I cut an aluminum 80 scuba tank in half and turned it into a trophy case. The outside is 1/2" thick while the shelves are 1/8".
I used the Dynasty 200DX set to 200 amps, 75 balance, 150 frequency, 1/8" E3 Tungsten, 1/8" 4043 filler and 100% medical grade helium.
The welds are mediocre and part of that is due to the following, my hands shake bit sometimes and when trying to rotate the torch and feed the rod, I end up touching the tungsten to the puddle, the filler to the tungsten or the filler seems to arc to the side of the cylinder making it stick for a second.
I lay the cylinder on its side, clamp the shelf in place and start from the middle and work to the outer edge. I rotate the cylinder and try left handed doing the same or sometimes resting my right hand on the shelf and rotating the torch to the outer edge.
Any suggestions would be appreciated.
Edit: I guess I will post pics after the site maintenance is complete