Alnico Block Magnets

Alnico block magnets get their name from an acronym of aluminium (Al), nickel (Ni), and cobalt (Co), the main elements used in the alloy. Frequently used in industrial applications such as electric motors, sensors, meters and rotating machinery, alnico is a strong and incredibly versatile type of permanent magnet.

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Although not as strong as rare-earth magnets like neodymium, alnico block magnets can be used in magnetic circuits to generate relatively strong magnetic fields. After their development in the 1930s, alnico magnets held the spot as the strongest commercially available magnet until the 70s, when they were largely displaced by samarium magnets.

Despite the introduction of stronger magnets, alnico’s incredible temperature stability and impressive resistance to corrosion make it a valuable material to this day. In fact, alnico has the highest operating temperature of any magnetic material. With a Curie temperature of 800°C and a maximum working temperature of 550°C, alnico block magnets are essential for applications involving extreme heat.

Alnico block magnets are incredibly versatile, and can be easily demagnetised and re-magnetised to suit different purposes. Unlike hard ferrite magnets, alnico magnets are also electrically conductive. The strongest types of alnico block magnets are anisotropic, which can only be magnetised in a single direction. Isotropic alnico magnets, although weaker, offer more versatility as they can be magnetised in any direction.

We have a small selection of alnico block magnets available online, as well as hundreds of more options if you contact us directly. Whatever your project or industry, we’re sure to have a magnetic solution to suit. If you need something outside of our standard range, don’t worry – we also offer custom-made alnico magnets, engineered to your specifications.

Not sure what type of alnico magnet you need? Get in touch today – we offer free expert advice to all our customers, so you can be confident you’re getting the right solution for your project. Simply give us a call on +44 (0) 1793 425600 to talk to one of our expert advisors, or email your query to

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