Meanwhile, it has a very low-temperature coefficient (-0.03%/°C) and can be used at both high and low temperatures. The maximum operating temperature is 350°C, and the negative temperature is about minus 200°C. At the same time, it has strong corrosion resistance and oxidation resistance. Therefore, SmCo magnetic steel usually does not need to be electroplated and is widely used in motors, meters, sensors, engines, radar, and other high-tech fields.