About Alloy
Hastelloy C22 is a versatile nickel-chromium-molybdenum-tungsten alloy known for its exceptional resistance to a wide range of corrosive environments, particularly in oxidizing and reducing conditions. This alloy offers high levels of resistance to both uniform and localized corrosion, making it suitable for use in aggressive chemical processing environments and applications involving exposure to harsh chemicals.
The key elements in Hastelloy C22, including nickel, chromium, molybdenum, and tungsten, contribute to its outstanding corrosion resistance properties. The high chromium content provides resistance to oxidizing media, while the molybdenum and tungsten enhance its resistance to reducing environments. Additionally, the alloy’s low carbon and silicon content minimizes carbide precipitation during welding, ensuring the material’s corrosion resistance in the welded condition.
Hastelloy C22 is widely used in applications involving wet chlorine gas, hypochlorite, and chlorine dioxide solutions, as well as in environments containing acids such as sulfuric, phosphoric, and acetic acids. It is also suitable for use in marine environments and in the presence of oxidizing salts.
The alloy’s excellent fabricability allows for easy forming, welding, and machining, further enhancing its versatility in various industrial applications. Its reliability and resistance to corrosion make it a preferred choice for critical components in aggressive chemical environments, including reactors, heat exchangers, and piping systems.
In summary, Hastelloy C22 is a high-performance alloy known for its exceptional resistance to a wide range of corrosive environments, making it well-suited for applications in chemical processing, pollution control, pulp and paper production, and other industries where exposure to aggressive chemical conditions is a concern.
Product Form
Bar: ASTM B462 / ASTM B564
Sheet/Strip: ASTM B575/ ASTM B906
Pipe:ASTM B622/ASTM B619/ ASTM B626
Chemical Composition
| Composition | Ni | Cr | Fe | Mo | W | Co | C | Mn | Si | S | V | P | Ti | |
| Content (%) | Min. | Bal. | 20 | 2 | 2.5 | |||||||||
| Max. | 22.5 | 6 | 3.5 | 2.5 | 0.015 | 0.5 | 0.08 | 0.02 | 0.35 | 0.02 | ||||
Property
| Tensile Strength (σb/MPa) | Yield Strength (σp0.2/MPa) | Elongation (σ5/%) |
| 758 | 363 | 62 |
Application
The exceptional corrosion resistance of C22 has promoted its use in many different markets wherever harsh environments are encountered, including the chemical process, pharmaceutical, food processing, oil & gas, power generation, and the paper industries. CRA offers specialty alloy C22 seamless pipe & tube for use in multiple industries and applications, including:
Chemical Processing
Food Processing
Pharmaceutical Industry
Oil & Gas
Power Generation
Pulp & Paper Industries
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