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Alnico magnets offer the best temperature characteristics of any standard production magnet material available. Alnico magnets can be used for continuous duty applications where temperature extremes up to 930°F (500°C) can be expected. Temperatures above 1000°F will result in permanent metallurgical changes which can only be recovered by reheat treating. Excursions to lower temperatures pose less of a problem for most Alnico applications; however, each individual circuit should be examined carefully to determine the effects which may occur as a result of operating at those extremes. A Dura team member can provide specific guidelines concerning the temperature characteristics for a given Alnico grade magnet and make recommendations for their proper use.

Please refer to the Available Alnico Magnet Grades section of our website for specific thermal performance.

Technical Articles:

Why Magnets Lose Strength: The Effects of Volume Loss, Geometry, Elevated Temperature, and Demagnetization from External Fields