Hastelloy C-22 is a versatile Ni-Cr-Mo-W alloy with better comprehensive corrosion resistance performance than other Ni-Cr-Mo alloys, including Hastelloy C-276, Hastelloy C-4 and Inconel 625. Hastelloy C-22 has outstanding resistance to pitting, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizing acids with chloride ions. It also offers optimum resistance to environments where reducing and oxidizing conditions are encountered in process streams. So it can be used where “upset” conditions are likely to occur or in multi-purpose plants. Hastelloy C-22 has exceptional resistance to a wide variety of chemical process environments, including strong oxidizers such as ferric and cupric chlorides, chlorine, hot contaminated solutions (organic and inorganic), formic and acetic acids, acetic anhydride, and seawater and brine solutions. It resists the formation of grain boundary precipitates in the weld heat-affected zone, thus making it suitable for most chemical process applications in the as-welded condition.
Chinese designation: 哈氏合金 C-22
| Element | Min % | Max % |
|---|---|---|
| Cr | 20 | 22.5 |
| Mo | 12.5 | 14.5 |
| Fe | 2 | 6 |
| W | 2.5 | 3.5 |
| Co | — | 2.5 |
| Mn | — | 0.5 |
| V | — | 0.35 |
| Si | — | 0.08 |
| P | — | 0.02 |
| S | — | 0.02 |
| C | — | 0.015 |
| Ni | balance | — |
Chemical composition per the grade specification. Values are nominal; the certified analysis is issued with every order on EN 10204 3.1 documentation.
| Product form | ASTM / EN specification |
|---|---|
| Rod | B 574 |
| Plate, sheet and strip | B 575 |
| Seamless pipe and tube | B 622 |
| Welded pipe | B 619, B 775 |
| Welded tube | B 626, B 751 |
| Welding fitting | B 366 |
| Forged or rolled pipe flange and forged fitting | B 462 |
| Billet and bar for reforging | B 472 |
| Forging | B 564 |
Hastelloy C-22 (UNS N06022, DIN W. Nr. 2.4602) is a nickel-based alloys grade. Hastelloy C-22 is a versatile Ni-Cr-Mo-W alloy with better comprehensive corrosion resistance performance than other Ni-Cr-Mo alloys, including Hastelloy C-276, Hastelloy C-4 and Inconel 625. Hastelloy C-22 has outstanding resistance to pitting, crevice corrosion and stress corrosion cracking. It has excellent resistance to oxidizing aqueous media including wet chlorine and mixtures containing nitric acid or oxidizin
ROBAN supplies Hastelloy C-22 as rod, plate, sheet and strip, seamless pipe and tube, welded pipe, welded tube, with custom dimensions to your drawing.
Yes. Every order ships with EN 10204 3.1 material certification covering the actual heat analysis. 3.2 documentation is available where the contract requires it.
Stock items ship within 3 to 7 working days. Cut-to-size and forged items typically run 15 to 30 working days depending on quantity and specification. Send us your drawing or enquiry for a firm lead time.
Drawing, grade, dimensions, quantity and delivery date — we price from those.
Request a Quote →Heat analysis certificate issued with every order at no extra charge.
Quality documentation →Shearing, sawing and machining to the tolerances on your drawing.
Capabilities →Buyers often substitute within a family once service conditions, corrosion behaviour or fabrication method narrow the choice.
