General Description

Mu 85 is a soft magnetic nickel-iron alloy with about 80% nickel, 5% molybdenum, a saturation induction of approx. 0.7 T, the highest technically obtainable permeability, and a very low coercive force.

Typical applications are toroidal tape-wound cores, laminations, shieldings, electromagnetic relays.

Chemical Composition

Grade C% P% S% Mn% Si% Ni% Mo% Cu% Fe%
Mu 85 Max 0.03 Max 0.02 Max 0.02 0.30-0.60 0.15-0.30 79.0-81.0 4.80-5.20 Max 0.20 Bal.

Physical Properties

Density: 8.7 g/cm3

Melting Point: 1400 °C

Curie Temp: 400 °C

Magnetic Properties

Saturation Induction: 0.70

Maximum Permeability: 110,000-260,000

Coercive Force – A/m: 0.7-2.4

Permeability μ 0.08≧: 30,000-55,000

Mechanical Properties

Soft Annealed

Tensile: Min 570 MPa

Yield: Min 160 MPa

Elongation: Min 45%


Wire/Rod, Strip/Sheet, Tube are available

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