Hastelloy Alloy C-22

Chemical Composition Wt.%

alloy

%

Ni

Cr

Mo

Fe

W

Co

C

Mn

Si

V

P

S

C-22

min

bal

20.0

12.5

2

2.5

max

bal

22.5

14.5

6

3.5

2.5

0.015

0.5

0.08

0.35

0.02

0.02

Physical
Constants

density
g/cm³

8.9

Melting point
?

1325-1370

The minimum mechanical properties of the alloy at room temperature

Typical mechanical properties

test temperatureTest ?

tensile strength
Rm N/mm2

Yield Strength
RP0.2N/mm2

Elongation
A5 %

Solution treatment

Room temperature

690

283

40

Characters

Hastelloy C22 alloy is a versatile nickel-chromium-molybdenum tungsten alloy that offers better overall corrosion resistance than other existing nickel-chromium-molybdenum alloys, including Hastelloy C276, C4 alloys and 625 alloys. Hastelloy C22 alloy has good resistance to pitting, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidizing aqueous media, including mixed acids of wet chlorine, nitric acid or oxidizing acids containing chloride ions. Hastelloy C22 alloys are exceptionally resistant to a variety of chemical environments, including strong oxidizing substances such as ferric chloride, cupric chloride, chlorine, hot contaminated solutions (organic and inorganic), formic acid, acetic acid, acetic anhydride, seawater and Salt solution and so on. The Hastelloy C22 alloy has the ability to resist the formation of grain boundaries in the heat affected zone of the weld so that it can also be used in a wide variety of chemical processes in the welded state.

Perform standard

product

ASTM standard

product

ASTM standard

Bar

B574

Welded pipe

B619

Medium / thin board

B575

Pipe welding

B626

Seamless pipe

B622

Forgings

B564

Corrosion Resistance

Hastelloy C22 alloy for a variety of chemical processes containing oxidation and reduction media industry. Higher molybdenum, chromium content of the alloy can be resistant to chloride ion erosion, tungsten elements also further improve its corrosion resistance. Hastelloy C22 is one of the few materials that is resistant to moisture chlorine, hypochlorite and chlorine dioxide solutions that have significant corrosion resistance to high concentrations of chloride salts (such as ferric chloride and Copper chloride).

Applications

Hastelloy C-22 Other fields of application:
1. Acetic acid / acetic anhydride;
2. Acid leaching;
3. Cellophane manufacturing;
4. Chlorination system;
5. Complex mixed acid;
6. Galvanic tank rollers;
7. Expansion bellows;
8. Flue gas cleaner System
9. Geothermal well
10. Hydrogen fluoride furnace cleaner
11. Incinerator cleaner system
12. Nuclear fuel regeneration
13. Pesticide production
14. Phosphate production
15. Pickling system
16. Plate heat exchanger
17. Selective filtration system
18. Sulfur dioxide cooling tower
19. Sulfonation system
20. Tubular heat exchanger
21. Welding valve