Monel K-500 (UNS N05500 / W.Nr. 2.4375)

Monel K-500 (UNS N05500 / W.Nr. 2.4375) is a nickel-copper alloy which combines the excellent corrosion resistance of Monel 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.

Equivalent Grades

Monel K-500Monel K-500N055002.4375

Chemical Composition, %

Monel K-500≤0.025≤0.50≤1.50≤0.020≤0.010≥63.02.30-3.150.35-0.8527.0-33.0≤2.00

Typical Physical and Mechanical Properties (RT, Annealed+Aged)

Density, g/cm3Melting Point, ℃Tensile Strength, MPaYield Strength, MPaELongation, %Hardness, HRB

Available Products and Specifications

Rod, Bar, Wire and ForgingsASTM B865, ASME SB865, DIN 17752, DIN 17753, DIN 17754
Plate, Sheet and StripDIN 17750
Pipe and TubeDIN 17751
Welding Product
OthersASTM B366, ASME SB366, DIN 17743


  • Corrosion resistance in an extensive range of marine and chemical environments. From pure water to non-oxidizing mineral acids, salts and alkalis
  • Excellent resistance to high velocity sea water
  • Resistant to a sour-gas environment
  • Excellent mechanical properties from sub-zero temperatures up to about 480℃
  • Non-magnetic alloy


  • Sour-gas service applications
  • Oil and gas production safety lifts and valves
  • Oil-well tools and instruments like drill collars
  • Oil well industry
  • Doctor blades and scrapers
  • Chains, cables, springs, valve trim, fasteners for marine service
  • Pump shafts and impellers in marine service