WORLDWIDE MANUFACTURER and DISTRIBUTOR Since 1941Magnetic Shield Corporation, a division of Perfection Mica Company, is the premier supplier of custom magnetic shielding alloys and custom-built shields.
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MuMETAL® Products

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MuMETAL® Foil (MU004-8)


MuMETAL® Foil is used primarily in low intensity fields where the highest attenuation, highest initial permeability µ (Mu) and highest shielding efficiency are desired. MuMETAL® Foil is fully annealed and available in stock gauges from 0.002" to 0.010" thickness [0,05mm to 0,25mm].

Foils can be slit to a minimum width of 1/4" (6,35mm). Foil width tolerance is ±0.010" (0,25mm).

Unlike MuMETAL® Stress Annealed Sheet, our Foils do not require re-annealing unless severe forming or heliarc welding is performed.

Note: Priced per linear foot. Volume discounts available.

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MuMETAL® Stress Annealed Sheet (MU014-24-120)

MuMETAL® Stress Annealed Sheet

MuMETAL® is our most widely known brand, yet Magnetic Shield Corporation offers several other alloys which are used for similar, but different applications. MuMETAL® Stress Annealed sheet is used primarily in low intensity fields where high attenuation is desired (high initial permeability & high shielding efficiency). Available as stress annealed (partially annealed for ease of machinability). MuMETAL® is used for fabricated shields such as enclosures, cylinders, cans, channels or 3D boxes. Typically, atmospherically controlled Perfection Annealing is required after stamping, machining, bending, rolling or welding to provide maximum shielding performance.

MuMETAL® alloy is available in many forms, but most ...

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Deep Drawn MuMETAL® Cans

MuMETAL® Shielding Cans


We offer a wide range of 5-sided magnetic shielding MuMETAL® Cans stamped or formed in either ROUND or RECTANGULAR shapes, and deep-drawn up to a 3:1 depth ratio when necessary.  Our standard stock range and custom sizes are available in thicknesses from 0.014’’ to 0.062’’ [0,36mm to 1,57mm thick] and made from various MuMETAL®, Co-NETIC®  or NETIC®  shielding alloys depending on your exact shielding requirements. Typically, our high permeability (µ) 80% nickel-iron MuMETAL® cans are shipped as is since our AA Perfection Annealing method provides a bright nickel appearance after anneal.  We do offer other finishes including plating, electro-polish, powder coating and ...

MuMETAL® Toroidal Cores

MuMETAL® Toroidal Cores

Magnetic Shield Corporation supplies tape-wound MuMETAL® Toroidal Cores to industries requiring High Metering Accuracy (HMA) current transformer cores. By using our proprietary brand of MuMETAL® and properly heat treating in a controlled hydrogen atmosphere furnace, (to a soft magnetic anneal) we maintain close control of the magnetic properties over a broad range of flux densities which permits the most economical and efficient design of your transformer.

We offer a range of wound cores from minimum 1” [25mm] inside diameter to maximum 47.25” [1200mm] outside diameter, using MuMETAL® foil thicknesses ranging between 0.004” [0,1mm] and 0.014” [0,36mm]. Core height is available from ...

MuMETAL® Zero Gauss Chambers

MuMETAL® Zero Gauss Chambers

One of our most popular research products, fabricated from MuMETAL® alloy is the Magnetic Shield Corporation Zero Gauss Chamber. These scientifically engineered chambers provide a laboratory work space of extremely low magnetic field.

MuMETAL® Zero Gauss Chambers have been used worldwide by many universities, private research companies, national laboratories and companies required to provide evidence of military or consumer regulatory compliance. Our chambers are preferred because they are made from high permeability (µ) Stress Annealed MuMETAL®, which provides a consistent, low field test area.

Our standard Zero Gauss Chambers consist of 3-layers and are designed to attenuate external low frequency A.C. ...

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