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confused by the available grades

If you should be confused by the available grades of Neodymium or interested in learning how a class is assigned to a specific Neodymium alloy, this post is actually for you.

N35, ND-35, and ND-3512 are all similar “Grades.” They represent a neo magnet alloy which includes an Energy Density (optimal Energy item) of 35 and has an Intrinsic Coercive power of 12 kOe. The 12kOe results in a maximum operating temperature for magnet of 80°C. (the particular optimum Operating Temperature is geometry dependent together with 150°C can be used here for illustrative purposes.)

N45SH, ND-45SH, and ND-4520 are equivalent grade of Neo alloy. This notation presents a neo magnet alloy that has an electricity Density (Maximum Energy Product) of 45 and it has an Intrinsic Coercive energy (Hci) of 20 kOe. The 20kOe is suggested within the quality notation because of the “SH” suffix and causes a maximum operating temperature the magnet of 150°C. (the specific optimum Operating Temperature is geometry dependent therefore the 150°C is employed here for illustrative reasons.)

Neo Grade Explanation
As explained above, a Neodymium magnet’s “Grade” comes from the power Density (optimum Energy Product) and some signal of the Neodymium alloy’s capacity to run at increased conditions. Knowing the quality just isn’t enough to anticipate a magnet alloy’s overall performance in an application. The Neo magnet’s grade will have various other qualities which are familiar with assess the magnet’s performance in a software. Unless the application is at background room temperature, the magnet has a Magnetic Length / Diameter ratio > 0.7, and there’s no additional demagnetizing fields, a performance analysis should be executed. Please engage a Dura application representative for assistance when choosing a Neo grade for your application.

Related Pages and TechTalk Articles for More Information:
The reason why Magnets Lose energy: the results of Volume reduction, Geometry, Elevated Temperature, and Demagnetization from External Fields
Aftereffects of temperature on Neodymium Magnets: Reversible vs. Irreversible Field Loss
What’s optimal Energy item / BHmax and exactly how Does It match Magnet Grade?
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