Hastelloy N™

General Characteristics of Hastelloy N™

A high-temperature nickel alloy, Hastelloy N™ withstands aging and embrittlement. It resists oxidation for continuous service up to 1800°F (982°C) and for intermittent service up to 1900°F (1038°C).Able to be readily fabricated, it’s ideal for high-heat applications and equipment used with hot fluoride salts.

Chemical Composition of Hastelloy N™

  • Carbon 0.04-0.08
  • Chromium 6.00-8.00
  • Molybdenum 15.00-18.00
  • Iron 5.00 max
  • Manganese 0.8 max
  • Aluminum + Ti 0.5 max
  • Boron 0.01 max
  • Sulfur 0.03 max
  • Nickel remainder

Heat Treatment of Hastelloy N™

    • Solution anneal
      • Heat to 2165°F (1038°C)
      • Soak time depends on thickness
      • Rapidly air cool

Applications of Hastelloy N™

  • Extreme heat uses
  • Equipment used with hot fluoride salts

Machinability of Hastelloy N™

  • Low cutting speeds
  • Use sintered carbide cutting tools and grind to 10-15 degree side rake angle and 6-7 degree side clearance for facing or turning operations
  • Use short drill and grind with minimum clearance to clear the work – generally about 140 degrees total – when drilling
  • Use sulfur-based oil coolant when drilling, or when turning, facing or boring at higher speeds

Workability of Hastelloy N™

  • Readily forged  between 1600°F (871°C) and 2150°F (1177°C)

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