Samarium Cobalt is manufactured in two compositions: Sm1Co5 and Sm2Co17, often referred to as the SmCo1:5 or SmCo 2:17 types. 2:17 types, with higher Hci values, offer greater inherent stability than the 1:5 types. SmCo magnets withstand higher temperatures than do NdFeB magnets. It can operate at temperatures up to 350 degrees Centigrade. Sm2Co17 materials exhibit superior temperature characteristics as compared to the Sm1Co5 types. SmCo materials are very brittle, and great care must be taken in machining them. And the corrosion resistance of SmCo is considered “good”, so they are widely used in motors, meter, engine, sensor, radar and other high-tech fields.
