MuMETAL® Manufacturers and Companies

IQS Directory is a top industrial directory listing of leading industrial MuMETAL® manufacturers and suppliers. Utilize our website to review and source MuMETAL® manufacturers with preview ads and detailed product descriptions. These MuMETAL® companies can design, engineer and manufacture MuMETAL® to your specifications and application need. A quick and easy to use request for quote form is provided for you to contact these MuMETAL® manufacturers and suppliers. Each company has detailed profile information, locations, phone number, website links, product videos and product information defined. Read customer reviews and product specific news articles. We are the right resource for your information requirement whether its for a manufacturer of MuMETAL® sheet or MuMETAL® tape.

  • San Fernando, CA

    Spira Manufacturing Corp. offers the most reliable EMI gaskets & shielding for the electrical / electronic industries to meet required EMC/EMI shielding regulations. We have been providing reliable, cost-effective EMI & RFI shielding solutions for over 30 years, and to this day we continue to provide EMI products with innovation & expertise. Spira is an AS9100 and ISO 9001:2008 certified company.

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  • Lancaster, NY

    Sealing Devices is a leading North American distributor and fabricator of EMI shielding products, including conductive elastomers, Soft-Shield® low closure force gasketing, windows, conductive adhesives, formed-in-place parts, vents as well as elastomers, pads and tapes used for managing related thermal applications. The company is ISO 9001:2008 registered.

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  • Sweetwater, TX

    We are one of the first in EMI technologies! Our roots trace back as early as the 1930s. We work hard to bring you the latest and greatest in EMI technologies and distribution. ADIT Electron Tubes manufactures low-level light detection systems and devices. Our photomultipliers are apart of a major international industry that we are a supplier of. Call us today for more information about our EMI technologies!

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  • Los Angeles, CA

    FMS has been eliminating electromagnetic interference (EMI) and radio frequency interference (RFI) issues in commercial & industrial buildings, medical facilities, and research laboratories for over 25 years. Using the latest technology, backed by independent research and development, FMS delivers customized, innovative mitigation solutions for the most complex interference problems worldwide.

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MuMETAL® Industry Information


MuMETAL® is used primarily in low intensity fields where high attenuation, high initial permeability, and high shielding efficiency are desired. Available as stress annealed (partially annealed for ease of machinability), sheet stock is used for fabricated shields, such as enclosures, cylinders, cans, channels, or 3D boxes.

Quick links to MuMETAL® Information

Applications of MuMETAL®

Typically, atmospherically controlled annealing is required after stamping, machining, bending, rolling, or welding to provide maximum shielding performance. MuMETAL® Stress Annealed alloy is available in many forms, but most shields are fabricated from our sheet stock in gauges from .014" to .062" thickness [0,36mm to 1,57mm]. MuMETAL® Foil is fully annealed and available in stock gauges from .002" to .010" thickness [0,05mm to 0,25mm].

MuMETAL® Design and Function

MuMETAL® is typically stocked in a stress annealed state to allow further fabrication, stamping, severe forming, or welding. During fabrication, a material’s grain structure is weakened. After final fabrication processes are completed, grain structure is then modified by controlled atmospheric annealing to relieve stress in the material, resulting in larger grain structure, softer temper, and ultimate shielding performance. Although MuMETAL® is available in many forms, most shields are fabricated from foil or sheet stock.

Benefits of Using MuMETAL®

When your shield design requires severe forming, stamping, and/or welding, specifying MuMETAL® on your drawings ensures you will receive the highest level of initial permeability and shielding efficiency available. MuMETAL® is formulated and manufactured to exacting standards, which allows for consistent fabrication and final anneal. Not only does Magnetic Shield Corporation offer MuMETAL® alloy, we can provide a full range of manufacturing services. From your drawing or sketch, we can waterjet, laser, EDM, shear, slit, punch, blank, stamp, chemical etch, form, bend, roll, spot-weld, heliarc weld, and/or laser weld. Using MuMETAL® alloy, we can produce complete magnetic shields to your drawings or specifications.

Chemical Composition of MuMETAL®

MuMETAL® Chemical Composition % In Weight*

Nickel (Ni) 80-81%

Molybdenum (Mo) 4.5-6%

Silicon (Si) 0.05-0.4%

Manganese (Mn) 0-0.5%

Carbon (C) 0.01%

Iron (Fe) Balance

*Composition may vary by production lot.

MuMETAL® Properties


0.2% Yield Strength 49ksi (338 MPa)
Density 0.316 lb/in³ (8.7 g/cm³)  

Tensile Strength 99 ksi (682 MPa)

Electrical Resistivity 60 micro-ohm cm

Elongation 32% in 2" (51 mm)

Grain Size ASTM 7 or finer

Hardness 15T 85


DC µ @ 40 gauss 80,000

DC µ @ 100 gauss 105,000

DC µ maximum 350,000

DC Hc 0.0005 Oe

DC Br (gauss) 4,000

AC 60Hz @ 40 gauss 65,000

*Data are typical of .014" [0.36mm] annealed sample and should be not be construed as maximum or minimum values for specification or final design. Data for each material thickness and/or lot may vary.

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MuMetal® Informational Video