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Permanent Sintered Alnico Magnets for Odometer of Automobile

Country/Region china
Company Great Magtech (Xiamen) Electric Co.,Ltd
Categories High Gradient Magnetic Separator
Telephone 0086-592-6682467
ICP License Issued by the Chinese Ministry
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Permanent Sintered Alnico Magnets for Odometer of Automobile

Among those famous sintered alnico magnets manufacturers, it is a professional supplier in China, welcome to wholesale alnico pickup magnets, alnico speaker magnet, pick up 5 magnets, horseshoe magnet, pickup magnets from our factory.

Customized Sintered Alnico Magnets

Sintered Alnico magnets are formed by compacting fine Alnico powder in a press and then sintering the compacted powder into a solid magnet. The powdered mixture of contents is pressed into a die under tons of pressure. It is then sintered in a hydrogen atmosphere at 2300F and then cooled either within a magnetic field or without a magnetic field. When cooled within the magnetic field it is known as an anisotropic magnet and when cooled outside of a magnetic field it is called an isotropic magnet. The sintering process is well suited to large volume production.




Up to 0.125" Up to 3.18 mm

±.005" .13 mm

0.126" to 0.625" 3.20 to 15.88 mm

±.010" .25 mm

0.626" to 1.250" 15.90 to 31.75 mm

±.015" .38 mm

Advantages and Disadvantages of Alnico Magnets

Alnico Br as high as NdFeB at room temperature.

Can be used up to 450-550 degrees C (842-932F).

Least variation in magnetic output with temperature change of any magnetic material.

Can be cast in very large sizes.

Sintered alnico is usually limited to small to medium sizes and simpler shapes.

Low coercivity (Hci) making them easy to demagnetise.

Complex cast alnico sometimes needs sand mold tooling which can be expensive if existing tooling is not available.

Production Properties:

Magnetic Property Parameters of Sintered Alnico


Equivalent MMPA Class


Coercive Force

Coercive Force

Maximum Energy Product


Reversible Temp. Coefficient

Curie Temp.

Temp. Coefficient












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