Alnico magnets basically consist of aluminum, nickel, cobalt, iron and titanium. The ALNICO magnets are formed by casting or powder metallurgical processes. The casting process type Alnico magnets have better magnetic properties compare with powder metallurgical process type. But the manufacturing process of powder metallurgical processed Alnico magnets is simply. 

Alnico remains the workhorse of the permanent magnet industry and can be relied upon to deliver impressive flux density at an economical price. Alnico also boasts the lowest temperature coefficient of any commercial magnet material (.02% per degree centigrade) allowing for excellent stability over a wide temperature range. The maximum working temperature can be as high as 400℃ for this magnets.

The coercive force of Alnico magnets is very low, so it can be easily effected by reverse magnetics force, impact or touched by iron. This means that they can be easily demagnetized by external influences. For this reason, Alnico magnets should be stored and packed with the samples poles opposing each other. In open circuit, the ration of length/diameter (L/D) should be at least 4:1, with shorter length, Alnico magnets are unstable in open circuit. Alnico magnets have good corrosion resistance characteristic, no coating is needed for surface protection.

Alnico has experienced renewed interest in recent years in such temperature-sensitive applications as hall-effect and MR-based automotive and electronic sensors, in addition to the traditional magnetron, TWT amplifiers, actuators, motors and instruments applications that have long relied upon Alnico.