Mu-metal Shielding Solutions
High-permeability magnetic shielding components designed to attenuate low-frequency and DC magnetic fields.
What is Magnetic Shielding?
Magnetic shielding is the process of redirecting magnetic flux away from sensitive regions using high-permeability materials. Mu-metal and related alloys provide a low-reluctance path for magnetic fields, preventing interference with critical systems.
Materials Used: Mu Metal, 48% NiFe, 80% NiFe, Pure Iron
High Permeability
Efficient attenuation of low-frequency magnetic fields
Signal Integrity
Critical for high-gain analog and sensing systems
Functional Importance
- Minimizing magnetic interference
- Enhancing signal integrity
- Improving sensor stability and reducing drift
Why Hydrogen Heat Treatment is Non-Negotiable
Mu-metal is a stress-sensitive material. Mechanical processes like cutting, bending, and forming disrupt the grain structure, causing loss of shielding performance.
Controlled Dry Hydrogen Annealing:
- Relieves internal stresses
- Re-aligns microstructure
- Restores magnetic permeability
How PML Manufactures Mu-metal Shields
Understand Requirement
Application, environment, and shielding objectives defined.
Study Drawings
Detailed analysis of specifications and constraints.
Process Design
Engineering the optimal manufacturing route.
Tooling & Planning
Precision tooling and production workflow setup.
Precision Forming
High-accuracy shaping with minimal stress induction.
Hydrogen Annealing
Critical step to restore magnetic performance.
Testing & Validation
Magnetic properties verified against specifications.
Traceability
End-to-end material and process tracking.
Built for Scale, Not Just Development
Mu-metal shielding is often treated as a lab-level solution. At PML, it is a fully industrialized capability with a proven ecosystem designed for repeatability, consistency, and volume production.
Established Supply Chain
Reliable sourcing of high-permeability alloys.
Controlled Hydrogen Annealing
Ensures uniform magnetic performance.
Precision Forming
Maintains shielding integrity with minimal stress.
Production-Ready Tooling
Designed for repeatability across volumes.
Consistent Output
Uniform quality across batches.
Scalable Manufacturing
Supports prototype to full production.
Applications Across Industries
✈️ Aerospace
Used in: FOG IMUs, MEMS IMUs, Flight Control Systems
Why shielding matters: Ensures accurate motion sensing and stable flight control.
🛡️ Defense
Used in: Missile GNC, EO/IR Gimbals, INS
Why shielding matters: Enables precise targeting and navigation in high-interference environments.
🚢 Naval
Used in: Gyrocompass Systems, INS
Why shielding matters: Maintains accurate direction and navigation at sea.
🚁 UAVs
Used in: MEMS IMUs, Stabilization Systems
Why shielding matters: Ensures stable autonomous flight and motion control.
🛢️ Oil & Gas
Used in: Downhole navigation systems
Why shielding matters: Enables accurate positioning in GPS-denied environments.
🚇 Infrastructure
Used in: Tunneling and underground navigation systems
Why shielding matters: Ensures directional accuracy in constrained environments.
Why Partner with PML?
Years of Expertise in magnetic and sensing solutions
Manufacturing processes accredited to ISO, IATF, AS9100 stringent quality requirements
Global Compliance: RoHS, REACH, and UL94 V0 standards met
Process Integrity
Manufacturing designed to preserve magnetic properties through every stage
Optimized Permeability
Microstructure engineered for maximum magnetic shielding
Total Traceability
Magnetic properties validated against application requirements
Ready to Power Your Next Innovation?
Our engineering team can help you select the right lamination solution or develop custom tooling for your project.
Contact Our Engineers