#DSSTYLES MAGNET BLOCKS HOW TO#

Overall, in many applications we come across and are asked about, a steel sheet-metal shield is usually the best solution. However, for applications that involve large, powerful neodymium magnets then the higher saturation points of steel prove useful and serve better. If the magnet being shielded has low field strength, then specially made materials such as MuMetal can provide better shielding than steel.

#DSSTYLES MAGNET BLOCKS HOW TO#

So how to decide which material is right for your specific shielding problem? The higher the number, the better the shield.įor example, low carbon steels have a permeability of 1000-3000, whereas specially designed metals can be as high as 300,000-400,00. When it comes to shielding the relative permeability is a measure of a material’s ability to absorb magnetic flux. Permeability is the degree of magnetisation of a material responding linearly to an applied magnetic field. These specialised magnetic shielding materials will have a higher relative permeability but a lower saturation point. Most of these will have a high nickel content, with either 50% or 80% nickel content.

The most common of these specialised materials is MuMetal or some other proprietary alloys. There are some specialised materials designed and made for magnetic shielding. Are There Other Materials That Can Be Used? In some cases where saturation becomes an issue, multiple layers of materials can be used.

However, after a certain point adding steel thickness will not improve the shielding. The thickness of your shield is important as if the shield is too thin it can become saturated and will not be able to hold any more lines of flux, so therefore you need the shield to be thick enough to hold as much flux as possible. The magnetic field will be affected by the thickness of the metal being used to shield it, however, figuring out how thick the shield needs to be is dependent on several factors.įor example, you must consider the size of the magnetic field you are shielding, what is being shielded from, what the shields shape and finally does it make sense to shield the magnet. Steel is the most commonly used metal because it is cost-effective and widely available, however, some stainless steels are not ferromagnetic. Many steels are ferromagnetic metals and will work for redirecting magnetic shields.

That is any metal containing iron, nickel or cobalt.

Dsstyles magnet blocks