Hastelloy® Nickel Alloys
The premier family of nickel-molybdenum-chromium alloys designed for exceptional corrosion resistance. Hastelloy alloys are the standard for handling the most aggressive chemicals, including strong acids, wet chlorine, and chlorides.
Hastelloy C-276
The "go-to" alloy for universal corrosion resistance. It has resisted the formation of grain boundary precipitates better than any other alloy, making it suitable for most chemical process applications in the as-welded condition.
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Hastelloy C-22
An upgrade to C-276 with higher Chromium. This gives it superior resistance to oxidizing chemicals and better overall resistance to localized pitting and crevice corrosion in stagnant environments.
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Hastelloy B-2
A nickel-molybdenum alloy with significant resistance to reducing environments, specifically Hydrochloric Acid (HCl). Note: It has poor corrosion resistance to oxidizing environments.
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Hastelloy X
Unlike the C and B series, Hastelloy X is primarily a high-temperature alloy. It combines oxidation resistance, fabricability, and high-temperature strength, widely used in petrochemical furnaces and gas turbines.
View Hastelloy X DetailsWhy Choose Hastelloy?
The Hastelloy family is defined by the high addition of Molybdenum (Mo). Molybdenum is the key element that provides resistance to pitting and crevice corrosion in reducing environments.
When chemical plants deal with "upset" conditions—where mixtures of acids, chlorides, and solvents occur unpredictably—Hastelloy C-276 and C-22 are often the only materials that survive.
| Alloy | UNS No. | Best Environment | Weakness |
|---|---|---|---|
| Hastelloy C-276 | N10276 | Universal. Excellent in wet chlorine, hypochlorite, and mixed acids. | Slightly less resistant to strong oxidizers than C-22. |
| Hastelloy C-22 | N06022 | Superior in oxidizing environments (Nitric acid) and stagnant waters. | More expensive than C-276. |
| Hastelloy B-2 | N10665 | Pure reducing acids: Hydrochloric acid at all concentrations. | Fail rapidly in presence of ferric/cupric salts (oxidizers). |
| Hastelloy X | N06002 | High heat (2200°F). Oxidation and stress-corrosion cracking resistant. | Not designed for aqueous corrosion like C-series. |
Need Hastelloy for Severe Environments?
We stock Hastelloy C-276, C-22, and B-2 in plate, sheet, bar, and pipe. We also provide cut-to-size services.
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