Heat-resistant magnet systems
Heat-resistant magnets made of samarium cobalt (SmCo) or AlNiCo are designed for very high ambient temperatures. Like all magnet systems, they can be equipped with either a thread or a borehole. This allows for quick and easy installation. Our high-temperature magnets are available in many sizes and can also be delivered in large quantities.
Depending on the magnet core, different maximum temperatures can be achieved. A samarium cobalt magnet system is temperature-resistant from 200°C to 350°C, depending on the design. AlNiCo magnet systems can even withstand temperatures of up to 450°C!
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Heat-resistant magnets: Samarium-Cobalt or AlNiCo?
High-temperature magnets are available with two different magnetic cores. Samarium-Cobalt (SmCo) is very strong and resistant to temperatures between 200°C and 350°C – depending on the steel cup used. Only neodymium magnets are stronger than SamCo magnets in terms of holding power. Furthermore, samarium-cobalt is difficult to demagnetize and is highly resistant to corrosion. A major disadvantage of SamCo is the cost-intensive production, since samarium-cobalt belongs to the rare earths.
Alnico magnet systems are the frontrunners when it comes to temperature resistance. These heat-resistant magnets can withstand temperatures of up to 450°C. Just like SamCo magnets, AlNiCo magnets are also highly corrosion-resistant and resistant to most acids, oils and solvents. However, they are very hard and brittle in nature. They can only be processed by grinding.
In summary, the choice of the right high-temperature magnet depends on the factors of the application. If high holding forces are needed at temperatures up to 350°C, samarium cobalt magnet systems are suitable. At higher ambient temperatures or when certain acids and oils are used, it is better to use AlNiCo magnet systems.
Since every application is unique, it makes sense to seek advice before purchasing these heat-resistant magnets. Our sales engineers and magnet experts will be happy to advise you!
High temperature magnets and their applications
Temperature-resistant magnet systems have become indispensable in many sectors due to their properties. Since both SamCo and AlNiCo magnets are highly corrosion resistant and, in the case of AlNiCo, can also withstand most acids and oils, they are particularly suitable for sensors, measuring devices and motors.
As the name suggests, heat-resistant magnets are particularly useful in applications involving extreme operating temperatures. These are mainly found in the industrial sector, for example in painting and powder coating plants, drying ovens and in welding applications, hot castings or torch-cut pieces.
When using heat-resistant magnets, it should be noted that the screws must also be temperature-resistant. When installing magnetic systems that are temperature-resistant, we recommend brass or steel screws.