Hastelloy C-22、UNS N06022

Hastelloy C-22 (UNS N06022 / W N 2.4602) alloy has the following characteristics:

Hastelloy C22 alloy is a versatile nickel-chromium-molybdenum-tungsten alloy that has better overall corrosion resistance than other existing nickel-chromium-molybdenum alloys, including Hastelloy C276, C4 alloy, and 625 alloy. Hastelloy C22 alloy has good resistance to pitting, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidizing aqueous media, including wet chlorine, nitric acid or mixed acids containing oxidizing acids containing chloride ions. At the same time, Hastelloy C22 alloy also has the ideal resistance to the reducing and oxidizing environment encountered during the process. Relying on this versatile performance, it can be used in some troublesome environments or in a variety of production purpose factories. Hastelloy C22 alloy has exceptional resistance to various chemical environments, including strongly oxidizing substances such as ferric chloride, copper chloride, chlorine, heat-polluting solutions (organic and inorganic), formic acid, acetic acid, acetic anhydride, seawater and Salt solution, etc. Hastelloy C22 alloy has the ability to resist the formation of grain boundary precipitates in the heat-affected zone of welding, so that it can also be adapted to many chemical process applications in the welded state.

Hastelloy C-22 chemical composition:

%	Ni	Cr	Mo	W	C	Mn	Si	P	S
Min.	margin	20.0	12.5	2.5
Max.		22.0	14.5	3.5	0.015	0.50	0.08	0.02	0.02

Hastelloy C-22 physical properties:

Density	8.9 g / cm3
Melting point	1325-1370 ℃

Hastelloy C-22 The minimum mechanical properties of the alloy at room temperature:

tensile strength Rm N/mm2	yield strength RP0.2N/mm2	Elongation A5 %
690	283	40

Metallurgical structure of Hastelloy C-22:

Hastelloy C22 has a face-centered cubic lattice structure.

Hastelloy C-22 corrosion resistance:

Hastelloy C22 alloy is suitable for a variety of chemical process industries containing oxidizing and reducing media. The higher molybdenum and chromium content makes the alloy resistant to chloride ion attack, and the tungsten element further improves its corrosion resistance. Hastelloy C22 is one of the only materials that can resist the corrosion of damp chlorine, hypochlorite and chlorine dioxide solutions. The alloy has significant corrosion resistance to high-concentration chloride solutions (such as ferric chloride and Copper chloride).

Hastelloy C-22 application areas are:

Hastelloy C22 alloy has been widely used in chemical and petrochemical fields, such as in components and catalytic systems exposed to chloride-containing organics. This material is particularly suitable for use in high temperature, mixed inorganic and organic acids (such as formic acid and acetic acid), and seawater corrosive environments.

Hastelloy C-22 Other application areas:

1.Acetic acid / acetic anhydride

2. Pickling

3. Cellophane manufacturing

4.Chlorination system

5. Complex mixed acids

6.Electro-galvanized roller

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. Insecticide production

14. Phosphoric acid production

15. Pickling system

16. Plate heat exchanger

17.Selective filtering system

18.Sulfur dioxide cooling tower

19.sulfonation system

20.Tube heat exchanger

21. Surfacing Valve

Special alloy materials commonly used in the chemical industry:

Stainless steel: 253MA, 316L, 353MA, 654SMO, 904L, etc.

Nickel-based alloys: Alloy 31, Alloy 59, Hastelloy B, Hastelloy C, Hastelloy C-276, etc.

Corrosion-resistant alloys: NS112, NS322, NS333, NS335