Hastelloy Alloy C-22

Product Detail

Hastelloy C-22 (UNS N06022/W.Nr.2.4602)

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