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AlNiCo Button Magnet Description

The AlNiCo Button Magnet is made of the alloy of Aluminum-Nickel-Cobalt which possesses excellent temperature stability and high residual induction. AlNiCo Magnets have a low coercive force that limits their applications in many cases. Casting and Sintering are two major processes used to manufacture the AlNiCo magnets.

AlNiCo Button Magnet Specification

Materials: Aluminum, Nickel, Cobalt, and Iron;
Magnetic properties:
· Excellent temperature stability;
· Relatively low coercivity;
· High working Temp.: up to 550℃;
· Good corrosion resistance;
· Moderate brittleness.
AlNiCo Grades: AlNiCo2, AlNiCo3, AlNiCo5, AlNiCo5DG, AlNiCo5-7, AlNiCo6, AlNiCo8HC, AlNiCo8, and AlNiCo9
Shapes and size: Button, customized size;
Coatings: Customized;
Applications: Electric motors and generators, Loudspeakers and audio equipment, Magnetic separators, Holding and clamping devices, Scientific instruments, Automotive sensors, etc.

Stanford Magnets specializes in manufacturing and supplying AlNiCo Button Magnets applied in various industrial applications. We have advanced technology, rich experience, and professional engineering technicians in this field. If you require a specific size, please contact us for a quote.


What is an Alnico button magnet?
An Alnico button magnet is a type of permanent magnet that has a compact, circular shape resembling a button. It is made from an alloy containing Aluminum (Al), Nickel (Ni), Cobalt (Co), and often includes Copper (Cu) and sometimes Titanium (Ti) or other elements to enhance its magnetic and physical properties.
What are the key features of Alnico button magnets?
High Temperature Resistance: They can withstand high temperatures up to 540°C (1000°F), making them suitable for applications in hot environments. Corrosion Resistance: Alnico button magnets exhibit excellent resistance to corrosion and do not require protective surface treatments. Magnetic Stability: They offer superior stability over a wide range of temperatures and are less prone to demagnetization compared to some other types of magnets.
Where are Alnico button magnets commonly used?
Alnico button magnets are used in a variety of applications, including but not limited to: Sensors and actuators: Especially in automotive and industrial applications where durable, high-temperature performance is required. Educational purposes: Demonstrating magnetic principles in classrooms. Crafts and hobbies: Due to their aesthetic appeal and sufficient magnetic strength for lightweight attachment purposes.
How strong are Alnico button magnets?
While Alnico magnets are known for their stability and temperature resistance, they do not offer the same level of magnetic strength as rare-earth magnets like neodymium. However, their strength is adequate for a wide range of applications, especially where high temperatures are involved.
Can Alnico button magnets be customized in size and shape?
Yes, Alnico magnets can be customized to a certain extent. However, their shape is generally determined by the manufacturing process, with button magnets being one of the standard shapes. Any customization in size or shape would need to be done before the final magnetization process due to the material's brittleness.
How are Alnico button magnets magnetized?
Alnico button magnets are typically magnetized after they are manufactured, requiring a strong direct current (DC) magnetic field to align the magnetic domains within the alloy.
How should Alnico button magnets be handled and stored?
Handling: Care should be taken to avoid dropping or striking the magnets, as they are brittle and can chip or break. Storage: They should be stored in a dry, mild environment to maintain their magnetic properties. Keeping them with iron or steel keepers can also help preserve their magnetism.
Can Alnico button magnets be used outdoors?
Yes, their excellent corrosion resistance makes them suitable for outdoor applications. However, it is still advisable to consider the environmental conditions they will be exposed to, as extreme conditions could potentially affect their performance.
Are Alnico button magnets affected by nearby magnetic fields?
While Alnico magnets have good resistance to being demagnetized, exposure to strong magnetic fields should be avoided as it can potentially alter their magnetic orientation or strength.
Can Alnico button magnets be remagnetized if they lose their magnetism?
Yes, if they become demagnetized, Alnico button magnets can be remagnetized using a strong magnetic field. This process is best performed by professionals to ensure the magnet is correctly aligned and returns to its optimal magnetic strength.

Protocols and articles

Related Articles
General Information About AlNiCo Magnets
Cast AlNiCo Magnets Vs. Sintered AlNiCo Magnets
Comparing Alnico 2, 3, 4, 5, and 8 Pickup Magnets: A Comprehensive Overview


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