Heat Resistant Magnets
Standard Neodymium Magnets can withstand temperatures of up to 80 °C. When exposed to temperatures beyond this threshold, even for a short time, their magnetic properties will be altered and weakened. Depending on the intensity of the heat and the duration, this damage may be permanent and irreversible.
For this reason, we highly recommend to choose a high-temperature-tolerance Neodymium magnet, or to switch to Ferrite, SmCo or Alnico magnets when faced with high heat applications.
If you have any doubt just contact our technical team by Phone, E-mail or on the Chat (Monday to Friday 8-12.30 / 13.30-17.00).
Which are the best Heat Resistant Magnets?
Overall, Alnico Magnets offer the highest temperature resistance among permanent magnets, up to 650 °C without incurring in any loss of performance. The only downside is their relatively low attraction force, which is quite lower than Neodymium.
SmCo Magnets offer an interesting balance between heat resistance and attraction force. In fact, they are only slightly weaker than common Neodymium magnets, while boasting an excellent corrosion resistance and a max temperature of 350 °C.
Lastly, Ferrite Magnets are a good alternative at a more competitive price, being very resistant to corrosion, humidity and oxidation. They can withstand temperatures up to 250 °C.
Neodymium Magnets are the most susceptible to high temperatures and can be easily damaged. The standard threshold is up to 80 °C. It is indeed possible to manufacture them with specific treatments to increase their resistance. These are indicated by a letter in the name, after their grade: an “H” magnet is made to operate at temperatures of up to 120 °C, “SH” up to 150 °C, “UH” up to 180 °C, “EH” up to 200 °C.
You can read our dedicated articles:
Magnets, Heat Exposure and Demagnetization
Permanent Magnets and Heat Resistance: the best magnets to use
If you don’t find the right product or size, or if you need a custom made one, contact us by mail or phone !