NDFEB PERMANENT
  HARD FERRITE MAGNET
  ALNICO
  SMCO

ALNICO
 Alnico material can be the foundry or sinter type. Foundry has a high capability and sinter is easy to machine into various forms. Alnico can work at 400≧ and has a high rust-resistance, but does not use coating. This kind of magnet is mainly used in instruments and products that operate at stable temperatures.