Nickel Hastelloy Alloy C22 UNS N06022
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Hastelloy C22, also known as alloy C22, is a versatile austenitic nickel-chromium-molybdenum-tungsten alloy with enhanced resistance to pitting, crevice corrosion and stress corrosion cracking. The high chromium content provides good resistance to oxidizing media while the molybdenum and tungsten content give good resistance to reducing media. This nickel steel alloy also has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chlorine ions. Other corrosives Hastelloy C-22 has resistance to are oxidizing acid chlorides, wet chlorine, formic and acetic acids, ferric and cupric chlorides, sea water, brine and many mixed or contaminated chemical solutions, both organic and inorganic.
Hastelloy C-22 Chemical Composition
| % | C≤ | Si≤ | Mn≤ | P≤ | S≤ | Cr≥ | Ni≥ | Mo≥ | Fe≤ | Co≤ | V≤ | W≤ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min. | - | - | - | - | - | 20 | balance | 12.5 | 2 | - | - | 2.5 |
| Max. | 0.015 | 0.08 | 0.5 | 0.025 | 0.01 | 22.5 | 14.5 | 6 | 2.5 | 0.35 | 3.5 |
Nickel Alloy C-22 Physical Properties
| Density | Melting range |
|---|---|
| 8.9 g/cm³ | 1325-1370°C |
Hastelloy Alloy C-22 Characteristic
- Nickel-Chromium-Molybdenum-Tungsten alloy with better overall corrosion resistance compared to any other Ni-Cr-Mo alloys,such as Hastelloy C-276,C-4 and alloy 625.
- Good resistance to pitting corrosion,crevice corrosion and stress corrosion cracking.
- Excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chlorine ions.
- Offering optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams.
- Can be used in some headache environment for the universal property,or used in a variety of factory production.
- Exceptional resistance to a wide variety of chemical process environments including strong oxidizers such as ferric acids,acetic anhydride,and seawater and brine solutions.
- Resists the formation of grain-boundary precipitates in the weld heat-affected zone,providing excellent as-welded conditions for process applications in chemical-based industries.
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