Alnico Magnets has very good resistance to corrosion and high max working temperature, can reach 550deg.C. They are widely use in high stability fields as military, aerospace, automobiles, and security system etc.Even if other materials offer higher energy and coercivity values, the huge remanence and thermal stability of Alnico magnets 

make it the ideal cost-effective material for certain applications.Though alnico magnets have largely been replaced by stronger neodymium magnets like NdFeB magnets and Smco magnets they are still widely used in the manufacturing of sensors, guitar pickups, loudspeakers, and many other everyday household objects.