HASTELLOY C-22 annealed Durability and Corrosion Resistance (Nickel-Mo-Cr alloy)

Designation: HASTELLOY C-22, annealed (Nickel-Mo-Cr alloy)
ConditionAnnealed
UNS numberN06022
US nameASTM Grade N06022
EN nameNiCr21Mo14W
EN number2.4602
ISO nameISO 9723, 9724, 6207

Durability: HASTELLOY C-22 annealed

Water (fresh)Excellent
Water (salt)Excellent
Weak acidsExcellent
Strong acidsExcellent
Weak alkalisExcellent
Strong alkalisExcellent
Organic solventsExcellent
Oxidation at 500CExcellent
UV radiation (sunlight)Excellent
Galling resistance (adhesive wear)
Notes: Bronze or zinc alloy dies should be used to minimize galling.
Acceptable
FlammabilityNon-flammable

Corrosion resistance: HASTELLOY C-22 annealed

Stress corrosion cracking
Note: Rated in chloride;
Other susceptible environments: Hydroxide
Not susceptible
Intergranular (weld line) corrosionExcellent
Inorganic acidsExcellent
Organic acidsGood
AlkalisExcellent
Humidity / waterExcellent
Sea waterExcellent
Sour oil and gasExcellent

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