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SmCo Magnets Sintered SmCo magnet Bonded SmCo magnet Injection bonded SmCo magnet

General Description for SmCo Magnets

As part of the rare earth group of permanent magnets, Samarium Cobalt (SmCo) magnets typically fall into two families of materials. They include rare earth SmCo5 and Sm2Co17 and are referred to as 1:5 and 2:17 materials. There're three different manufacturing processes: sintered SmCo magnets, bonded SmCo magnet, and injection moulding SmCo magnets. SmCo magnet is high performance, low temperature coefficient permanent made of samarium and cobalt and other rare-earth elements. Its biggest advantage is high working temperature-300 degree centigrade. It needn't to be coated because it is difficult to be eroded and oxidized. SmCo magnet is widely used in motor, watch, transducers, instruments, positional detector, generator, radar, etc.

Key Features of Sintered SmCo Magnets

  1. The most excellent temperature characteristics in Rare-Earth magnet family since mid-1960s.
  2. Manufactured by a powder metallurgical process which involves the sintering of powder under vacuum. As part of rare earth group of magnets, SmCo magnets typically fall into two families of materials. They include SmCo5 and Sm2Co17, and commonly referred to as 1:5 and 2:17 materials
  3. Good corrosion resistance and no special surface treatment is required, which makes SmCo an excellent choice for compact designs where high temperature environments may be present.
  4. Grinding and slicing can be operated into the desired shape and size.

Key Features of Bonded SmCo Magnets

  1. Being manufactured using both injection and compression moulding techniques, particularly suitable for high volume production of a wide variety of shapes and size ranges.
  2. Rare-Earth Cobalt5 and Rare-Earth2 Transition Element 17, two different types of powder are applied to production to be varied to achieve the desired magnetic performance.
  3. Precise dimensional control is achieved in both processed and usually the component does not require further machining.
  4. Due to excellent corrosion resistance, coating is not recommended for products

Key Features of Injection Moulding SmCo Magnets

  1. Flexible in shape
  2. Precise in size
  3. Good at consistency
  4. Recombination compaction
  5. Flexible in magnetization orientation
  6. High mechanical strength

Comparison of NdFeB and SmCo Magnets

aterial Energy Products Mechanical Strength Density (lbs/in3-gm/cm3) Corrosion Resistance Temperature Stability Cost
NdFeB 10 to 48 Medium 0.275-7.5 Low Low to Medium Lower
SmCo 15-32 Low 0.300-8.3 High High Higher


RE magnet can be used in many modern high-tech industries, such as acoustics, motors, MRI, electron, electrical computer, machining, measuring meter, oil, metallurgical industrial and so on.


All kinds of permanent materials such as squares, rounds, rings, tiles, bars, and polygons can be supplied according to customer's requirements.

Delivery after magnetization in accordance with blue prints.