Hastelloy C-22 Wire Mesh Screen
UNS Number N06022 Other common names: Alloy C22
Hastelloy C22 Wire Mesh Screen 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 Wire Mesh Screen 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. This is beneficial in multi-
purpose plants where such "upset" conditions occur frequently.
This nickel alloy resists the formation of grain-boundary
precipitates in the weld heat-affected zone, thus making it
suitable for most chemical process applications in the as-welded
condition.
Alloy C-22 Wire Mesh Screen should not be used in service
temperatures above 1250° F (676.7℃) due to the formation of
detrimental phases which form above this temperature.
Characteristics of Hastelloy C22 Wire Mesh Screen
l Resistant to pitting, crevice corrosion and stress corrosion
cracking
l Outstanding resistance to both reducing and oxidizing media
l Excellent resistance to oxidizing aqueous media
l Exceptional resistance to a wide variety of chemical process
environments including strong oxidizers such as ferric acids,
acetic anhydride, and seawater and brine solutions
l Resists the formation of grain-boundary precipitates in the weld
heat-affected zone
l Excellent weldability
Hastelloy C22 Wire Mesh Screen 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 | | | | |
In what applications is Hastelloy C22 used?
1.Pharmaceutical industries use alloy C-22 fittings and tubing to
avoid contamination caused by corrosion related failures
2.Cellophane manufacturing
3.Chlorination systems
4.Pesticide production
5.Incineration scrubber systems
6.Chemical process industry in equipment like flue gas scrubbers,
chlorination systems, sulfur dioxide scrubbers, pulp and paper
bleach plants, pickling systems, and nuclear fuel reprocessing
7.Waste water processing