WELD PROCESS = TIG, GTAW, GAS TUNGSTEN ARC WELDING, SCRATCH START TIG
METAL TYPE = carbon steel
THICKNESS = 3/8” WITH 1/8” GAP, ZERO LAND, 37.5 BEVELS
WELD TYPE = groove
JOINT TYPE = BUTT WELD
POSITION = 2G PLATE OPEN ROOT WITH 1/8” GAP AND ZERO LAND
AMPERAGE = MACHINE AMPS SET TO 130-150 USING SCRATCH START TORCH WITH VALVE
TUNGSTEN = 2% LANTHANATED,3/32"
FILLER WIRE = 1/8” ER70S2
POLARITY = DCEN
GAS FLOW = 20 CFH argon
CUP SIZE = 8
PRE FLOW = TORCH VALVE
POST FLOW = TORCH VALVE
ADDITIONAL SETTINGS =
TIPS: EXTEND ELECTRODE ENOUGH TO GET A DECENT ANGLE SO THAT WALKING THE CUP OR FREEHAND WELDING BOTH WORK WELL
Hot pass was run at 130-140 and after that 150 amps for fill passes
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 cupSnip oxidized tip of filler metal before a restart
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