MONEL® K500 2.4375 – UNS N05500 – NiCu30Al

MONEL®alloy K-500 (UNS N05500/ W.Nr. 2.4375) is a nickel-copper alloy which combines the excellentcorrosion 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 oraging. 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 oiland gas production; and sensors and other electronic components.


seamless-pipe Seamless Tubes

welded-pipe Welded Tubes
plate Plates
bar Bars  stock
flanges Flanges
accessories Fittings


  • Processes involving organic acids, caustic soda and dry chlorine
  • Production of chlorinated plastics
  • Applications include doctor blades and scrapers
  • Propellers and Shafts, Fasteners, Gyroscopes
  • Pump shafts, Valve stems, Drill collars

General characteristics

  • High strength and hardness
  • Excellent corrosion resistance
  • Resistant to chloride stress corrosion
  • Good resistance to impingement attack
  • High fatigue strength in seawater
  • Low magnetic permeability

Technical information



K500 – UNS N05500
Product Norm ASTM
Seamless Tubes
Welded Tubes  
Bars A-865

Chemical specifications %


K500 – UNS N05500
Element Simbol Maximum %
Carbon C 0,18
Manganese Mn 1,50
Phosphorus P 0,0
Sulfur S 0,10
Silicon Si 0,50
Nickel Ni >63,0
Copper Cu 27,0-33,0
Aluminum Al 2,30-3,15
Iron Fe 2,0
Titanium Ti 0,35-0,85

Mechanical Properties

K500 – UNS N05500
Norm Form & Cond. Rm min. Rp 0,2% min. E4d min.% Z min.% I.T.(J) HR B HB
A-182 A 140 (965) 100 (690) 20 27 265
B 135-145 (930-1000) 95-110 (655-760) 15-20 25-32 255-300
C 130 (895) 85-90 (585-620) 20 24 250

A = Rounds and forgings, hot worked and age hardened, all sizes
B = Rounds, Cold worked and age hardened,
C = Rounds and forgings, annealed and age hardened