Hastelloy C-22HS (UNS N07022)

Hastelloy C-22HS (UNS N07022) alloy is the premier nickel-chromium-molybdenum, corrosion-resistant material for oil and gas industry use. Cold working of the alloy at levers between 30 and 65% result in high room temperature yield strengths. It exhibits exceptional resistance to sour gas environments.

Equivalent Grades

Trademark	GB	GOST	ASTM	UNS	DIN	W.Nr.	NF	BS	JIS	SS
Hastelloy C-22HS	–	–	Hastelloy C-22HS	N07022	–	–	–	–	–	–

Chemical Composition, %

Alloy

Hastelloy C-22HS

≤0.01

≤0.08

≤0.50

≤0.025

≤0.015

20.0-21.4

Bal

≤1.00

15.5-17.4

≤0.80

≤0.50

≤0.20

≤0.006

≤1.8

Typical Physical and Mechanical Properties (RT, Solution annealed)

Density, g/cm3	Melting Point, ℃	Tensile Strength, MPa	Yield Strength, MPa	ELongation, %	Hardness, HB
8.69	1325-1370	1250	800	35	–

Available Products and Specifications

Rod, Bar, Wire and Forgings	ASTM B637
Plate, Sheet and Strip	–
Pipe and Tube	ASTM B983
Welding Product	–
Others	–

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.