The Difference between Sm2Co17 and SmCo5


Samarium-cobalt (SmCo) magnets are second-generation rare earth permanent magnets, which are mainly classified into 1:5 type (SmCo5) and 2:17 type (Sm2Co17). Its main features are high magnetic (high magnetic energy product, high coercivity and high remanence) and good temperature performance (-0.030%/°C).

The maximum operating temperature is 250-350 degrees Celsius. Compared with neodymium magnet, samarium cobalt magnets are more suitable for working in high temperature environments.


It is suitable for manufacturing various high-performance permanent magnet motors and applications with complex working environments, such as aerospace, national defense industry, microwave equipment, communications, medical equipment, instrumentation, wind power generation, various magnetic transmission devices, sensors, magnetic processors, high-end motors and other industries.

In addition, the samarium-cobalt magnet has a strong rust resistance, and the surface thereof generally does not require plating treatment.