Hastelloy C-22, also known as Alloy C-22, with the UNS designation N06022 and W. Nr. 2.4602, is a nickel-chromium-molybdenum-tungsten alloy known for its exceptional versatility and resistance to a wide range of corrosive environments. This alloy offers superior resistance to both oxidizing and reducing environments, making it suitable for use in various chemical processing applications. Hastelloy C-22 exhibits excellent resistance to pitting, crevice corrosion, and stress corrosion cracking, and it is also highly resistant to a wide range of chemicals, including chlorides, sulfuric acid, and other aggressive media. This makes it a preferred material for applications involving harsh chemical environments, such as in chemical processing, pollution control, and waste treatment facilities.
Whatsapp:
+8615900526263E-mail:
sales@cocessalloys.comChemical Composition
|
Nickel (Ni) |
Balance |
|
Chromium (Cr) |
20.0-22.5% |
|
Molybdenum (Mo) |
12.5-14.5% |
|
Iron (Fe) |
2.0-6.0% |
|
Tungsten (W) |
2.5-3.5% |
|
Cobalt (Co) |
2.5% max. |
|
Vanadium (V) |
0.35% max. |
|
Carbon (C) |
0.015% max. |
|
Phosphorus (P) |
0.8% max. |
|
Carbon (C) |
0.03% max. |
|
Manganese (Mn) |
0.50% max. |
|
Sulfur (S) |
0.02% max. |
|
Silicon (Si) |
0.08% max. |
|
Phosphorus (P) |
0.02% max. |
Physical Properties
|
Density |
g/cm³ |
8.61 |
|
lb/in |
0.311 |
|
|
Melting Range |
°C |
1351-1387 |
|
|
°F |
2464-2529 |
|
Specific Heat |
J/kg °C |
381 |
|
|
Btu/lb °F |
0.091 |
|
Permeability |
at 200 oersted (15.9 kA/m) |
0≤1.001 |
|
Electrical Resistivity |
ohm•circ mil/ft |
730.7 |
|
microhm•m |
1.215 |
|
|
Young’s Modulus(Dynamic) |
103ksi |
30.3 |
|
GPa |
209 |
|
|
Coefficient of Expansion |
70-200°F,106 in/in•°F |
6.90 |
|
21-193°C, μm/m•°C |
12.42 |
Mechanical Properties
|
Temperature |
Yield strength |
Yield strength |
Tensile strength |
Elongation |
||||
|
Rp 0.2 |
Rp 1.0 |
Rm |
A |
|||||
|
°C |
°F |
MPa |
ksi |
MPa |
ksi |
MPa |
ksi |
% |
|
20 |
68 |
310 |
45 |
335 |
48.6 |
690-950 |
100-138 |
45 |
Hastelloy C-22 is utilized in a wide range of applications across various industries due to its exceptional corrosion resistance and versatility. Some typical applications include:
1. Chemical processing: It is used in the manufacturing of reactors, heat exchangers, and other equipment for chemical processing due to its resistance to a wide range of corrosive chemicals, including chlorides, sulfuric acid, acetic acid, and other aggressive media.
2. Pollution control: Hastelloy C-22 finds applications in pollution control equipment, such as scrubbers, stack liners, and flue gas desulfurization systems, where resistance to corrosive gases and high temperatures is essential.
3. Waste treatment: It is employed in waste treatment facilities for handling corrosive chemicals, acidic solutions, and other aggressive media, where its corrosion resistance is crucial.
4. Pharmaceutical industry: Hastelloy C-22 is used in the production of pharmaceutical equipment and components that require resistance to corrosive chemicals and sanitizing agents.
5. Pulp and paper production: It is utilized in the manufacturing of bleach plants, digesters, and other equipment in the pulp and paper industry due to its resistance to corrosive chemicals and high-temperature performance.
6. Aerospace and marine applications: Hastelloy C-22 is employed in components exposed to corrosive environments in aerospace and marine applications, such as in aircraft ducting systems, seawater cooling systems, and marine exhaust systems.
Specifications for Hastelloy C-22 include the following:
|
Bar, Rod and Wire |
Seamless Pipe and Tube |
Welded Pipe and Tube |
Plate, Sheet, and Strip |
Forgings |
Fittings |
|
ASTM B 574/ASME SB 574 |
ASTM B 622 / ASME SB 622 |
ASTM B 626 /ASME SB 626, ASTM B 619 / ASME SB 619 |
ASTM B 575/ASME SB 575 |
ASTM B 564 /ASME SB 564, B472/SB472, B462/SB462 |
ASTM B 366/ASME SB 366 |
Standard product forms of Hastelloy C-22 are pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire. The products are available in a wide variety of sizes. Please contact us at sales@cocessalloys.com for full information.
