Alloy C22 / 2.4602
Alloy C22 is very resistant to many corrosive media under oxidizing and reducing conditions. It is, for example, resistant to:
Splitting, cracking and pitting corrosion
Moist chlorine gas
Chloride and hypochlorite ion attacks
chlorine dioxide
Solutions of oxidizing salts
Material Data Sheet
| Material Designation | 2.4602 |
|---|---|
| Alloy | Alloy C22 |
| EN Material Symbol | NiCr21Mo14W |
| UNS | N06022 |
| VdTÜV Datasheet | 479 |
Main fields of application of alloy C22
Alloy 22 is used in the petrochemical and chemical industry. 2.4602 is a common material when it comes to contact with hot, contaminated mineral acids, solutions or seawater. It is used also in bleaching containers (such as in the pulp and paper industry) and acetic acid production in a reactor. Alloy 22 also occurs in components with sour gas applications.
Chemical composition of alloy C22
| C | Si | Mn | P | S | Cr | Mo |
|---|---|---|---|---|---|---|
| % | ≤ % | ≤ % | ≤ % | ≤ % | % | % |
| 0-0.01 | 0-0.08 | 0-0.5 | 0-0.015 | 0-0.005 | 20.0-22.5 | 12.5-14.5 |
| Ni | Co | Fe | W | V |
|---|---|---|---|---|
| % | ≤ % | % | % | % |
| 50.0-63.0 | 0-2.5 | 2.0-6.0 | v | 0-0.35 |
Characteristics of alloy C22
| Temperature Range | Material for wet corrosion |
|---|---|
| Density | 8.61 g/cm³ |
| Melting Range | 1355 - 1400°C |
| ISO-V notch impact toughnessISO-V notch impact toughness | ≥ 150 J/cm² at room temperature |
| ≥ 120 J/cm² at -196°C |
Filler metal (for welding with alloy C22)
Welding Rod (WIG) 2.4635