Neodymium Magnet disk Neodymium Magnet, is the most prominent kind of magnet material in rare earth permanent magnet materials, who is composed of Neodymium alloy, Iron, Boron and trace of other elements, by powdering metallurgy technology. Neodymium magnets are of high remanence, high coercivity and super high energy product, besides it is of good machining capability, that's why Neodymium magnets are being called King of Magnets. Due to poor anti-corrosion on the surface of neodymium magnets, the magnets need to be plated, now you can find Nickel, NiCuNi, Epoxy, Phosphate, Chemical Nickel, Gold etc. platings for customers' choice.