Electromagnetic interference, otherwise known as EMI, is an annoying problem that many electronic devices experience. The solution to this problem is the proper usage of electromagnetic shielding. While there are many kinds of electromagnetic shielding, there are some materials that simply do a better job at protecting against any interference. In addition to the thickness of the material and the shape of the shielding, the material itself is one of the most important aspects of creating a proper electronic device. Here, we’ll go over some of the best metals to protect against EMI so you feel prepared when you need to make the decision.


Aluminum is one of the most widely used materials for electromagnetic shielding given how non-ferrous it is. It’s also one of the more affordable options. Aluminum also has a great strength-to-weight ratio, meaning that it’s quite strong for how light it is. High conductivity is another positive of working with aluminum, which is great for interfering with EMI.


If you’re looking for the best metals to protect against EMI, copper might be the right choice for you. It’s one of the most reliable choices when it comes to shielding. Copper has the useful property of being able to absorb radio waves as well as magnetic waves. It’s quite effective against reducing the effect of these waves and can be quite corrosion resistant when alloyed with other metals like nickel and zinc, commonly known as alloy 770.

Pre-Tin Plated Steel

Another lower-cost option for electromagnetic shielding is to use what’s known as pre-tin plated steel. Its permeability value gives it the ability to protect against more low-frequency EMI when compared to metals like aluminum or copper. While steel is vulnerable to oxidizing, the tin plating on top of it helps to prevent the accumulation of rust. The tin plating also makes this alloy easy to solder during the assembly of the device.

Wieland Diversified wants to be your go-to metal alloy supplier—no matter what your use for our metals may be. We know our customers have diverse needs and we have the resources needed to fulfill whatever you may throw at us.