AD-MU Magnetic Shielding Materials

If you want to design and manufacture prefabricated magnetic shields in-house, AD-MU magnetic shielding alloy sheet stock material is readily available and easy to work with. It may be formed by bending, stamping, drawing etc. on ordinary sheet metal working equipment. AD-MU magnetic shielding material can be finished by plating or MIL spec painting. AD-MU-80 and AD-MU-48 magnetic shielding materials meet ASTM A-753 and is equivalent to MIL-N-14411c which is now obsolete.

How to Choose the Correct Alloy for Your Application

For Low Permeability magnetic shielding requirements, use AD-MU-00. For Medium Permeability magnetic shielding requirements, use AD-MU-48. And for High Permeability magnetic shielding requirements, use AD-MU-80. AD-MU-80 is recommended for uniformity of residual fields on sensitive applications.

Multi-Layer Magnetic Shields

Many magnetic shielding problems are optimally solved by using a combination of alloys. In between each layer it is recommended that there is an air gap, so there is no metal to metal contact. Spacing material may be used as well in multi-layer magnetic shields. When using spacers, please remember to use material that is non-conductive, such as wood or glass epoxy.

Heat Treating Magnetic Shields

Magnetic shields will need to be heat treated for optimum magnetic shielding characteristics. Heat treating should take place after all fabrication processes have been completed, from welding and bending to rolling and machining operations.

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These time-saving High and Low Permeability magnetic shielding foils offer convenient and economical magnetic shielding. Their use can often eliminate the cost of designing and manufacturing prefabricated magnetic shields. Magnetic shielding foil is also useful in hard-to-get-at places. In addition, it permits more compact assemblies accomplished by placing magnetically reacting components closer together with no performance degradation.

These magnetic shielding foils exhibit useful ductility, so are readily hand trimmed to your desired outline on an ordinary cutting board. Or with shears. They are then easily hand formed around the structure or component to be magnetically shielded. Simple adhesive tape can be used to hold them in place. AD-MU-80 foil material has already been properly heat treated.

Adhesive Backed Foil

AD-MU high and low permeability magnetic shielding foils can be furnished with a double-faced pressure sensitive adhesive backing. The adhesive bonds to glass tubes, instruments or other components being shielded. This option can be added to any length, width or thickness of AD-MU foil.

AD-MU Bar stock is offered in a round bar and square bar form. Custom sizes are available at a special run price. Contact Ad-Vance Magnetics for details.

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