It depends on the application. If you need the highest strength in the smallest possible package at room temperature, grade N52 is the strongest available.
Many of our magnets are offered in grade N42, which is a great balance between cost, strength and performance at higher operating temperatures. You can get the same strength as an N52 magnet by using a slightly larger N42 magnet.
If you have slightly elevated temperatures, in the 140°F to 176°F range (60°C -80°C), N42 magnets might actually be stronger than N52. This is especially true if your magnet shape is very thin. See our detailed article on Temperature and Neodymium Magnets for more details.
For even higher temperatures, consider some of our High Temp Magnets, offered in the N42SH grade. For a complete list of available grades, see our Specs page.
