WORLDWIDE MANUFACTURER and  DISTRIBUTOR Since 1941 Magnetic 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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Custom Magnetic Shields and Production Volumes
Magnetic Shield Corporation provides fabricated shields to thousands of customers worldwide. For fabricated shields, we use MuMETAL® Stress Annealed Alloy - see more about our material selection below. If you need a prototype shield made, our shop can fabricate it and Perfection Anneal it for you. Our machine shop hand-crafts an accurate sample using machine shop equipment and stock tooling. Whether you need one prototype or hundreds for validation testing, send your sketch or drawings here so we may provide you with a timely quote. For production quantities, contact our Sales Department for annual or production volume pricing.

Fabricated Box Fabricated CylinderFabricated EnclosureCustom Fabricated Shape 

Evaluation, Sampling and PrototypingLab Kits Brochure
We’ve helped Electrical Engineers, Designers and other technical professionals to prototype, sample and fabricate custom magnetic shields for over 60 years. Using one of our "hands-on" Evaluation Kits, you can prototype your shield with everyday common hand-tools, or bench-top equipment. Once your prototype is complete, we can fabricate more accurate validation samples or pre-production parts to your specifications or drawings. With an extensive range of equipment and tooling, our quick-turn prototyping and annealing services are regularly used by customers for fit and functional testing, prior to production builds.

Ask us about Design Reviews and Site Surveys --- we can assist you now with our Engineering expertise and support.

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We offer a full range of Manufacturing services:

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Laser Cutting

• Water-jet

• Chemical Etching

• Welding (Spot, Heliarc, Laser)



• Stamping

• Rolling

• Punching

Deep-drawing   > VIEW VIDEO

• EDM Shearing

• Slitting

Metal Spinning

• Milling

• Core Winding

• Drilling

• Boring

• Winding 

Learn about our Annealing services, Finishing services, Deburring, and Aqua Blasting.

Laser Cutting
Magnetic Shield Corporation can laser cut our MuMETAL®, Co-NETIC®, and NETIC® materials which provide high accuracy, high quality parts, or precise blank
sizes. Using a laser provides clean cut edges without burr or dust formation.

Laser Cutting

With a LVD Easy-Form® press brake, our stress annealed sheet material can be formed with predetermined bends by clamping the work piece between a matching punch and die. The precision-ground tooling assures accurate bend angles along the entire bending length.


Metal Spinning
A metalworking process performed on a lathe. It is the forming of an axis-symmetric part over a rotating mandrel. Force is delivered by a tool with a rounded end or a roller. A flat, or possibly preformed, work piece is held between a mandrel and tail stock. As the apparatus rotates, the tool applies localized pressure to the work while it gradually moves up the mandrel. This causes the sheet metal work to be wrapped over the mandrel, thus taking its shape.

Metal Spinning

Deep-Drawn MuMETAL® Shielding Cans
Our MuMETAL® Cans provide excellent low frequency magnetic field attenuation with low coercive forces and are used in many industries for protecting critical devices from magnetic interference, electromagnetic radiation and cross-talk signals. Products using MuMETAL
® magnetic shielding cans include high-end audio amplifiers, current transformers, specialty transformers and other distinct electrical/electronic & printed circuit board (PCB) components. Our cans are easily integrated into circuits so this shielding method may be found in audio, automotive, automation, power supply and power generation sectors.

We also produce specific form tooling and custom size production cans for many of our clients. Manufacturing new tooling normally takes approximately six weeks before supply of the first prototypes for approval but we can produce hand-made prototypes of a new design in 2-3 weeks to verify the product prior to any tool cost being incurred.

All of our shielding enclosures can be supplied with either inside or outside tight fitting Lids, creating a 6-sided shielding enclosure. MuMETAL® Cans are not automatically supplied with Lids; if you require them for your application, please specify this at the time of placing your inquiry.  All of our Lids and Cans may be further machined to include holes/slots configured for your wiring 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 paint.

