Not enough penetration
Hi there! Thanks again for a great site! I have been reading here since December, a few months before I got a hold of my first TIG machine. Since then I've been welding like crazy, thanks for all the tips and tricks! But, I have one question, I've been primarily welding thin SS plates, now I have to weld some 4-6mm mild steel plates, corners, flat welds, and some other different varieties. The problem is that I can't seem to get enough penetration, with a 3/32" electrode and 120-150 amps, 10L/min gas flow, I only have a puddle about 3-4mm wide, and things are going veeery slowly, it seems I can't get enough heat into the metal fast enough. It all results in a very hot part, had not much weld to brag about.
I'm sure you get alot of these questions, but I thought I'd give it a try... Anyway, any tips is greatly appreciated!
The TIG welder I have is a chinese type 160AMP with AC/DC
it sounds to me like your issue is amperage.
personally, i have welded quite a bit of steel in the thickness you reference using a Miller Dynasty 200dx and I usually max it out at 200 amps.
Not that i absolutely need all that amperage, but I do want to get the job done and travel as fast as i can to avoid heating the part up too much.
try to use a tight arc length and see if that helps.
if not , its your amperage limitation.
you may have to do multiple passes ,
thnks for the post,