Hastelloy C22(USN N06022 W.Nr. 2.4602）

1.Hastelloy C22 Introduction

By virtue of its contents of chromium,  molybdenum, tungsten and controlled iron,  this alloy exhibits excellent resistance to both  oxidizing and reducing acid environments,  as well as those containing mixed acids. It is  particularly useful for resistance to pitting and  crevice corrosion in acid-halide environments.  Applications include the chemical processing,  pollution control, flue gas desulfurization,  waste incineration and pulp and paper  processing industries.

2.Hastelloy C22 STANDARD  PRODUCT FORMS

Sheet, strip, plate, round bar, flat bar, forging stock,  hexagon and wire.

3.Hastelloy C22 MAJOR  SPECIFICATIONS

USN N06022 ASTM B 366, B 462, B 564, B 574,  B 575, B 619, B 622, B 626,  B 751, B 775, B 829, B 906 ASME SB-366, SB-564, SB-574,  SB-575, SB-619, SB-622,   SB-626, SB-751, SB-775,   SB-829, SB-906 

ASME Code Cases 2226,  N-621 

Werkstoff Nr. 2.4602

ISO 6207, 6208, 9723,   9724 

DIN 17744, 17750-17754

4.Hastelloy C22 LIMITING CHEMICAL  COMPOSITION, % 

Ni.......Remainder 

Cr .....20.0 – 22.5 

Mo....12.5 – 14.5 

Fe..........2.0 – 6.0 

W...........2.5 – 3.5 

Co.......... 2.5 max. 

C....... 0.015 max. 

Mn.......0.50 max. 

V..........0.35 max. 

S..........0.02 max. 

Si.........0.08 max. 

P..........0.02 max

5.Hastelloy C22 PHYSICAL CONSTANTS  AND THERMAL  PROPERTIES

Density, Ib/in3  (g/cm3)...........................................0.311 (8.61) 

Melting Range, °F (°C).............2464 – 2529 (1351 – 1387)  

Specific Heat, Btu/lb•°F (J/kg•°C)......................0.091 (381) 

Curie Temperature, °F (°C)................................ <-320 (-196) 

Permeability at 200 Oersted (15.9 kA/m)................. <1.001 

Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C) 

70-200°F (21–93°C)..................6.90 (12.42) 

70-1000°F (21–538°C)............. 7.46 (13.43) 

70-1800°F (21–982°C)............. 7.84 (14.11) 

Thermal ConductivityA , Btu•in/ft2•h•°F (W/m•°C).......91 (13.2) 

Electrical ResistivityA , ohm•circ mil/ft (μΩ•m)...730.7 (1.215) 

Young’s ModulusA , 106  psi (GPa)............................ 30.3 (209) 

Shear’s ModulusA , 106  psi (GPa)........................... 11.0 (75.8) 

Poisson’s RatioA...................................................................... 0.30 

HardnessA , HRB ..........................................................................86 

Room temperature, as aged.

6.Hastelloy C22 TYPICAL MECHANICAL  PROPERTIES

7.Hastelloy C22 Metallographic structure

Hastelloy C22 has a face-centered cubic lattice structure.

8.Hastelloy C22 Corrosion resistance

Hastelloy C22 alloy is suitable for various chemical process industries containing oxidizing and reducing media. The higher molybdenum and chromium contents make the alloy resistant to chloride ions, and the tungsten element further improves its corrosion resistance. Hastelloy C22 is one of only a few materials resistant to corrosion in wet chlorine, hypochlorite, and chlorine dioxide solutions. copper chloride).

9.Hastelloy C22 Application area 

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

10.Hastelloy C22 Other application areas

1. Acetic acid/acetic anhydride

2. Pickling

3. Cellophane manufacturing

4. Chlorination system

5. Complex Mixed Acids

6. Rollers of electro-galvanizing tank

7. Expansion bellows

8. Flue gas cleaning system

9. Geothermal Wells

10. Hydrogen fluoride furnace cleaner

11. Incineration cleaner system

12. Nuclear fuel regeneration

13. Insecticide production

14. Phosphoric acid production

15. Pickling system

16. Plate heat exchanger

17. Selective Filtration System

18. Sulfur dioxide cooling tower

19. Sulfonation system

20. Tube heat exchanger

21. Surfacing valve