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Do I have to worry about temperature with neodymium magnets?
Yes. Neodymium-Iron-Boron magnets are sensitive to heat.
If a magnet heated above its maximum operating temperature (176°F (80°C) for standard N grades) the magnet will permanently lose a fraction of its magnetic strength.
If they are heated above their Curie temperature (590°F (310°C) for standard N grades), they will lose all of their magnetic properties.
Different grades of neodymium different maximum operating and Curie temperatures.