PSI, also known as pound per inch, is simply a measurement of pressure or stress, @KnZahid300 (View Post)

In essence, what geoatom is referring to is that the tungsten plasma magnet is sort of like tungsten but with two main differences:
1. Unlike normal tungsten, it doesn't crumble into BRMT when exposed to high pressures / PSI
2. It can basically exert a force of sorts on plasma specifically, allowing for use in something along the lines of magnetic confinement nuclear fusion reactors or Tokamak reactors.

@IEATDIRT (View Post)
What I'm saying is that it is sort of like tungsten. I'm not saying that it IS tungsten, but SORT OF like tungsten, for clarification. The general idea appears to be that it's a sort of tungsten alloy of sorts, but also like a magnetic alloy.
I'm not really fussed as to what it's actually called, really, but I'm essentially just saying that said element, based on the name, would probably be similar to tungsten without the brittleness, which, to me, sounds like a tungsten carbide kind of alloy, albeit with something extra thrown in, because as far as I know, tungsten carbide isn't magnetic.

I apologise, of course, if it might've been a bit confusing, as I'm not exactly great at communication sometimes.