Well fox you never cease to amaze me, you have thrown all the technical though miss guided chaff in the air. Possibly caused by the Not thought of by me syndrome and my final word on this subject is this, high current applied using low resistance conductors through as in this case steel with more resistance than the conductors will always produce heat depending on the current flow applied, all governed by the emf. THIS IS HOW A SPOT WELD IS PRODUCED in steel.
So dont knock it if you have never tried it please. Because what I described in my posting was a very large spot welder without the timer as you should know!!!!
Damascus