What is C22?
Hastelloy C-22
UNS Number N06022
W.Nr. 2.4602
Other Common Names: Alloy C22
ASTM B574, B564, B575, B619, B626, B622
ASME SB574, SB564, SB575, SB619, SB626, SB622
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 contents provide 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 chloride ions. Other corrosives that Hastelloy C-22 resists include oxidizing acid chlorides, wet chlorine, formic and acetic acids, ferric and cupric chlorides, seawater, brines and many mixed or contaminated organic and inorganic chemical solutions.
In what forms is Hastelloy C22 available at Gnee Steel?
Plates
Bars
Pipes and tubes - welded and seamless
Fittings
Elbows, tees, stub ends, return tubes, caps, crossheads, reducers, unions, etc.
Welding wire (AWS Classification: ERNiCrMo-10 and ENiCrMo-10)
What are the characteristics of Hastelloy C22?
Resistant to pitting, crevice corrosion and stress corrosion cracking
Excellent resistance to both reducing and oxidizing media
Excellent resistance to oxidizing aqueous media
Excellent resistance to a wide range of chemical process environments, including strong oxidizers such as ferric acid, acetic anhydride, seawater and brine solutions
Resists the formation of grain boundary precipitates in the weld heat affected zone
Excellent weldability
