The Hidden Step Behind Magnetic Shielding Performance

Ad-Vance Magnetics Inc. delivers custom magnetic shielding solutions designed to protect sensitive equipment from magnetic interference. 

For mission-critical applications, shielding performance is essential. Proper annealing plays a critical role in ensuring magnetic shielding performs as intended. Without the right annealing process, the material will not achieve the required permeability, and the application will fail. 

Here’s how Ad-Vance’s proprietary annealing processes ensure that doesn’t happen.

The Internal Change: Final Annealing Unlocks Magnetic Shielding Performance

Annealing is a controlled heat-treatment process in which materials are heated to around 2150 °F, changing the magnetic properties of nickel-iron shielding alloys. 

This process relieves stress introduced during fabrication and allows the alloy’s grain structure to recrystallize and grow.

This changes the material’s permeability, which ensures magnetic fields flow around the shield rather than through the shield, essential for shielding success.

Without proper annealing, a magnetic shield would not achieve the right magnetic properties to protect critical devices used in medical, defense, aerospace, and quantum computing applications from magnetic interference.

The Ad-Vance Difference: Specialized Process Controls

Annealing requires careful control of variables such as:

• Exact temperature profiles
• Furnace atmosphere 
• Cooling rates 

Even small variations in the annealing process can affect the magnetic properties of the material.

As a trusted leader in magnetic shielding, Ad-Vance has developed proprietary annealing recipes designed to optimize the magnetic properties of shielding alloys and deliver consistent performance.

You cannot tell whether a material has been properly annealed just by looking at it. That’s why our specialized process is supported by disciplined quality checks to verify that the material and annealing cycle meet established requirements. 

Ad-Vance’s Two-Step Quality Validation

We use two key checkpoints to ensure the material and annealing process meet requirements. 

• Verify the Material Before Fabrication

X-ray fluorescence spectroscopy is used to analyze raw material before production. During this step, we verify the chemical composition of the alloy and confirm it meets industry specifications.

• Verify the Annealing Process

After a part is annealed, we review the furnace charts from the annealing cycle. We compare time, temperature, and atmosphere data against established process requirements to ensure the furnace run followed the validated recipe. 

These checks give customers confidence in the performance of their magnetic shielding. 

Sequence Matters: Anneal Last

Because fabrication processes introduce stress into the material, it is important to complete fabrication before annealing. 

This means stamping, bending, machining, and welding must occur prior to final annealing. 

The same rule applies to hardware. All hardware should be welded to the shield before annealing takes place, making hardware selection an important part of the project planning process. The material must be able to withstand the high temperatures required for annealing. 

This is why it is critical to communicate all shielding assembly requirements at the beginning of a project so we can strategize. Early planning allows the manufacturing team to coordinate fabrication, hardware, assembly, and annealing as one integrated process, helping ensure the finished shield delivers the required performance. 

The Cost of Failure

In many cases, a system’s ability to operate reliably depends on effective magnetic shielding. 

If shielding fails, unwanted magnetic interference can affect sensitive electronics, sensors, imaging equipment, displays, and other critical components.  

In medical applications, for example, magnetic interference can affect sensitive imaging equipment, including MRI and X-ray systems, potentially causing display or image-quality issues. 

In aerospace and defense, interference can affect sensitive electronics and instrumentation, causing display issues in mission-critical environments. 

Annealing: The Ultimate Difference in Shielding Solutions

Fabrication determines the physical shape of a component; annealing unlocks its magnetic performance. 

At Ad-Vance, proprietary annealing processes, material verification, and disciplined quality checks are integrated into our approach to custom magnetic shielding.

By managing the material from fabrication through final annealing, we help customers receive magnetic shielding components designed to deliver reliable performance in demanding applications.

Contact Ad-Vance today for trusted expertise in magnetic shielding and beyond.