Monel 400 Springs

Monel 400 is a solid solution, nearly nonmagnetic, nickel based alloy, roughly two-thirds nickel and one-third copper, possessing a good combination of reasonably high tensile strength and good resistance to corrosion. It is available as wire or strip and is the least expensive of the nickel-base alloys, but it can be used only for cold-formed springs as it cannot be hardened by heat treatment.

Technical Specification Monel 400
  Nominal Composition

  Ni: 63.0 -70.0

  Cu: 28.0 - 34.0
  Density

  0.31 lb./in3
  Modulus of Elasticity (E)

  26 x 106 psi
  Modulus of Rigidity (G)

  9471 ksi
  Coefficient of Expansion

  7.7 µin/in.-°F (70°F)
  Electrical Resistivity

  20.1 µΩ.in
  Thermal Conductivity

  151 Btu/(hr/ft2/in/°F)
  Min Size

  0.032 in (0.81 mm)
  Max Temp

  537oC (1000oF)
  Uses of Monel 400 Springs

  Alloy 400 springs can be used in brackish or seawater, as Monel 400 has excellent cavitation and erosion resistance.