Monel K-500 Custom Springs

Monel K500 is a precipitation-hardenable nickel-copper alloy that has excellent corrosion resistance. Alloy K-500 has approximately three times the yield strength and double the tensile strength when compared with alloy 400. Monel K-500 has been found to be resistant to sour-gas environments.

Technical Specification Monel K-500
Nominal Composition

Ni: 63.0

Al: 2.30 - 3.15

Cu: 27.0 - 33.0


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