The main raw materials for SmCo-magnets are samarium (~25% - 35%), small quantities of chrome and copper, and the remainder being cobalt. SmCo-magnets are manufactured primarily using presses and sinters. The finished magnet is very hard and can be further processed only by using diamond tools or the erosion process. SmCo-magnets are characterised by excellent resistance to corrosion and can be used at temperatures of up to +250°C.