Hastelloy X

Hastelloy X 丨 UNS N06002

Hastelloy X, also known as UNS N06002, is a nickel-chromium-iron-molybdenum superalloy. This alloy has outstanding oxidation resistance possesses exceptional strength at elevated temperatures, and is one of the most widely used nickel-base superalloys for gas turbine engine components. Molybdenum enables this alloy to be hard, strong, and suitable for welding applications. Alloy X is non-magnetic and has high strength up to 1500°F (816°C), good oxidation resistance up to 2200°F (1204°C), and good formability and machinability.

Hastelloy X / Nickel Alloy X / UNS N06002 / W.Nr 2.4665

Applications of Hastelloy X :

  • Industrial and aviation turbines (combustion chambers, rectifiers, structural covers).

  • Industrial furnace components, support rollers, grates, ribbons and radiant tubes.

  • Petrochemical furnaces in the spiral tube.

  • High temperature gas cooling nuclear reactor.

Normal product forms: wires, rods, bars, sheets, plates, and pipes.

Specifications/Standard: AMS 5536, ASTM B435, AMS 5754, ASTM B 572

Chemical Composition:

  • Nickel (Ni): Balance

  • Chromium (Cr): 20.5-23%

  • Iron (Fe): 17-20%

  • Molybdenum (Mo): 8-10%

  • Manganese (Mn): ≤1%

  • Silicon (Si): ≤1%

  • Carbon (C): 0.05-0.15%

  • Cobalt (Co): 0.5-2.5%

  • Tungsten (W): 0.2-1%

  • Boron (B): ≤0.01%

  • Copper (Cu): ≤0.5%

Physical Constants and Thermal Properties

  • Density: 0.297 lb/in³ (8.22 g/cm³)

  • Melting Range: 2300 – 2470°F (1260 – 1355° C)

  • Thermal Conductivity: 9.1 W/m·K at 21°C, increasing with temperature

  • Electrical Resistivity: 115.8 microhm-cm at 21°C, increasing with temperature

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