Alnico alloy magnets are divided into Alnico 1,2,3,4,5,6,7,8,9 according to the different composition content. Today, this paper mainly introduces the difference between Alnico 5 and 8 categories, including magnetic strength, composition ratio, application and so on.

Composition and structure comparison of AlNICo 5 and 8;

Alnico 5 is an alloy composed of elements such as aluminum (Al), nickel (Ni), cobalt (Co), steel (Fe), and aluminum-silicon (AlSi). It usually comes in two structural forms: cast Alnico 5 (cast) and sintered Alnico 5 (sintered).

Alnico 8 is also an alloy composed of elements such as aluminum, nickel, cobalt and aluminum-silicon. It usually comes in the form of sintering.

Material chemical composition differences between Alnico 5 and 8:

Alnico 5 vs Alnico 8 Magnetic property;

Alnico 5 has good magnetic properties, which provide high permeability and high residual magnetic induction.

Compared with Alnico 5, Alnico 8 has higher permeability and higher residual magnetic induction, so it is superior in magnetic properties.

Application difference between Alnico 5 and Alnico 8;

Alnico 5 is commonly used to manufacture a variety of magnets, including motors, generators, sensors, speakers, electromagnetic relays, and more.

Alnico 8 is commonly used in applications that require higher magnetic properties, such as high-performance motors, sensors, and audio devices.

Aluminum nickel cobalt ring and hollow cylindrical magnets

Thermal stability performance of both;

Alnico 5 shows good thermal stability at high temperatures, while 8 is even better. https://www.couragemagnet.com/aluminum-nickel-cobalt-magnets/

To sum up, Alnico 5 and Alnico 8 are two kinds of magnetic alloy materials with different magnetic properties, which have different advantages in different applications. Alnico 5 and 6 are more commonly used, and Alnico 8 and 9 are high-quality grades. The selection of suitable materials depends on the specific application needs. Such as the required magnetic properties, operating temperature range and other factors.

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