Samarium cobalt (SmCo) disc magnets offer outstanding performance in extreme environments — delivering strong magnetic force at temperatures up to 350 °C, exceptional resistance to corrosion and chemical attack without surface coating, and superior resistance to demagnetisation from external fields. These properties make SmCo disc magnets the preferred choice for aerospace, defence, downhole oil and gas, high-temperature motors, and precision scientific instrumentation. While more expensive than neodymium, SmCo's reliability in harsh conditions makes it the only viable option for many critical applications.
