SmCo is made of thulium samarium and transition metal cobalt, iron and copper. It is the second generation of thulium magnet. SmCo has not only high Energy Product （ 14---28MGOe ） and reliable coercive force, but also good temperature trait. Compared to NdFeB magnet, with valu Sm and Co in it. SmCo is suitable to high temperature. Since this material contents more percentage of valuable Sm and Co, the application is therefore not wider than others.