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NINGBO SOUWEST MAGNETECH DEVELOPMENT CO.,LTD.
NINGBO SOUWEST MAGNETECH DEVELOPMENT CO.,LTD.

Samarium Cobalt Magnets

Samarium cobalt magnets (also known as SmCo magnets): one of the two types of rare earth magnets is a strong permanent magnet made of an alloy of samarium and cobalt. They were developed in the early 1970s. They are generally the second-strongest type of magnet made, less strong than neodymium magnets, but have higher temperature ratings. They are expensive, brittle, and prone to cracking and chipping. Samarium-cobalt magnets have maximum energy products (BHmax) that range from 16 megagauss-oersteds (MGOe) to 32 MGOe; their theoretical limit is 34 MGOe. They are available in two ''series'', namely Series 1:5 and Series 2:17.


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  • souwest magnetech samarium cobalt ring magnets
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Samarium Cobalt Magnets Features & Characteristics

Samarium Cobalt Magnets Features & Characteristics

Samarium Cobalt Magnets (SmCo) magnets feature excellent temperature stability while retaining their magnetic properties under extreme temperature conditions. Thus, they are very suitable for applications involving high or extremely low temperatures.


SmCo magnets have high coercivity (Hci) to resist demagnetization.


SmCo magnets have good corrosion resistance. Sm1Co5 does not rust because it does not contain iron. However, Sm2Co17 should be coated with a protective coating in very wet conditions to minimize the risk of surface corrosion. However, Sm1Co5 does not rust because it does not contain iron.

What Are The Differences Between Smco Magnets and Ndfeb Magnets?

  • Temperature Resistance
    Temperature Resistance

    SMCO magnets can be used at a higher temperature than NdFeB magnets, up to 300 degrees Celsius or more.

  • Higher Performance
    Higher Performance

    Above 180 degrees Celsius, SmCo magnets start to provide higher performance than NdFeB magnets.

  • Corrosion Resistance
    Corrosion Resistance

    Samarium Cobalt has good corrosion resistance and generally does not require surface treatment, while NdFeB is easy to be corroded.

  • Price Comparisons
    Price Comparisons

    The general price of samarium cobalt magnets is higher than NdFeB magnets.

  • Comparisons
    Comparisons

    Among all magnets, samarium cobalt magnets are the most brittle one.

Magnetic Performance Table of Sintered Samarium Cobalt Magnet


Magnetic Performance Table of Sintered Samarium Cobalt Magnet



Different Shapes of Samarium Cobalt Magnets

  • Samarium Cobalt Disc Magnet
    Samarium Cobalt Disc Magnet

    Corrosion-resistant round, cylindrical samarium cobalt magnets.

  • Samarium Cobalt Ring Magnet
    Samarium Cobalt Ring Magnet

    Circular shaped samarium cobalt magnets for a variety of applications.

  • Smco Rectangular Magnet
    Smco Rectangular Magnet

    Highly powerful block and square shaped samarium cobalt magnets.

FAQs About Samarium Cobalt Magnets

  • What About Temperature Considerations for Samarium Cobalt Magnets?

    The maximum operating temperature of SmCo magnets is between 250 and 550°C and they have a Curie temperature range of 700 to 800°C.

  • What are the Common Applications of SmCo Magnets?

    SmCo magnets are widely used in the military, wind energy, semiconductor, petroleum, manufacturing, aerospace, medical, automotive, electric power, and energy industries, such as high-performance motors, generators, turbo machinery, electric motors, magnetic separation devices, sensor systems, wind turbine equipment, medical devices, magnetic drive components and more.


  • What about the Surface treatment of SmCo Magnets?

    SmCo Magnets do not need surface treatment because of their excellent corrosion resistance. Besides, Sintered Samarium Cobalt Magnets have a high demagnetization resistance.


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Applications of Samarium Cobalt Magnets