General Description

Mu 49 (FeNi50) is a soft magnetic alloy, consisting of 49% Nickel, balance Iron, it has a saturation induction of 1.55 T and high permeability, used where high initial permeability, maximum permeability, and low core loss is needed.

Chemical Composition

Grade C% P% S% Mn% Si% Ni% Fe%
Mu 49 Max 0.03 Max 0.02 Max 0.02 0.30-0.60 0.15-0.30 49.0-50.5 Bal.

Physical Properties

Density: 8.25 g/cm3

Curie Temp: 470 °C

Electrical Resistivity: 0.45 μΩ·m

Magnetic Properties

Saturation Induction: 1.55T

Maximum Permeability: 60,000

Coercive Force – A/m: 4.8-20

Mechanical Properties

Soft Annealed

Tensile: Min 450 MPa

Yield: Min 150 MPa

Elongation: Min 35%


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