Alnico Magnets

Aluminium Nickel Cobalt

Alnico is the first type of alloyed magnetic material and the oldest member of the magnet family. First developed in the early 1940's it is made by mixing aluminium, nickel and cobalt with iron and is particularly suitable for temperature sensitive applications.

Because of its excellent linear temperature characteristics, high magnetic flux density and good corrosion resistance, it is used for products of all sizes, from tiny cellular telephone magnets, weighing less than one gram, to radar focusing magnets weighing twenty kilograms or more.

Uses include

• Automotive and electronic sensors
• Magnetron
• TWT amplifiers
• Actuators
• Motors
• Reed switches
• Hall effect sensors
• Communication

About the product

• Chemical composition AlNiFeCo.
• Produced by powder metallurgical process or casting.
• Readily available in very large range of sizes.
• Very hard and brittle but can be cut, drilled and machined with simple cutting tools.
• Comparatively poor resistance to demagnetisation.
• High magnetic flux density.
• Good resistance to corrosion.
• Superior temperature stability over wide range.