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Nickel-based Mu-metal shielding boxes are high-permeability (typically 80% nickel-iron) enclosures designed to attenuate low-frequency magnetic fields. They are essential for protecting sensitive electronics, such as transformers and sensors, by redirecting magnetic flux. These boxes are available in standard rectangular or round shapes, often 5-sided with lids, and are crucial for EMI/RFI shielding.
This video demonstrates how to use mumetal foil to create effective magnetic shielding:
Key Features and Applications
- High Permeability: Made of materials like 1J85 or 80% Nickel-Iron, these provide superior attenuation of low-frequency magnetic fields.
- Construction: Often engineered using deep-draw techniques, providing consistent shielding thickness (e.g., 0.014 in to 0.062 in).
- Applications: Commonly used to shield sensitive equipment from outside interference or to stop a component's internal field from affecting others.
- Customization: Available through manufacturers like Magnetic Shield Corporation which offers custom sizes, and custom finishing such as electro-polish, plating, or painting.
- Performance Enhancement: Multiple layers or high-permeability alloys are used when superior shielding is required to avoid saturation.
Key Considerations
- Annealing: The effectiveness relies on "perfection annealing" after fabrication to restore high permeability, giving them a bright nickel appearance.
- Saturation: If the external magnetic field is too high, the shield can saturate, reducing its efficiency.
- Alternatives: For specific needs, alloys such as Co-NETIC® B are also available.
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Nickel Iron Based Mu Metal Shielding Box Suppliers ...
Jiangsu Hongyun Precision Industry Co., Ltd.
https://www.hongertech.com › nickel-iron-based-mu-m...
Jiangsu Hongyun Precision Industry Co., Ltd.
https://www.hongertech.com › nickel-iron-based-mu-m...
Deep Drawn Mu-metal Shielding Cans are designed for protecting sensitive circuits from unwanted parasitic magnetic fields, they are typically applied in audio ...Read more
MuMetal® Magnetic Shielding for Sensitive Environments
Magnetic Shields USA
https://magneticshields-usa.com › mumetal-magnetic-sh...
Magnetic Shields USA
https://magneticshields-usa.com › mumetal-magnetic-sh...
MuMETAL® Foil is a fully annealed, high-permeability nickel iron alloy designed for applications requiring the highest magnetic attenuation and shielding ...Read more
Missing: Mu ‎Metal
Low Cost Magnetic + Electrical Shielding Enclosure
EEVblog
https://www.eevblog.com › forum › metrology › low-c...
EEVblog
https://www.eevblog.com › forum › metrology › low-c...
Aug 23, 2025 — Planning on creating my own custom magnetic + electrical shielding enclosure to perform more metrology-grade measurements.Read more
Shielding Cases / Boxes / Cans
Jiangsu Hongyun Precision Industry Co., Ltd.
https://www.hongertech.com › shielding-cases-boxes-ca...
Jiangsu Hongyun Precision Industry Co., Ltd.
https://www.hongertech.com › shielding-cases-boxes-ca...
Nickel Based Mu Metal Shielding Case · Ni80 Permalloy Shielding Case for Current Transformer · Mu Metal Shielding Box for Inductors.Read more
MuMetal Shielding: Magnetic Field Protection Explained
Domadia
https://domadia.net › understanding-mu-metal-shielding...
Domadia
https://domadia.net › understanding-mu-metal-shielding...
Dec 14, 2024 — The mumetal shield is recognized as a premier high-permeability alloy, primarily composed of approximately 77% nickel, 15% iron, and enhanced ...Read more
Magnetic Shield Corporation | Magnetic Field Shielding Alloys
Magnetic Shield Corporation
https://www.magnetic-shield.com
Magnetic Shield Corporation
https://www.magnetic-shield.com
Magnetic Shield Corporation manufactures and supplies magnetic field shielding MuMETAL®, specialty alloys, custom fabrication, products, and solutions.
4 Ways of Reducing Cost of Magnetic Shielding
Integran Technologies
https://www.integran.com › post › 4-ways-of-reducing-...
Integran Technologies
https://www.integran.com › post › 4-ways-of-reducing-...
Feb 4, 2013 — MuMetal and other high nickel content specialty metal alloys are commonly used for high performance magnetic shielding (aka ELF shielding or ...
Mu-metal
Wikipedia
https://en.wikipedia.org › wiki › Mu-metal
Wikipedia
https://en.wikipedia.org › wiki › Mu-metal
Mu-metal, or μ-metal, is a soft nickel–iron ferromagnetic alloy with very high permeability, which is used for shielding sensitive electronic equipment ...Read more
Mumetal Shielding Box(34)
Alibaba.com
https://www.alibaba.com › ... › Paper Boxes
Alibaba.com
https://www.alibaba.com › ... › Paper Boxes
Constructed from high-permeability nickel-iron alloys, these boxes are essential in environments where sensitive electronic components must operate without ...Read more
A low-noise multilayer mu-metal thin shell magnetic shield ...
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
by Y Gao2023Cited by 30 — A multilayer mu-metal thin-shell structure is proposed to replace the conventional single-layer mu-metal structure with the same thickness.Read more