Monel K-500

Monel K-500 (Alloy K-500)

(UNS N05500) (EN 2.4375 - NiCu30Al)

MONEL® alloy K-500 (UNS N05500/ W.Nr. 2.4375) is a nickel-copper alloy which combines the excellent corrosion resistance of MONEL alloy 400 with the added advantages of greater strength and hardness. The increased properties are obtained by adding aluminum and titanium to the nickel-copper base, and by heating under controlled conditions so that submicroscopic particles of Ni3 (Ti, Al) are precipitated throughout the matrix. The thermal processing used to effect precipitation is commonly called age hardening or aging.

Alloy K-500 is characterized by:

  • Excellent corrosion resistance in many applications of offshore engineering and the chemical process industry.
  • Very good resistance against chloride-induced stress corrosion cracking.
  • Non-magnetic down to -100 °C (-148 °F).

Chemical Composition

Physical Properties

Product Designations & Standards


Typical applications for MONEL alloy K-500 products are chains and cables, fasteners and springs for
marine service; pump and valve components for chemical processing; doctor blades and scrapers for
pulp processing in paper production; oil well drill collars and instruments, pump shafts and impellers,
non-magnetic housings, safety lifts and valves for oil and gas production; and sensors and other electronic components.

Alloy K-500 is used in sea water, offshore engineering, in the chemical process and petrochemicals industry and shipbuilding.

Typical applications are:

  • Valve seals, pump sleeves and wearing rings in sea water.
  • Pump shafts and propeller shafts.
  • Springs

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