See the detailed article here https://goo.gl/pFyopi or visit my online store here https://goo.gl/XrEiHu Tig Welding penetration is affected by the angle of the tungsten grind. 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 bea