I know that I will use a magnet to hold a peice of metal in position to tack it, then remove the magnet. I have only done this on thinner material, 1/4 and less, so I never experienced the spatter and uncontrolled behavior like Oldred. .
I do also know that you can't do any kind of tig welding near a magnet, on any thickness, so that would also be in keeping with what Oldred said.
my signature lines...not really directed at anyone in particular..
BE different....ACT normal.
No one is completely useless..They can always be used as a bad example