Magnets Can Withstand High Temperatures
Magnets That Can Withstand High Temperatures
Let’s take a look at several strong magnets that can tolerate high temperatures. You can check the table below to find their corresponding maximum operating temperatures and Curie temperatures.
Table 1 Maximum Operating Temperatures and Curie Temperatures
| Maximum Operating Temperature/℃ | Curie Temperature/℃ | |
| Al-Ni-Co Magnet | 525 | 800 |
| Ferrite Magnet | 250 | 450 |
| Sm-Co Magnet | 310-400 | 700-800 |
| Nd-Fe-B Magnet | M (80-100), H (100-120), SH (120-150), UH (150-180), EH (180-200). | 310-400 |
1. Al-Ni-Co Magnet – 525℃
Al-Ni-Co magnets are composed of aluminum, nickel, cobalt, and iron, and these magnets possess the highest maximum operating temperature of 525℃. Thus, they are suitable for extremely high-temperature workplaces. Additionally, Al-Ni-Co magnets appeared in the market quite early. They were commercially available in the 1960s and got replaced by rare earth magnets in the 1980s. Yet, these tough magnets are still commonly used to make sensors, guitar pickups, and other high-temperature handling equipment.
Related reading: What Is an Alnico Magnet & What Is Alnico Magnet Used for?
2. Ferrite/Ceramic Magnet – 250℃
Ferrite magnets contain a large amount of iron oxide and a small proportion of other metallic elements. Although ferrite magnets come with a relatively lower maximum operating temperature of 250℃, they are widely used because of their lower cost. They are also called ceramic magnets due to the extremely high electrical resistance. With these desirable features, ferrite magnets find various applications, such as transformers, computer cables, and so on.
3. Sm-Co Magnet – 310~400℃
Sm-Co magnets come with strong magnetic power and a maximum operating temperature ranging from 310 to 400℃. Although they are less strong than neodymium magnets, Sm-Co magnets have higher temperature ratings, making them suitable for applications involving high or extremely low temperatures. Besides, these magnets have notable properties like good oxidation resistance, corrosion resistance, and extreme demagnetization resistance.
Stanford Magnets has rich experience and advanced technology in the manufacturing and supplying of samarium cobalt magnets. There are mainly two types of Sm-Co magnets (series 1:5 and series 2:17) available on our website. Send us an inquiry if you are interested.
4. Nd-Fe-B Magnet – 80~200℃
Nd-Fe-B magnets, or neodymium magnets, is the most commercially available magnet and their working temperature can reach up to 200 degrees Celsius.
It is the most commercially available magnet and its working temperature can reach up to 200 degrees Celsius.
Neodymium magnet is classified by temperature as M (80-100 ℃), H (100-120 ℃), SH (120-150 ℃), UH (150-180 ℃), EH (180-200 ℃).