... from neodymium ,iron, and boron. It is the ideal magnetic material in the world till now and have been used universally ... high working temperature, as high as 200 centigrade1. Rare Earth neodymium permanent magnets grades of N35,N38,N40,N42,N45,N48,N50,N52 ... ,silver, Cu and so on (as per the requirements).5. Rare earth magnethas super strong magnetic force and high intrinsic coercive force ...