Samarium Cobalt Magnets

With over 30 years of expertise in magnetic technologies, NGYC specializes in the design, engineering and manufacturing of SmCo magnets for high-performance applications ranging from electric motors, car speakers to traction motors, rotation angle sensors and MRI equipment. Offering improved resistance to corrosion thanks to their alloy properties, the Samarium Cobalt magnets are available in a range of shapes and sizes, which are block magnets, disc magnets, rod magnets, ring magnets, etc.

Other Magnetic Materials

NGYC stands as an experienced manufacturer in the magnetic materials industry, offering comprehensive, one-stop solutions that span from design and R&D all the way to mass production. In addition to Samarium Cobalt magnets, we also provide a variety of magnet assemblies, injection-molded components, and soft magnetic materials, among others.

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Q&A
You can compare your specifications with the information on our website to find the right magnetic properties or grade. Our "General Dimensions and Shapes" page can help you determine the product size you need. For more information, please click on "Technical Support."
No, each magnet is typically customized to meet the needs of our customers. We can assist you in designing the approximate size based on the product's application. Please refer to our "Standard Sizes and Shapes" page for the range of sizes we can manufacture.
Since all of our products are customized, normally we do not keep extras in stock. Therefore, we may need to make new samples when customers request them, which incurs additional costs. We may provide free samples only if we happen to have the product in stock.
  • The notation of the grade is different: SmCo5 is generally represented by YX, while Sm2Co17 is represented by YXG.
  • The composition is different: SmCo5 is mainly composed of samarium, cobalt, and praseodymium, or pure samarium cobalt without praseodymium. Sm2Co17 is mainly composed of samarium, cobalt, copper, iron, and zirconium.
  • The physical properties are different: SmCo5's maximum working temperature is 250℃, while Sm2Co17's maximum working temperature is 350-500℃. SmCo5 has better mechanical and physical properties and is easier to produce, while Sm2Co17 is more brittle.

The physical properties of samarium cobalt magnets make them brittle and prone to chipping or breaking under force. The production of one magnet involves more than ten processes, and small chips or breaks can occur during processing, inspection, transportation, or use. Therefore, we recommend that you handle and protect the magnets with great care throughout these processes. Nevertheless, small chips or breaks may still occur.

Yes, samarium cobalt magnets contain iron and can rust. However, compared to NdFeB magnets, the iron content in samarium cobalt magnets is lower, so rusting is not as severe. If the magnet is used in seawater, some rust spots may appear on the surface, but this does not affect its performance or usage.

Samarium Cobalt magnets have good corrosion resistance, so they generally do not need to be plated. However, some customers may require plating for cosmetic purposes or if the application environment is harsh. We can provide a variety of plating types, including zinc, nickel, silver, copper, chemical nickel, nickel-copper-nickel, nickel-gold, nickel-tin, epoxy, and more.

The price of SmCo5 is higher than Sm2Co17 because SmCo5 contains more cobalt, and cobalt is a rare metal, making it very expensive. Therefore, although the magnetic energy product of SmCo5 is lower than that of Sm2Co17, the price is higher.

Currently, the highest performance samarium cobalt magnet that we can produce is YXG-35, with the following specifications: Br = 11,600-12,000Gs; bHc = 10,900-11,400Oe; iHc ≥ 18,000Oe; (BH)max = 32-35MGOe.

We offer a wide range of permanent magnet materials to meet the diverse needs of our customers. Our offerings include Samarium Cobalt (SmCo) magnets, Neodymium Iron Boron (NdFeB) magnets, Ferrite magnets, Alnico magnets, injection molded magnets, bonded magnets, and rubber magnets, among others.

Absolutely! Our company has the complete capability to provide magnet assemblies composed of magnets and metal components. With over 600 advanced processing and precision machining equipment, we are equipped to deliver high-quality permanent magnet assemblies and plastic integrated magnets to our customers.

The need for coatings depends on the specific permanent magnet material used. Samarium Cobalt (SmCo) and Alnico magnets are corrosion-resistant and typically do not require additional coatings for enhanced protection. On the other hand, Neodymium Iron Boron (NdFeB) magnets are susceptible to corrosion and are always coated to provide effective corrosion protection. We offer three commonly used coatings for NdFeB magnets:

  • Nickel-Copper-Nickel (maximum temperature of 200°C)
  • Aluminum IVD (maximum temperature of 500°C)
  • Zinc (maximum temperature of 200°C)

The answer depends on the attributes that are important for your specific application. Different materials offer different combinations of performance characteristics. Choosing the right permanent magnet material requires careful consideration and trade-offs. Share with us your specific requirements and application details, and we will recommend the most suitable product for you.

NGYC has obtained TS16949 and ISO9001 certifications for our quality management systems, which reflects our commitment to meeting the highest quality standards in delivering exceptional products and services to our valued customers.