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Monel Alloy K-500

Monel Alloy 400

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

Physical Properties

Density, g/cm3 ………………………..8.44
Density, lb/in.3 ……………………….0.305
Melting Range, °F ……………………2400-2460
Melting Range,°C …………………….1315-1350
Modulus of Elasticity, 103 ksi
Tension ……………………………………26.0
Torsion……………………………………..9.5
Poisson’s Ratio (aged material at room temperature)………0.32

Chemical Composition

Nickel (plus Cobalt) ………………………63.0 min.
Carbon………………………………………….0.25 max.
Manganese …………………………………..1.5 max.
Iron………………………………………………2.0 max.
Sulfur …………………………………………..0.01 max.
Silicon ………………………………………….0.5 max.
Copper …………………………………………27.0 – 33.0
Aluminum …………………………………….2.30 – 3.15
Titanium ……………………………………….0.35 – 0.85

Designation & Standards

MONEL alloy K-500 is designated as UNS N05500 and Werkstoff Nr. 2.4375. It is listed in NACE MR-01-75 for oil and gas service. Alloy K-500 is furnished in a wide range of standard mill forms including pipe, tube, sheet, strip, plate, round bar, flat bar, forging stock, hexagon and wire. Popular forms and sizes are available from stock;
many specialty products may be obtained from converters

Plate, Sheet, and Strip: BS3072NA18 (Sheet and Plate), BS3073NA18 (Strip), QQ-N-286 (Plate, Sheet and Strip),
DIN 17750 (Plate, Sheet and Strip), ISO 6208 (Plate, Sheet and Strip)

Bar, Rod, Wire, and Forgings: BS3075NA18 (Wire), BS3076NA18 (Rod and Bar), ASTM B 865 (Rod and Bar),
DIN 17752 (Rod and Bar), DIN 17753 (Wire), DIN 17754 (Forgings), QQ-N-286 (Rod, Bar, Wire, and Forgings),
SAE AMS 4676 (Rod and Bar), ASME Code Case 1192 (Rod and Bar), ISO 9723 (Bar), ISO 9724 (Wire), ISO 9725 (Forgings)

Pipe and Tube: BS3074NA18 (Seamless Pipe and Tube),DIN 17751 (Pipe and Tube)

Other Products– DIN 17743 (Chemical Composition), SAE AMS 4676 (Chemical Composition), QQ-N-286
(Chemical Composition)

Other Products –ASTM B 366, ASME SB 366 (Welded Fittings), SAE AMS 7233 (Rivets), DIN 17743 (Chemical
Composition)

Applications

Monel 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.
  •  Mounting elements/fasteners, e.g. bolts in sea air and splash water zones.
  •  Tug rope armoring.
  •  Springs.
  •  Components of drilling equipment in the oil industry.
  •  Aircraft instrument components