Hastelloy C22
Hastelloy C22
Hastelloy C22
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  • Products Description
  • Applications

Form

ASTM

Rod

B 574

Plate, sheet and strip

B 575

Seamless pipe and tube

B 622

Welded pipe

B 619, B 775

Welded tube

B 626, B 751

Welding fitting

B 366

Forged or rolled pipe flange and forged fitting

B 462

Billet and bar for reforging

B 472

Forging

B 564

Chemical Composition

%

Ni

Cr

Mo

Fe

W

Co

C

Mn

Si

P

S

V

min

balance

20.0

12.5

2.0

2.5








max

22.5

14.5

6.0

3.5

2.5

0.015

0.50

0.08

0.020

0.020

0.35

Physical Properties

Density

8.69 g/cm3

Melting range

1325-1370℃

Features: Hastelloy C-22 is a versatile Ni-Cr-Mo-W alloy with better comprehensive corrosion resistance performance than other Ni-Cr-Mo alloys, including Hastelloy C-276, Hastelloy C-4 and Inconel 625. Hastelloy C-22 has outstanding resistance to pitting, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chloride ions. It also offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams. So it can be used where “upset” conditions are likely to occur or in multi-purpose plants. Hastelloy C-22 has 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. It 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.

Note: Hastelloy and C-22 are registered trademarks of Haynes International, Inc. Inconel is a registered trademark of the Special Metals Corporation group of companies.
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