Forms
Alloy 22 Applications
Alloy 22 has a broad field of application in the chemicals and petrochemicals industry and is used for components
in organic processes that contain chloride and for catalytic systems. The material is especially effective in hot, contaminated mineral acids, solutions, organic acids (such as formic acid and acetic acid) or sea water.
Other fields of application are:
- Acetic acid production.
- Pharmaceuticals industry.
- Fine chemicals.
Alloy 22 is a nickel-chromium-molybdenum alloy with tungsten and extremely low carbon and silicon content.
Alloy 22 is characterized by:
- Extraordinary resistance across a wide range of corrosive media under oxidizing and reducing conditions.
- Particularly high resistance to crevice, pitting, and stress corrosion.
Alloy 22 Plate Standards
| Sheet, Plate | B 575 | SB 575 | 17750 17744 |
6208 9722 |
| Strip | B 575 | SB 575 | 17744 | 18274 6280 |
| Rod, Bar | B 574 B 564 |
SB 574 SB 564 |
17744 17752 |
- |
| Wire | - | - | 17744 | - |
Alloy 22 Designations
| EN | 2.4602 – NiCr21Mo14W |
| ISO | NiCr21Mo14W3 |
| UNS | N06022 |
Alloy 22 Chemical Composition
| Min | 20.0 | 12.5 | Balance | 2.0 | 2.5 | - | - | - | - | - | - | |
| Max | 22.5 | 14.5 | Balance | 6.0 | 3.5 | 2.5 | 0.50 | 0.35 | 0.08 | 0.025 | 0.015 | 0.02 |
Alloy 22 Physical Properties
| 8.7 g/m3 at 20 ℃ (543 lb/ft3) at 68 ℉ | 1,360 - 1,400 ℃(2,470 - 2,550 ℉) | 240 |
| Specific Heat | 406/0.097 | 444/0.106 | 495/0.118 | 533/0.127 | -/- | -/- |
| Thermal Conductivity | 9.4/65.2 | 13.4/92.9 | 19.5/135 | 23.2/161 | -/- | -/- |
| Electrical Resistivity | 121 | 123 | 127 | 129 | - | - |
| Modulus Of Elasticity | 206/29.9 | 197/28.6 | 178/25.8 | 167/24.2 | 150/21.8 | 143/20.7 |
| Co-efficient of Thermal Expansion | -/- | 12.4/6.89 | 13.7/7.61 | 14.9/8.28 | 15.8/8.78 | 16.2/9.0 |
Alloy 22 Mechanical Properties
| Yield Strength MPa/ksi |
310/45 | 270/39.2 | 195/28.3 | 175/25.4 |
| Tensile Strength MPa/ksi |
690-950/100-138 | -/- | -/- | -/- |
| Elongation % |
45 | - | - | - |
Welding Alloy 22
When welding nickel alloys and special stainless steels, the following information should be taken into account:
The generally applicable safety recommendations, especially for avoiding dust and smoke exposure must be observed.
A separately located workplace, which is specifically separated from areas in which C-steel is being processed, must be
provided. Maximum cleanliness is required, and drafts should be avoided during gas-shielded welding.
Welding Filler
| The following welding filler is recommended: |
|---|
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