Alnico permanent magnets are the oldest magnetic material in the world very famous because of the best working
temperaturecoefficientand high remanence (Br) , but Coercivity(Hcb)is very low , it is easy demagnetized ,so you should take care about packing way and can not let other strong magnets near them after they are magnetized. According
to different process, there are sintered alnico and cast alnico. Sintered alnico can make into small size with better tolerance y cutting and machine way, but lower properties than cast alnico’s. Cast alnico can be made into many kind of shape by
casting.