Hastelloy C-22 (UNS N06022)

By virtue of Hastelloy C-22 (UNS N06022) contents of chromium, molybdenum, tungsten and controlled iron, this alloy exhibits excellent resistance to both oxidizing and reducing acid environments, as well as those containing mixed acids. It is particularly useful for resistance to pitting and crevice corrosion in acid-halide environments.

Equivalent Grades

Trademarks	GB	JIS	KS	ASTM	UNS	DIN	W.Nr	GOST	BS	NF
Hastelloy C-22	NS3308	–	–	Hastelloy C-22	N06022	NiCr21Mo14W	2.4602	–	–	–

Product Forms

Wire, Bar, Strip, Sheet, Plate, Tube, Pipe, Pipe Fittings, Forgings

Chemical Composition,%

C	P	S	Mn	Si	Cr	Ni	Mo	W	Co	V	Fe
≤0.015	≤0.040	≤0.030	≤0.50	≤0.08	20.0~25.0	Bal	12.5~14.5	2.5~3.5	≤2.50	≤0.35	2.0~6.0

Typical Physical & Mechanical Properties (Annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	Elongation,%
8.69	1325-1370	758	363	62

Specifications

Rod, Bar, Wire, Forgings	ASTM B462, ASME SB462, ASTM B564, ASME SB564, DIN 17752/17753/17754, ISO 9723/9724/9725, DIN 17752, ISO 9723
Plate, Sheet, Strip	ASTM B575, ASME SB575, ASTM B906, ASME SB906, DIN 17750, ISO 6208
Pipe, Tube	ASTM B622, ASME SB622, ASTM B619, ASME SB619, ASTM B626, ASME SB626, ASTM B751, ASME SB751, ASTM B775, ASME SB775, DIN 17751, ISO 6207
Welding Products	AWS A5.14 ERNiCrMo-10, ASME Ⅱ SFA-5.14 ERNiCrMo-10, ASME Ⅸ F-No.43
Others	ASTM B366, ASME SB366, DIN17744

Features

Excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chloride ions
Offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams
Exceptional resistance to a wide variety of chemical process environments, including strong oxidizers such as ferric and cupric chlorides, chlorine, hot contaminated solutions (organic and inorganic), formic and acetic acids, acetic anhydride, and seawater and brine solutions
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.

Applications

Chemical processing involving acetic acid, acetic anhydride and complex acid mixture
Pickling operations
Cellophane manufacture
Chlorination systems
Electro-galvanizing rolls, expansion bellows
Flue gas scrubber systems; geothermal wells
HF furnace scrubbers
Incineration scrubbers
Nuclear fuel reprocessing
Pesticide production
Phosphoric acid production
Heat exchangers
Selective leaching systems
Sulfur dioxide cooling towers
Sulphonation systemsand weld overlay