How to Choose the Right Cast Alnico Permanent Magnet for Your Application — with Confidence from Mishma Industry

When selecting a cast Alnico permanent magnet for your application, it’s essential to consider several key factors that influence performance, stability, and cost-efficiency. Cast Alnico magnets — made primarily from aluminum, nickel, cobalt, and iron — are known for their excellent temperature stability, strong magnetic field strength, and long-lasting performance. However, the right choice depends on your specific operating conditions. At Mishma Industry (Shanghai) Co., Ltd., we specialise in manufacturing high-quality magnets and provide expert support to help you select the optimal solution.

1. Consider the Operating Temperature

One of the main advantages of cast Alnico magnets is their exceptional thermal stability. They can maintain magnetic strength at temperatures up to ~450-550 °C, far beyond what rare-earth or ferrite magnets can handle.

At Mishma Industry (Shanghai) Co., Ltd., we manufacture AlNiCo grades and can specify the grade best suited to your temperature profile. 

2. Evaluate the Required Magnetic Strength

Different Alnico grades have varying levels of remanence (Br) and coercivity (Hc), which determine magnetic field strength and resistance to demagnetisation.

Because Mishma guarantees consistency of magnetic properties, dimension accuracy and rust-proof treatment in their production lines, you can rely on higher quality and more predictable performance. 

3. Define Size, Shape, and Magnetic Orientation

Cast Alnico magnets can be custom-cast into complex geometries — bars, horseshoes, rings, etc. — making them ideal for mechanical and electronic systems.

For compact assemblies, smaller anisotropic AlNiCo parts can deliver powerful flux density.

Consider whether you need axially or diametrically magnetised magnets — orientation directly impacts performance in magnetic circuits.

At Mishma Industry (Shanghai) Co., Ltd., their production capability includes multiple magnet types (Bonded NdFeB, Sintered NdFeB, Ferrite, Rubber Magnet, AlNiCo, SmCo). 

4. Match the Magnet to Your Application Environment

Each application demands a unique balance of strength, stability, and design flexibility.

Working with a specialist like Mishma can help you tailor the magnet grade, geometry and finish to your environment, ensuring long-term reliability.

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