Monel K500

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Product Description

Monel K500

Monel K500

Monel K500 is a Ni-Cu alloy with age-hardening properties imparted by alloying additions of aluminium and titanium. Its basic composition is similar to that of Monel 400 but the alloying additions make it age hardenable under controlled conditions of temperature and time.

Characteristics of Monel K500

  • excellent corrosion resistance in an extensive range of natural and chemical environments
  • excellent resistance to chloride-ion stress-corrosion cracking
  • very high strength and hardness After age-hardening

After age-hardening of characeristics of Monel K500

  • approximately 2 to 3 times higher mechanical properties than the Monel 400
  • high tensile properties up to about 650℃
  • good fatigue and corrosion fatigue resistance
  • low permeability; non-magnetic down to -135℃

Density: 8.47

Corrosion resistance

In general, the corrosion resistance of Monel K500 Alloy is similar to that of Monel 400 Alloy. Excellent resistance is shown to a wide range of media from pure water to mineral acids, salts and alkalis. Monel K500 Alloy is virtually immune to chloride-ion stress-corrosion cracking. In the aged condition, the alloy may be susceptible to stress-corrosion cracking in moist, aerated hydrofluoric acid vapour at stresses near the yield strength. In high-velocity seawater and in marine atmospheres, good corrosion resistance is shown but, in slow-moving or stagnant seawater, pitting may occur. Monel K500 Alloy also shows good resistance in sour-gas environments.

Applications of Monel K500:

Monel K500 Alloy finds wide application in the marine, chemical, petrochemical and shipbuilding industries.

Typical applications are:

  • valve seals, pump sleeves and wear rings in marine environments – high strength and resistance to seawater
  • pump shafts for fire-fighting pumps – high strength (resulting in smaller diameter shafts) and resistance to flowing seawater
  • fasteners, e.g. bolts, used in marine atmospheres and tidal waters – resistance to chloride-containing environments
  • doctor blades and scrapers
  • towing cable armouring – high strength, non-magnetic properties and resistance to seawater
  • springs – resistance to a variety of corrosive media
  • oil well drilling equipment such as non-magnetic drill collars, valves and instrumentation sleeves – resistance to chloride-containing media and sour-gas environments
  • aviation instrument components – non-magnetic properties

Chemical composition

Ni Fe C Mn Si Cu Al Ti S P Zn Pb Sn
min(%) 63.0 27.0 2.30 0.35
max(%) 2.0 0.18 1.5 0.50 33.0 3.15 0.85 0.010

Mechanical properties

Condition Yield Strength(Mpa) Tensile Strength(Mpa) Elongation(%) Hardness(HB)
ASTM Min Value Soft Annealed Aged 690 965 20 265
Typical Values at RT Hot worked Aged 902 1078 25 305
Typical Values at RT Cold worked Aged 902 1078 22 310
Typical Values at RT Soft Annealed Aged 686 1000 28 285


International Specification Comparison chart

Material Round Bar Plate
JIS NW5500 H4553 H4551
DIN 2.4375 17752



Product: Sheet, Coil, Pipe, Bar, Wire and Forgings