For an outside corner joint on 11ga carbon steel, filler metal diameter could be as small as .045" and as large as 3/32".
1/16" diameter seemed like a good choice but
for this video and procedure, I used 3/32" er70s2 just to show amperage settings for a larger filler rod
WELD PROCESS = TIG, GTAW, GAS TUNGSTEN ARC WELDING
METAL TYPE = CARBON STEEL
THICKNESS = 11GA
WELD TYPE = Fillet weld
JOINT TYPE = CORNER JOINT
POSITION = 1f FLAT
AMPERAGE = MACHINE SET TO 115 AMPS
TUNGSTEN = 2% LANTHANATED, 3/32"
FILLER WIRE = 3/32” ER70S2
POLARITY = DCEN
GAS FLOW = 20 CFH argon
CUP SIZE = 8
ADDITIONAL SETTINGS =
PRE FLOW = .5 SEC
POST FLOW = 7 SEC
TIPS: KEEP A TIGHT ARC
Aim for an arc length that is equal or less than the diameter of your tungsten electrode.Torch angle can be forgiving provided your arc length is tight.Keep the hot tip of the filler wire shielded by the argon envelope from the tig cup