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Mumetal / Magnetic Shielding Alloy

Mu-metal is a nickel–iron soft ferromagnetic alloy with very high permeability, which is used for shielding sensitive electronic equipment against static or low-frequency magnetic fields.

Mu-metal typically has relative permeability values of 80,000–100,000 compared to several thousand for ordinary steel. It is a "soft" ferromagnetic material; it has low magnetic anisotropy and magnetostriction, giving it a low coercivity so that it saturates at low magnetic fields. This gives it low hysteresis losses when used in AC magnetic circuits.

Other high-permeability nickel–iron alloys such as permalloy have similar magnetic properties; mu-metal's advantage is that it is more ductile, malleable and workable, allowing it to be easily formed into the thin sheets needed for magnetic shields.


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Mumetal / Magnetic Shielding Alloy Wire

Line Number & MaterialDiameterCompositionDescription
NI6541 Mumetal / Magnetic Shielding Alloy Wire 0.125 mmNi77/Fe14/Cu5/Mo4Temper annealed.View item
NI6542 Mumetal / Magnetic Shielding Alloy Wire 0.25 mmNi77/Fe14/Cu5/Mo4Temper annealed.View item

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