Weld distortion.

[Gem99ultra]

Excellent video Shield Arc! Thanks - and yes, I did learn a lot from it.

 

[Industrial Toys]

I'm sure any modern video would concern itself mostly with safety. Don't wear your flipflops when welding or don't put your tongue on the hot steel! I'm surprised nothing is said of tacking. Is that more phenomena made popular by mig welding? What amazes me, is that the expansion and contraction forces and significant, yet can be held in check by mere tacking.