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First, the high temperature specifications
The high temperature resistance of magnets depends on their performance grades. Generally speaking, magnets with performance grades of N30M, N33M and N35M can withstand stable use up to 150℃. Magnets with performance grades of N38SH, N40SH and N42SH can withstand temperatures as high as 200℃. If higher temperature tolerance is needed, magnets with high performance grade can be selected and used within the specified temperature range.
Second, the magnetic force
Magnetic force is an important parameter of magnet, and it is also one of the factors to be considered when it is used in high temperature environment. Generally speaking, the stronger the magnetic force, the stronger the high temperature resistance. Because strong magnetic force can improve the coercivity of magnets, making them less prone to demagnetization or deformation with temperature changes. Specifically, if you need to use it in a high temperature environment, you can choose a magnet with a surface magnetic field higher than 1000Gauss, which is not only strong in magnetic force, but also strong in high temperature resistance.
Third, quality
The quality of magnet is also one of the factors that affect its high-temperature service ability. Generally speaking, the better the quality of the magnet, the stronger the high temperature resistance. Because the materials and production technology used in the manufacturing process of high-quality magnets are fine, they can withstand higher temperatures and pressures. Therefore, when choosing magnets, we should choose some excellent brands and manufacturers to ensure product quality and improve high temperature resistance.