So, found out the hard way that you can’t apply heat to neodymium magnets. Had 16 magnets to press into a print (tool holder). Thought since the soldering pen I use for inserting threaded nuts into prints works so well, I would use it for this too. And it did work well, but now all the magnets are not magnets any more. Yup, heat will demagnetize them. Part is useless, so had to trash it. Found out something new, but wish I had heard about this beforehand.
They lose their coercivity far sooner. The higher the magnetization, the more sensitive it is. So N52 is more temperature sensitive than N45 (but both start to suffer around 80 °C). You also get alloys that are more tolerant and get specifications like 44H that can be used up to 120 °C or 35SH up to 150 °C.