Alnico Magnets

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Alnico Magnets - Overview

Alnico permanent magnets are very strong, but have a relatively small resistance against demagnetization. Alnico magnets have the best temperature coefficients of any magnet material. They do not need to be coated.Alnico magnets are a best choice in extremely high temperature applications. 

Alnico Magnets - Performance

Advantages of Alnico Magnets

  • Cast alnico can be produced to complex shapes with complex magnetic patterns.
  • Can be used up to 500-550 degrees C (932-1022F).
  • Least variation in magnetic output with temperature change of any magnetic material.
  • Can be cast in very large sizes.

Typical Applications for Alnico Magnets

  •  Very high temperature applications
  •  Use in hot oils
  • Guitar pickups
  • Cow magnets
  • Separators
  • Clamping
  • Motors and Generators
  • Mass spectrometers
  • Precision sensors and meters
  • Aerospace


  • Alnico magnets are very hard and brittle and can be broken unless carefully handled.
  • Alnico magnets are easily demagnetized - even when exposed to repelling magnetic fields - such as when two similar Alnico magnets are placed in repulsion.
  • Cast Alnico materials commonly contain casting voids and hairline cracks within the material. Finish machining can expose these voids and hairline cracks. 
Alnico Rectangular Magnet
Alnico Disk Magnet
Alnico Rod Magnet
Alnico Ring Magnet
Alnico Arc Magnet
Educational Magnets