Nickel
Ni
Bal.
Chromium
Cr
20.0~22.5%
Molybdenum
Mo
12.5~14.5%
Iron
Fe
2.0~6.0%
Tungsten
W
2.5~3.5%
Cobalt
Co
≤2.5%
Manganese
Mn
≤0.5%
Sulphur
S
≤0.35%
Silicon
Si
≤0.08%
Phosphorus
P
≤0.02%
Vanadium
V
≤0.02%
Carbon
C
≤0.015%
Hastelloy C-22 alloy is a versatile nickel-chromium-molybdenum tungsten alloy, which has better overall performance than other existing nickel-chromium-molybdenum alloys, including Hastelloy C-276, C4 alloy and 625 alloy. Hastelloy C22 alloy has good resistance to pitting corrosion, crevice corrosion and stress corrosion cracking, and also has excellent resistance to oxidation of aqueous media, including wet chlorine, nitric acid or oxidizing mixed acids containing chloride ions. At the same time, Hastelloy C22 alloy also has the ideal ability to resist the reducing and oxidizing environment encountered in the process. Relying on this omnipotent performance, it can be used in some troublesome environments or in factories for multiple production purposes. Hastelloy C22 alloy has exceptional resistance to various chemical environments, including strong oxidizing substances, such as ferric chloride, copper chloride, chlorine, thermal pollution solutions (organic and inorganic), formic acid, acetic acid, acetic anhydride, sea water and Salt solution, etc. Therefore, Hastelloy C22 alloy has a wide range of applications in the chemical and petrochemical fields, and is especially suitable for use in high temperature, mixed with impurities of inorganic and organic acids (such as formic acid and acetic acid), and seawater corrosive environments.
Hastelloy C-22 welding performanceHastelloy C22 alloy has the ability to resist the formation of grain boundary precipitation in the welding heat-affected zone, so that it can adapt to many chemical process applications in the welding state.
Hastelloy C22 corrosion resistanceHastelloy C22
alloy is suitable for various chemical process industries containing oxidizing and reducing media. The high content of molybdenum and chromium can resist the corrosion of chloride ions, and the tungsten element further improves its corrosion resistance. Hastelloy C22 is one of the only materials that can withstand the corrosion of humid chlorine, hypochlorite and chlorine dioxide solutions. The alloy has significant corrosion resistance to high-concentration chloride solutions (such as ferric chloride and Copper chloride).
Physical properties
| Density |
8.94g/cm3 |
| Melting Point |
1325-1370℃ |
The minimum value of the mechanical properties of the alloy at room temperature
| Alloy grade |
Tensile strength |
Yield Strength |
Elongation |
| RM N/MM2 |
RP0.2N/MM2 |
A5% |
| Hastelloy C22 |
690 |
283 |
40 |
