https://www.rishengmagnets.com/products/smco-magnets.html SmCo magnets (also called Samarium Cobalt magnets) are consist of Sm (samarium), Co (cobalt), and other elements like Hf(hafnium) or Zr(zirconium), they are part of the permanent rare earth magnet family, there are two main types, the composition of SmCo5 magnet is samarium 37% and cobalt 63%, while Sm2Co17 magnet is: samarium 25%, copper 5%, iron 18%, hafnium or zirconium 2%. As a reputable SmCo magnet pricesmco magnet factory in China, RiSheng has various high-quality SmCo magnets for sale, all at affordable prices. The advantages of SmCo magnets supplied by our company are strong magnetic strength, high-temperature resistance, and reliable performance against corrosion. Our Samarium Cobalt magnets can keep their magnetic properties in very high-temperature conditions, the maximum working temperature of SmCo5 is 250℃, while Sm2Co17 is 350℃.