In article , Dave Hinz says...

Maybe 4.2K?

You're gonna go make me look that up, aren't you?
(hangs head in shame) My bad. Wonder how I screwed that up?

Well, some magnets do work at the critical point, which I think
is 8 or 9 degrees. Maybe the ones you worked with ran well
above atmospheric pressure, to keep air out of the system.
That would raise it up above 4.2...

Jim


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