China Neodymium And Ferrite Magnets Manufacturer & Supplier 
Samarium cobalt magnets are a type of high-performance rare earth permanent magnet material that are widely used in high-end fields such as aerospace, military, automotive, and nuclear industries due to their excellent high-temperature resistance and magnetic stability. Compared to common neodymium iron boron magnets, samarium cobalt magnets are more stable in high-temperature environments and have a natural advantage in terms of temperature resistance. The upper limit of the operating temperature for standard samarium-cobalt magnets typically ranges between 250°C and 350°C. However, the Curie temperature of samarium-cobalt material itself exceeds 700°C. By optimizing the formulation and manufacturing processes, it is possible to custom-produce samarium-cobalt magnet products with temperature resistance as high as 500°C or even higher, meeting the demands of extreme operating conditions.
Samarium cobalt disc magnet with holes in the middle, no coating protection required.
High-temperature smco magnets are able to withstand temperatures of up to 500°C primarily due to their stable crystal structure and excellent oxidation resistance. Unlike neodymium-iron-boron magnets, samarium-cobalt magnets are less prone to demagnetization at high temperatures, making them particularly suitable for use in high-temperature, long-term operation applications such as motors, sensors, aviation turbines, and oil drilling instruments. Additionally, while maintaining stable magnetic properties at high temperatures, they also exhibit good mechanical properties, with minimal risk of fracture or powdering.
Currently, many professional magnetic material manufacturers both domestically and internationally can customize samarium-cobalt magnets with a temperature resistance of 500°C according to customers' specific application scenarios, including directional sintering, dimensional processing, magnetic property adjustment, and surface corrosion protection treatment. Although high-temperature samarium-cobalt magnets have relatively high costs, their irreplaceability in extreme environments makes them the preferred magnetic material solution for high-reliability engineering systems.
The above is an introduction about the temperature limit of samarium cobalt magnets exceeding 350 ℃. We hope it will be helpful for you to understand the temperature resistance of magnets!
Related smco magnet knowledge expansion;
SmCo Permanent Magnets (History/Use/Properties/Advantages/)