Samarium Cobalt Disc Magnets

Product Information 

SmCo magnets (Samarium Cobalt) have also a very strong magnetic field. They tend to resist demagnetization extremely well. Unlike Neodymium magnets, it is also very corrosion resistant. SmCo magnets can operate at higher temperatures up to 300°C and are widely used in applications in which higher operating temperature and higher corrosion and oxidation resistance are crucial. The temperature coefficient of remanence is usually less than ±0.05%. Two common compositions of SmCo magnets are SmCo5 and Sm 2Co17. They can be sintered and bonded. Generally, the cost of SmCo magnets is higher than NdFeB magnets. But NdFeB magnets are stronger than SmCo magnets.

Sm-Co materials come in energy products from 16 MGOe up to 33 MGOe. Their high resistance to demagnetizing influences and excellent thermal stability has ensured Sm-Co as the premium choice for the most demanding motor applications. In addition, the corrosion resistance is significantly higher than, for example, Nd-Fe-B. It is still recommended to coat the magnet in acidic conditions. Its corrosion resistance has also offered a high degree of comfort to those looking to use magnets in medical applications.

Samarium Cobalt Disc Magnets Synonyms

Cobalt-samarium, SmCo, Samarium-cobalt alloy 18, Samarium-cobalt alloy 24, Samarium-cobalt alloy 30, Sm2Co17, SmCo5, 12052-78-7

Samarium Cobalt Disc Magnets Specification

Standard Dimensional Tolerances for SmCo Disc Magnets

Standard diameter tolerances for Rare Earth Magnets (SmCo & NdFeB) based on the following dimensions:

+/- 0.004” on dimensions ranging from 0.040” to 1.000”.

+/- 0.008” on dimensions ranging from 1.001” to 2.000”.

+/- 0.012” on dimensions ranging from 2.001” to 3.000”.

*Tolerance on thickness is +/-0.004” regardless of size.

Per your request or drawing

We can customized as required

Properties（Theoretical）

SmCo Magnet Approximate Pull Info

Coatings, rust, rough surfaces, and certain environmental conditions can significantly reduce the pull force. Please be sure to test the actual pull in your actual application. For critical applications, it is suggested that the pull be de-rated by a factor of 2 or more, depending on the severity of a potential failure.

Safety Precautions for Samarium Cobalt Magnets

SmCo magnets are hard, very brittle and high in magnetic strength. They can also snap together with great force, and chip or break if dropped. Therefore, they require careful handling and packing in order to prevent injuries or damages to the magnets.

Material Information

· An alloy compose of SmCo5/ Sm2Co17 produce by powder metallurgical method

· Extremely hard & brittle

· High demagnetization resistance

· Excellent anti-corrosion properties

· More expensive than NdFeB magnets because of limited raw material supply

· Outstanding thermal stability

Applications of Samarium Cobalt Disc Magnets

Samarium Cobalt (SmCo) magnets have excellent temperature stability while maintaining their magnetic properties in extreme temperature conditions. They are well suited for technical applications where high-performance and magnetic strength is required in very low or high temperatures. SmCo magnets are widely used in the automotive, aerospace, medical, military, industrial manufacturing, semiconductor, wind, power, oil and energy industry.

Common applications for SmCo magnets include:

- High Performance Motors

- Actuators

- Generators

- Turbo Machinery

- Electric Motors

- Magnetic Separation Devices

- Traveling Wave Tubes

- Magnetic Couplings

- Magnetic Bearings

- Sensor Systems

- Drilling Equipment

- Wind Turbine Equipment

Packing of Samarium Cobalt Disc Magnets

Standard Packing:

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 440 gallon liquid totes Special package is available on request.

ATTs’ Samarium Cobalt Disc Magnets are carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.

Chemical Identifiers