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Alnico Bar Magnets

Alnico bar magnets offer excellent temperature stability, high residual induction, and relatively high energies.

alnico bar magnets

• Temperature stability in high thigh-temperature applications, and a maximum working temperature of approximately 1000°F

• Alnico bar magnets may be ground to size but not by conventional machining. We can grind them to your specifications.

• Alnico bar magnets have high residual induction and energy product compared to ceramic magnets, and low coercive force compared to ceramic and rare earth materials (more subject to demagnetization).

Alnico is hard and brittle (45-55 Rockwell C), and is not suitable for drilling, tapping or conventional machining operations. Close tolerances are attained by abrasive grinding and cutting. AOMAG provides in-house cutting and grinding to meet your application requirements.

Alnico has the best temperature coefficient of any but the most advanced commercial magnet material, providing for excellent stability over a wide temperature range. A properly designed circuit using alnico magnets will have a stable flux output during temperature fluctuations. Although Alnico displays considerable residual induction it conversely exhibits among the lowest coercivity of any magnetic material. A consequence of low coercivity is sensitivity to demagnetizing effects caused by external magnetic fields, shock, and application temperatures. For critical applications, Alnico magnets can be magnetically stabilized to minimize these effects. Alnico magnets can be partially demagnetized if like poles of magnets are brought together. Placing individual magnets in contact with ferrous materials can also partially demagnetize them. Care must be taken in handling magnetized magnets. Typical open circuit Alnico 5 applications require a long magnetic length to pole surface ratio (usually 4:1 or greater) to ensure good magnetic performance. Check with AOMAG’ technical staff to confirm best ratio for your application.

Company: Fuzhou AOMAG Magnetics Co.,Ltd.
Add: Jinshan Industrial Zone, Cangshan, Fuzhou, P.R,China
Tel: 86-0591-86397993    Fax: 86-0591-86399173
Mail:     Skype: Danielle.omagnet
AOMAG Magnetics is a professional manufacturer and exporter of permanent magnet (NdFeB, Alnico, Smco & Ferrite) and Magnetic Assemblies in China since 1996. AOMAG Magnetics, the leading magnet brand in China. Our annual production capacity is 8000 tons. We own a complete production chain and perfect quality assurance system. We are an IATF 16949:2016, ISO 14001:2015 & ISO 45001:2018 certified company. 
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