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Distinctive properties - Permanent solutions - Versatile applications

General Considerations :

  • Thermal treatment : Casting and sintering processes are often followed by heat treatment to improve the magnetic properties of Alnico magnets.

  • Machining : After casting or sintering, Alnico magnets can undergo machining processes to obtain precise dimensions and tolerances.

  • Surface finishing : Alnico magnets are often coated or plated with materials like nickel to protect them from corrosion.

Differences in production methods

The production of Alnico magnets usually involves a casting or sintering process. Both methods result in the formation of a dense and magnetically powerful material, but have different characteristics.

1. Cast Alnico magnet

  • Casting allows the production of complex shapes and sizes.

  • The resulting magnets have a smooth surface finish.

  • This method works well for small to medium sized magnets with complex designs.


2. Sintered Alnico magnet

  • Sintered Alnico magnets have a higher density compared to cast magnets.

  • This method is suitable for producing larger magnets with simpler shapes.

  • The surface finish may be rougher compared to cast magnets.

Overview of the two main methods of producing Alnico magnets:

Electric Motors - Cast Alnico Magnets - Grade Alnico 8

Electric motors - cast Alnico magnets - Alnico grade 8

Security Systems - Cast Alnico Magnets - Grade Alnico 6

Safety Systems - Cast Alnico Magnets - Alnico Grade 6

Actuators - Cast Alnico Magnet - Grade Alnico 8

Actuators - Cast Alnico Magnet - Alnico Grade 8

Sensors - Sintered Alnico Magnets – Grade Alnico 5

Sensors - Alnico Sintered Magnets – Alnico Grade 5

Controls - Cast Alnico Magnets - Grade Alnico 7

Controls - Cast Alnico Magnets - Alnico Grade 7

Separators - Sintered Alnico Magnets – Grade Alnico 2

Separators - Sintered Alnico Magnets – Alnico Grade 2

ALNICO magnets catalog

Click this link to download the full version.

  1. Further qualities or grade on low thermal coefficient magnets, please contact us for more details. 

  2. The maximum operating temperature depends on the magnet's dimensions and its final applications. We recommend keeping a margin of safety in materials selection.

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