Alnico magnets are made from aluminum, nickel, cobalt, iron and a few other elements, such as copper, titanium, and sulfur. Alnico magnets are relatively easily demagnetized, but resisting oxidation well. Energy product ranges from 1.0MGOe to about 9.0MGOe. Alnico magnets have been popular since the 1930s. Most alnico magnets are manufactured using typical foundry casting techniques, where the molten alloy is poured into sand molds. Very small magnets, usually one ounce or less, are also produced using the press and sinter techniques. Cast Alnico magnets can be made into complex shapes, such as horseshoes, which may not be possible with other materials. Sintered Alnico magnets offer slightly lower magnetic properties but better mechanical characteristics than cast Alnico magnets. Alnico magnets are widely used in instruments, meters, speakers, separators, magnetos, sensor, microwave device, automatic control appliance, aviation, spaceflight, military technology, etc. For more in