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AMSC supplies a full spectrum of magnets products.

The following are the brief descriptions of the different type of magnetic material and magnet assembly which will only give a basic introduction of the magnetic material and magnet components. Our technical support team are able to provide material selection, prototyping and other related services, for most of the cases free of charge to our customers.

Rare Earth Magnets

They are called rare earth magnets because their composition elements found in the Rare Earth of Lanthanides family of the Periodic table of Elements.

Neodymium Iron Boron (NdFeB) magnets are a type of rare earth alloy with typical atomic structure of Nd2Fe14B which stands for 2 atoms of Neodymium, 14 atoms of Iron(Fe) and one atom of Boron. There are some other elements that may be used for purposes of improving the coercivity, gaining lower weight loss and other special characteristics.

The sintered Neodymium Iron Boron magnet has higher magnetic properties compare to Samarium Cobalt magnets, however it is more easily oxidized and generally does not have the same temperature resistance. The highest energy products for NdFeB could reach 52 MGOe commercially or more. These materials are only used in very selective applications due to the cost. Cost is also driven by existing intellectual property rights of the developer of this type of magnets. Their high energy products lend themselves to compact designs that result in innovative applications and lower manufacturing costs. NdFeB magnets are highly corrosive, so that various surface treatments include nickel, Zinc and gold plating as well as epoxy resin coating.   

Samarium Cobalt is another type of rare earth magnet materials that are highly resistant to oxidation, have a higher magnetic strength and temperature resistance than Alnico or Ceramic materials. Samarium cobalt magnets are divided into two main groups: SmCo5 and Sm2Co17 with energy products range from the 1-5 series is 15-24 MGOe, the 2-17 series falling between 22-32 MGOe. These magnets offer the best temperature characteristics of all rare earth magnets and can withstand temperatures up to 315ºC (around 600ºF) . Sintered samarium cobalt magnets are brittle and prone to chipping and cracking and may fracture when exposed to thermal shock. Due to the high cost of the material samarium, samarium cobalt magnets are used for applications where high temperature and corrosion resistance is critical. 

Alnico Magnet

Excellent temperature stability, high residual induction, and relatively high energies characterize Alnico materials, composed primarily of alloy of Aluminum, Nickel, and Cobalt. They are manufactured through either a casting or sintering process. Cast magnets may be manufactured in complex shaped, such as horseshoes, not possible with other magnet materials. Sintered Alnico offer slightly lower magnetic properties but better mechanical characteristics than cast Alnico.

Ceramic Magnets (Ferrite)

Hard ferrite ceramic (Hard Ferrite) magnets were developed in the 1960's as a low cost alternative to metallic magnets. Compared with other permanent magnet materials they exhibit low energy and relatively brittle and hard, ferrite magnets have won wide acceptance due to their good resistance to demagnetization, excellent corrosion resistance and low price per pound. In fact measured by weight, ferrite represents more than 75 percent of the world magnet consumption. It is the first choice for most types of DC motors, magnetic separators, magnetic resonance imaging and automotive sensors. 

Magnetic Assembly

Main Applications:

  • Automotive sensors, motor and actuators

  • Oil and gas industry sensor and drive systems.

  • Chemical and food industries, permanent magnets drives cleans and safe motive power for couplings, pumps and blenders etc.


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