WORLDWIDE MANUFACTURER andDISTRIBUTOR 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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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.
Lab Testing, Evaluation, Alloy Sampling and Shield Prototyping
We’ve helped Electrical Engineers, Designers and other technical professionals to
prototype, sample and fabricate custom magnetic shields for 75 years as of 2016. Using one of our "hands-on" Evaluation Test 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. All three of our Evaluation Lab Kits now contain MuMETAL® Foil and Sheet samples, in addition to Co-NETIC® alloy with high attenuation properties and NETIC® alloy for high saturation applications.
We offer a full range of Manufacturing services:
MuMETAL® For Fabrication of Precision Parts and Enclosures
Laser Cutting Magnetic
Shield Corporationcan 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.
Bending 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
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.
Deep-Drawn MuMETAL® Shielding
Cans MuMETAL® Deep Draw Coil is available for stamping and forming of MuMETAL® Shielding Cans which 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
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.
CNC Precision Machined Tubing Low To High Volume Production
With our NEW
MuMETAL® Round Bar in-stock, we can precision CNC Machine MuMETAL® Tubes
or Pipes, producing hundreds of thousands of Tubular
components. MuMETAL® Bar is typically specified for electrical and
electronic technical applications requiring a magnetic shielding alloywith a high permeability property to reduce low field
disturbances. Other uses of Mu Bar include production of precision machined or
forged components such as current sensors, current transformer cores, or ground
fault circuit breaker relay parts. CNC or computer controlled
machines run automated processes that are highly precise and result in quality
manufactured parts, components, or products. Tube bending, cutting, flaring,
swaging, and shaping are some processes that may be selected in the design and
production of MuMETAL® tubes. Rapid
production runs, high volume parts, close tolerance, and cost efficiency are realized
benefits of CNC technology. Attach your design drawing specs for custom tubing fabrication when submitting a Request for Quote.
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
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.
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
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
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 arnd
soft metals like MuMETAL® and Co-NETIC® alloys.
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
Our engineers are available to perform site surveys under a
consulting contract agreement, reporting our recommendations of how to
mitigate EMI/EMF disturbances.
For fabricated shields, we use MuMETAL® Stress Annealed Alloy.
Engineers and Buyers beware: MuMETAL® is a registered brand of Magnetic
We do 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
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.
Magnetic Shield Corporation
Perfection Mica Company
740 N. Thomas Drive
Bensenville, IL 60106 USAE: firstname.lastname@example.org
P: 888-766-7800 / 630-766-7800
F: 630-766-2813 www.magnetic-shield.com
MuMETAL®, MuRoom®, Co-NETIC®, NETIC®, AA CABLE SHIELD® and INTER-8® CABLE are registered trademarks of Magnetic Shield Corporation, and use of our brands is not permitted without the express written permission of Magnetic Shield Corporation. All rights reserved.Magnetic Shield Corporation FAQ