Smaller quantities of Cans, or Cans that may be of larger size, or of a thicker material can be fabricated using traditional methods, including Spinning, CNC forming
and TIG welding.

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Deep-Drawn MuMETAL® Cans: Low-frequency EMI Shielding


After a full magnetic anneal, MuMETAL® and Co-NETIC® shielding alloys exhibit a clean, bright surface condition. Also, because of its high nickel content, these
alloys are corrosion resistant. Consequently,
MuMETAL® and Co-NETIC® shielding alloys are usually used as annealed, without further finishing operations. But, there is a variety of finishing operations available to customers requiring additional corrosion resistance or cosmetically pleasing finished parts. Other purposes for finishing include preparing surfaces for paint adhesion and achieving a specific micro-inch (µin) finish.

We can offer the following Finishing services:

Aqua Blasting





Powder Coating

Sand Blasting




If your process or machines shear, plasma cut, water jet, punch, laser, or mill, there will be burrs. There are many manual machines and automatic machines that can remove burrs for ensuring the functionality of the machined part, as well as the safe handling of the part.

With a Fladder® Danmark A/S machine we can deburr or sand work pieces from all angles within the four parameters which are normally synchronized in pairs. If the RPM of the abrasive tools or the feed speed of work pieces is altered, the other parameters change automatically. Each function may also be 100% manually operated.

Also, with a metal vibratory finishing machine we can deburr products and remove sharp edges. Your parts are placed inside a drum filled with abrasive pellets and a substrate, then tumbling vibration is used to create a uniform random texture. The machine’s cycle speed and magnitude of vibration are usually variable, allowing effective treatment for a range of small- to large-sized parts.

 Fladder® Danmark A/S MachineDeburring - Metal Vibratory Finishing Machine

Aqua Blasting
Aqua blasting also known as vapor blasting, is a wet blasting process utilizing 100/150 micron glass media suspended in a high pressure water system - unlike shot blasting this process is non-aggressive. Aqua/Vapor Blasting is both highly effective and gentle at the same time - the process cleans very effectively without removing any other underlying metal or substrate. This allows for the cleaning of delicate parts and soft metals like MuMETAL® and Co-NETIC® alloys.

Design Review
Upon receipt of your custom design by drawing and/or specification, our technical team can review your design, provide valuable input, and fabricate your shield. As an
ISO 9001:2008 certified supplier, we are prepared to manufacture to your specifications. We are a diverse company, offering a broad range of production capabilities and solutions.

Site Surveys
Our engineers are available to perform site surveys under a consulting contract agreement, reporting our recommendations of how to mitigate EMI/EMF disturbances.

Material Selection
For fabricated shields, we use MuMETAL® Stress Annealed Alloy. Engineers and Buyers beware: MuMETAL® is a registered brand of Magnetic Shield Corporation.
We doMuMETAL® Alloy not support other companies that sell shielding materials they claim are "mumetal" - it is not a generic name but a registered, proprietary brand that we certify to exacting quality standards and material specifications. MuMETAL® is the most commonly used shielding alloy because of its reputation as a highest permeability shielding alloy available. MuMETAL® is generally available for fabrication and must be annealed after welding, forming or bending.

Need more sample material or larger sizes? We can shear or slit our stock sizes to meet your needs. Most of our alloys are sold by the foot so you can purchase in small quantity for further evaluation and sampling.

Engineering Support and Quotes
You are invited to call our Engineering Department to discuss your design requirements and to send a sketch or drawing for a prompt quotation. And, with our decades of hands-on experience, you can be certain you are not wasting valuable time or funding.

Send quote requests with drawings or specifications to us, or contact our Engineering Department with any specific questions.

Request Quote  - Fabrication  Fill out our quick form.  Enter your comments/questions and click

Submit to send us an email.  You may attach a design drawing file for review.  Thanks!

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