There are several charts in text books and on web sites that depict the penetration profile caused by different grind angles of tungsten electrodes.
I like to see things for myself so I tested 3 very different angles on pieces of 2% lanthanated electrodes ...all 3/32" (2.4mm).
I let the piece cool completely in between beads and kept the arc gap the same for all three beads.
Travel speed as constant too on a welding turntable.
I cut the beads all the same distance from the start point and polished and etched using a stainless steel heat tint removal solution.
There are many different ways to tig weld a tee joint. In this video I show 3 different ways...straight dcen with no pulse using a foot pedal, 1 pulse per second with foot pedal floored at 131 amps, and pumping the foot pedal for sort of a manual pulse.
For 11ga cold rolled steel lap joints its all about torch angle and arc length.
Torch angle is pretty forgiving provided your arc length is tight.
So what is tight enough? The electrode diameter or less works for me
Fabricating a stainless steel part and talking about maintaining the corrosion resistance of stainless steel. Outside Corner joints using Aluminum angle backing
