Manufactured by traditional foundry methods, Alnico magnets are produced from complex alloys of Aluminium, Nickel, Cobalt, Copper and Iron.
Although newer generations of permanent magnet materials have higher energy levels, Alnico magnets still offer the best temperature stability of any available magnetic material, which together with its high magnetic flux density, ensures that Alnico remains the material of choice for many applications.
Sintered Alnico are made with a powdered metal process. Lower grades are isotropic, which can be magnetized in any direction. The powder metal version of Alnico allows for easier integration of features since a tool is used and the magnet is finished to near net shape.
Cast Alnico magnets are cast in sand moulds and usually require finish grinding. Casting Alnico is the most typical manufacturing method and most cast Alncio is “orientated” and anisotropic. This means that the magnet can only be magnetized in one direction, but this improves the magnetic strength