Álnico magnets are composed of an alloy of aluminum, nickel, and cobalt. They are the magnets with the highest stability at extreme temperatures; for this reason, we can find them inside ovens performing the function of holding or detecting.

Álnico magnets are created through a production process that has two different methods of creation: casting or sintering. In these two processes, we find the molding phase, which allows us to create magnets of different shapes according to the need we want to fulfill.

We supply álnico magnets with the best characteristics. Additionally, álnico magnets can come in different shapes such as rods, blocks, rings, or discs.


Type of material




Work temperature

From -250ºC to 425ºC


High level of induction
Stable at extreme temperatures
Outdoor application

The álnico magnet was made of aluminum, nickel, and cobalt. Álnico magnets have good corrosion resistance, providing magnetic stability.

The horseshoe-shaped álnico magnet is the most well-known product due to its design, which is attributed to describing a conventional magnet.

The álnico magnet possesses both isotropic and anisotropic properties, depending on the required grade. The most common grades of álnico are 5 and 8. Álnico magnets have an ease of magnetization due to their low coercive force.

Similar to samarium magnets, álnico magnets have a higher cost compared to other permanent magnets, as they are made from cobalt. Cobalt is a raw material that comes from abroad, making its cost elevated.

The álnico magnet is the magnetic element with the greatest stability at extreme temperatures, meaning it retains all its magnetic properties between -250°C and 425°C, ensuring high thermal resistance. (In the case of neodymium magnets, the maximum working temperature is 200°C).

We provide a table displaying the characteristics of álnico magnets for your reference. It indicates magnet qualities such as magnet remanence, coercive force, working temperatures, and minimum and maximum resistance.


IMAGradoNomenclatura RemanenciaFuerza CoercitividadCoercitividad IntrínsicaEnergía Máxima ProductoTemperatura de Trabajo
ImamagnetsGradeNomenclatureRemanenceCoercive forceIntrinsic coerciveMaxium energy productWorking temp
Alnico MagnetsGradeNomenclatureBrFuerza bHcFuerza Ihc (BH) maxWorking temp
Alnico MagnetsGradeNomenclatureBr max (T) Br min (T) HcB min (kA/m) HcB max (kA/m) HcJ min (kA/m) HcJ max (kA/m) BHmax min (kJ/m³) BHmax max (kJ/m³) Max. Temp. trabajo: (ºC)
LNG40AlNiCo 40/0 1,23 48,00 40 550
LNG44AlNiCo 44/0 1,2552,0044550
LNG48AlNiCo 48/01,2856,0048550
LNG52AlNiCo 52/01,3056,0052550
LNGT32AlNiCo 32/00,80100,0032550
LNGT38AlNiCo 38/00,80 110,0038550
LNGT44AlNiCo 44/00,85115,0044550
LNGT48AlNiCo 48/00,90 120,0048550


Despite the emergence of stronger materials and more economical solutions, álnico magnets still possess a special property - having a lower coercive field that enables magnetization and demagnetization with low electrical powers.

The magnetic orientation of these products must be performed during their heat treatment, ensuring a magnetic field with the defined magnetization direction. The force that álnico magnets can provide is most similar and comparable to neodymium magnets.

Another significant advantage is their resistance to chemicals, such as acids or solvents, and their good performance in oxidation.


Alnico magnets, thanks to all the characteristics mentioned above, can be used in various sectors. In addition, they have a high magnetic induction because this type of permanent magnet can be used in magnetic field measuring instruments.

The high temperatures at which alnico magnets can work, together with their thermal resistance and their great strength, open up a wide range of possibilities in different industrial sectors. It is a perfect alternative to materials such as neodymium or ferrite.

Electric Motors
Electric guitar pickups
Aerospace sensors

Production process

To obtain alnico magnets we can follow two processes: casting and sintering:

  1. The phase known as weighing, in this we must make the correct composition of the magnet avoiding oxidation and impurities of the raw materials.
  2. The fusion process. Here we find the molten matter that will later be poured into a mold.
  3. Later, continuing with the melting phase, we will identify the quality of the magnet according to the level of whiteness that the magnet has
  4. Next, we will pass the magnet to heat treat it to give it future resistance to oxidation.
  5. Finally, it will be magnetized and the production process for this alnico magnet will be terminated.
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