Monel K-500 Custom Springs

Monel K-500 is quite similar to Monel 400 and also is composed of about two-thirds nickel and one-third copper except that the addition of small amounts of aluminum and titanium transposes it to the precipitation-hardening group of alloys. It is often used in sizes larger than is customarily used for Monel 400, as it may be formed in the soft or nearby hard condition and then heat treated. It is nonmagnetic.

Technical Specification Monel K-500
Nominal Composition

Ni: 63.0

Al: 2.30 - 3.15

Cu: 27.0 - 33.0

Density

0.305 lb./in3

Modulus of Elasticity (E)

26 x 106 psi

Modulus of Rigidity (G)

9.5 x 106 psi

Coefficient of Expansion

7.6 µin/in.-°F (70°F)

Electrical Resistivity

370 µΩ.cm

Thermal Conductivity

121 Btu/(hr/ft2/in/°F)

Min Size

0.018 in (0.457 mm)

Max Temp

260oC (500oF)

Uses of Monel K-500 Springs

The combination of very low corrosion rates in high-velocity sea water and high strength make alloy K-500 particularly suitable for shafts in marine service