.
6. High temperature stability, maintaining integrity at elevated temperatures.
7. Low risk of sensitization, ensuring long-term reliability in corrosive environments.
8. Wide availability and proven track record in critical industries.

Application field

Hastelloy C22 alloy is widely used in chemical and petrochemical fields, such as components and catalytic systems in contact with chloride-containing organics. This material is especially suitable for use in high temperature, inorganic and organic acids mixed with impurities (such as formic acid and acetic acid), and seawater corrosive environments.

Other application areas

1. Acetic acid/acetic anhydride
2. Pickling
3. Cellophane manufacturing
4. Chlorination system
5. Complex Mixed Acids
6. Rollers of electro-galvanizing tank
7. Expansion bellows
8. Flue gas cleaning system
9. Geothermal Wells
10. Hydrogen fluoride furnace cleaner
11. Incineration cleaner system
12. Nuclear fuel regeneration
13. Insecticide production
14. Phosphoric acid production
15. Pickling system
16. Plate heat exchanger
17. Selective Filtration System
18. Sulfur dioxide cooling tower
19. Sulfonation system
20. Tube heat exchanger
21. Surfacing valve