Mu 80

General Description

Mu 80 is a nickel-iron-molybdenum alloy with very high initial and maximum magnetic permeabilities and minimal core losses at low field strengths. This vacuum-melted product also offers the advantages of small size and weight in magnetic core and shielding materials. Due to its high magnetic permeability it is used in manufacturing transformers and inductors. Mu 80 is also used as a component for both saturating and non-saturating application.

Chemical Composition

Grade C% P% S% Mn% Si% Ni% Mo% Cu% Fe%
Mu 80 Max 0.03 Max 0.02 Max 0.02 0.60-1.10 0.30-0.50 78.5-80.0 3.8-4.1 Max 0.20 Bal.

Physical Properties

Density: 8.6 g/cm3

Melting Point: 1450 °C

Curie Temp: 420 °C

Magnetic Properties

Saturation Induction: 0.73-0.75

Maximum Permeability: 120,000-250,000

Coercive Force – A/m: 1.0-2.4

Permeability μ 0.08≧: 20,000-35,000

Mechanical Properties

Soft Annealed

Tensile: Min 560 MPa

Yield: Min 150 MPa

Elongation: Min 50%


Permalloy 80

HyMu 80

Magnifer 7904



Wire/Rod, Strip/Sheet, Tube are available

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