Monel K500 Round Bar

Monel® K500 is a nickel-copper alloy with age hardening properties imparted by alloying additions of aluminum 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. This alloy can be delivered in the annealed, stress equalized, hot finished or age-hardened conditions.  

Common  Names

  • Monel® K500
  • Alloy K500
  • Monel® alloy K-500

Alloy K500 Chemical Composition

Alloy K500 Chemical Composition
  Element Percent by Weight
Ni Nickel 63% min
Mn Manganese 1.50% max
Si Silicon 0.50% max
Fe Iron 2.00% max
Al Aluminum 2.30% - 3.15%
S Sulfur 0.010% max
C Carbon 0.18% max
Cu Copper 27.0% - 33.0%
     

Common Applications of K500

Monel® K-500 alloy finds wide applications in the marine, chemical, petrochemical and shipbuilding industries. Typical applications include:
  • 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
  • Propeller shafts - high strength (resulting in smaller diameter shafts and thus smaller bearings) and resistance to seawater
  • Fasteners e.g. bolts, used in marine atmospheres and tidal waters - resistance to chloride - containing environments
  • Doctor blades and scrapers
  • Towing cable armoring - 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

Characteristics of Alloy 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 Monel® K500 alloy has:

  • Approximately 2 to 3 times higher mechanical properties than Nickel-copper Monel © 400
  • High tensile properties up to about 650°C (1200°F)
  • Good fatigue and corrosion fatigue resistance
  • Low permeability; non-magnetic down to -135°C (-210°F)

Metallurgical Structure

  • Monel® K-500 alloy has a face-centered cubic structure. In the age-hardened Condition a Ni3Al phase is formed with similar structure.