Hi, I'm trying to TIG a 130 degree fillet that has to have a 3/16" throat. My first try using a single pass I got a good looking weld but the throat is only half of what it should be. The penetration is good (I looked at the cross section).
Later I worked it out mathematically and found a flat face weld will actually require about 6 inches of 1/8" filler per inch of weld. The resulting face of the weld is a whopping 0.8" wide.
I guess my question is what would be better at this point: Should I weave widely and accomplish the weld in one pass or should I use multiple passes? I was concerned that multiple passes might compound weld stresses.
Here's the details of my first attempt:
materials: base plate: 1/4 mild steel angled plate: 3/16 mild steel position: horizontal parameters: 200A, 3/32 electrode w/standard point, gas lens w/#6 cup, 5/16" electrode stickout, 16 cfh argon, 1/8" E70-S6 filler welder: Miller Dynasty 200 application: structural steel
I was tempted to try a bigger filler rod if they make it (5/32?) but I read here that it tends to pull heat out of the pool, and my machine is working at its peak already.
Any help appreciated.
--zeb