1 . Features: Ssamarium Cobalt Permanent Magnet is one of rare earth magnets. Main grades of SmCo are SmCo5 and ly divided into the SmCo5 and Sm2Co17. Compared with NdFeB, SmCo magnet has a stronger anti-corrosion and higher temperature resistant ability, but it has a lower magnetic energy product than NdFeB. SmCo is brittler than NdFeB.