Oxidizing & Non-Oxidizing Media
Used in selected chemical environments where a combination of corrosion-resistance characteristics is required.
HASTELLOY® · Product Details
HASTELLOY® C-22
Nickel–Chromium–Molybdenum Alloy · Oxidizing and Non-Oxidizing Media
HASTELLOY® C-22 is a nickel-chromium-molybdenum alloy known for resistance to both oxidizing and non-oxidizing chemicals. Its high chromium content supports resistance in oxidizing media, while the alloy is also noted for protection against pitting, crevice attack and stress-corrosion cracking in demanding service environments.
Ni–Cr–Mo–WAlloy system
8.69 g/cm³Reference density
1357–1399 °CReference melting range
Key Performance Characteristics
UNS N06022 / W. Nr. 2.4602
Pitting & Crevice Resistance
Particularly noted for resistance to chloride-induced localized corrosion.
Stress-Corrosion Resistance
Provides resistance to stress-corrosion cracking in selected corrosive environments.
Fabrication & Joining
The alloy is ductile and can be fabricated and welded using suitable procedures.
Typical Application Areas
Chemical Process Equipment
Selected reactors, heat exchangers and process columns.
Pharmaceutical Processing
Selected vessels and process components requiring corrosion-resistant materials.
Flue-Gas Treatment
Selected pollution-control and flue-gas desulfurization equipment.
Corrosive Solution Handling
Selected piping, vessels and components subject to detailed process review.
Chemical Composition
Nominal composition, wt.%
| Element | Nominal composition |
|---|---|
| Nickel | Balance (approx. 56%) |
| Chromium | 22% |
| Molybdenum | 13% |
| Iron | 3% |
| Tungsten | 3% |
| Cobalt | 2.5 max. |
| Manganese | 0.5 max. |
| Silicon | 0.08 max. |
| Carbon | 0.01 max. |
| Vanadium | 0.35 max. |
| Copper | 0.5 max. |
Physical Properties
Published reference values
| Property | Reference value |
|---|---|
| Density | 8.69 g/cm³ |
| Melting range | 1357–1399 °C |
| Specific heat at 50 °C | 414 J/(kg·°C) |
| Thermal conductivity at 50 °C | 10.1 W/(m·°C) |
Mechanical Properties
Reference data by form and condition
| Product form / condition | Tensile strength | 0.2% yield strength | Elongation |
|---|---|---|---|
| Sheet, 0.7–3.2 mm, room temperature | 800 MPa | 407 MPa | 57% |
| Plate, 6.4–19.1 mm, room temperature | 786 MPa | 372 MPa | 62% |
| Bar, 12.7–50.8 mm, room temperature | 765 MPa | 359 MPa | 70% |
Representative published room-temperature values for the forms and size ranges shown; these are not universal minimums for every product specification.
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Technical reference: Haynes International — HASTELLOY® C-22 technical data