Nickel Alloy X, Hastelloy® X
Also sold as Nickel Alloy X, Hastelloy® X is a popular and effective nickel-chromium-iron-molybdenum alloy. Nickel Alloy X and Hastelloy X offer users a wide range of principal features. These include:
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High degree of oxidation resistance up to 2200° F
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Outstanding high-temperature strength
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Easily fabricated including forming and welding
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Good ductility after prolonged exposure at high-temperatures
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Good resistance to chloride stress-corrosion cracking
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Resistant to carburization and nitriding
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Develops a protective oxide film that does not spall off
Because of its outstanding capabilities, Nickel Alloy X and Hastelloy X are in use throughout the aircraft, furnace, petrochemical, and chemical processing industries. Some of the more popular applications include:
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Gas turbine engines
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Transition ducts
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Combustor cans
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Spray bars and flame holders
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Afterburners, tailpipes, and cabin heaters
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Chemical processing retorts, muffles, and tubing
To be considered Nickel Alloy X or Hastelloy X, an alloy must meet certain levels of chemical composition including:
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Cr 20.5-23%
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Fe 17-20%
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Mo 8-10%
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Mn 1% max
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Si 1% max
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C .05-.15%
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Ni bal
At Continental Steel we have been a supplier of Nickel Alloy X and Hastelloy X in round bar and strip for many years. It is important to note that Nickel Alloy X and Hastelloy X meet the critical ASME Boiler and Pressure Vessel Code, along with other industry standards.
Chemical Composition of Nickel Alloy X and Hastelloy® X
| C | Cr | Co | Fe | Mn | Mo | Ni | P | S | Si | W |
| .05 - .15 | 20.5 - 23.0 | 0.5 - 2.5 | 17.0 - 20.0 | 1.0 max | 8.0 - 10.0 | bal | 0.04 max | 0.03 max | 1.0 max | 0.2 - 1.0 |





