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AlNiCo Magnets

AlNiCo is one of the oldest magnet compounds available. The name is simply derived from the elements used, namely Aluminium (Al), Nickel (Ni) and Cobalt (Co).

AlNiCo alloys make powerful permanent magnets that possess strong magnetic fields. However, they can be demagnetised very easily by placing like poles together. One significant advantage is that alnico can work at the highest operating temperature of any magnet (up to 550oC) and offers good stability when used across a wide magnetic field.

AlNiCo is produced by either a casting or sintering process. Cast AlNiCo magnets are more expensive but are magnetically stronger, with finer tolerances and a more consistent magnetism. Sintered AlNiCo is made from a powdered mixture that is pressed into a die under tons of pressure, sintered in a hydrogen atmosphere.

Sintered AlNiCo magnets in grades from 2 to 8 (MGOe 1.5-4) and Cast AlNiCo in grades from 5 to 8 (MGOe 5.3-7.5). The range includes blocks and rods including those for making guitar rods and amplifier pick ups. Note: Alcomax 3 is another name for AlNiCo 5.

At Guy’s Magnets, we only stock cast AlNiCo.