HASTELLOY C-22
 
 
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. This nickel alloy also offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams.
 
  • cellophone manufacturing,
  • fans and blowers,
  • galvanizing line equipment,
  • gas scrubber systems,
  • geothermal wells,
  • nuclear fuel reprocessing
  • pesticide production
  • phosphoric acid applications,
  • pickling system components,
  • plate heat exchangers,
  • selective leaching systems,
  • sulfur oxide cooling towers,
  • tubular heat exchangers.
 
 

(UNS N06022) Chemical Composition, %

 

C

Cr

Co

Fe

Mn

Mo

Ni

P

.010 max

20-22.5

2.5 max

2.0-6.0

.50 max

12.5-14.5

Balance

.02 max

Si

S

W

V

 

.08 max

.02 max

2.5-3.5

.35 max