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Alnico magnets are renowned for their high remanence, low coercitivity, and temperature stability. The properties for each grade at room temperature are listed in Tables 1 and 2. Furthermore, additional information such as demagnetization curves for different temperatures is available for download in the datasheets. Table 3 outlines the general characteristics of Alnico magnets. Figure 2 illustrates the temperature stability, depicting the demagnetization curves of Alnico 5 grade from -180 C to +300 C. This figure demonstrates how the output of the magnet remains constant when the working point is near BHmax over a large temperature range.Table 1: Typical magnetic properties of cast Alnico magnet
Table 2: Typical magnetic properties of sintered Alnico magnet
The physical properties of Alnico magnets are presented in Table 3. It should be noted that these values should not be considered as guaranteed, as they are not monitored during the manufacturing process.Table 3:Physical Properties of Alnico magnets
Surface Treatment: Alnico magnets typically do not need any protection from corrosion and can be used without a coating. However, some applications may require a smooth surface, and in these cases, a protective coating can be applied. 
Notes:
The corrosion resistance of these coverings fluctuates depending on the form of magnets, such as chamfers and inner rings, in diverse surroundings.
Alnico Rod Magnets - The Premium Choice for Speakers and Microphones When it comes to achieving high-quality sound and reliable performance in speakers and microphones, Alnico Rod Magnets are a premium choice. These magnets, made of a special alloy of aluminum, nickel, and cobalt, offer high magnetic strength, stability, and consistency, making them ideal for a wide range of audio applications. At their core, Alnico Rod Magnets are designed to produce a strong and uniform magnetic field that interacts with the voice coil of a speaker or microphone, converting electrical signals into sound waves or vice versa. The cylindrical shape and precise dimensions of Alnico Rod Magnets ensure a precise and stable magnetic field that can enhance the clarity, accuracy, and dynamics of audio signals. One of the key advantages of Alnico Rod Magnets is their high magnetic strength and stability over time. With a high coercivity and a low temperature coefficient, these magnets can maintain their magnetic properties even under high temperatures and intense use. Additionally, Alnico Rod Magnets have a low magnetic hysteresis, which means they can respond quickly and accurately to changes in electrical signals, resulting in a more natural and realistic sound. At Honson Magnetics, we offer a range of Alnico Rod Magnets in various sizes and strengths to fit your specific speaker and microphone needs. Our magnets are manufactured with strict quality control and precision machining, ensuring a consistent and reliable performance. Contact us today to learn more about Alnico Rod Magnets and how they can enhance your speaker and microphone systems with their high magnetic strength, stability, and accuracy.