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Monel 400, UNS N04400

Monel® was created by the International Nickel Company and patented in 1906. The patent has expired and it is available from a variety of sources. Alloy 400 is versatile and is used to resist both acids and alkalis. Seawater applications are common. A variant is Alloy 405 (UNS N04405). It contains slightly more sulfur, which improves machinability.


  • Lock Nuts
  • Set Screws
  • Dowel Pins
  • Pipe Plugs
  • Vented Screws
  • 12-Pt Flange Screws
  • Custom Fasteners


  • Plate, Sheet & Strip: ASTM B127, ASME SB127
  • Rod & Bar: ASTM B564, ASME SB564

Material Properties

Material Properties: Alloy 400

Technical Data Sheet

Industries & Applications

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