... .custom ring,cylinder,disc,block,tile,ball... 4.sta Neodymium magnets are mainly made from neodymium ,iron, and boron. It is ... working temperature, as high as 200 centigrade1. Rare Earth neodymium permanent magnets grades of N35,N38,N40,N42,N45,N48,N50,N52 ... ,UH,EH) etc.2. Working temperature for Rare Earth NdFeB Magnets: from 80 centigrades to 200 centigrades.3. Can be magnetized ...