TIG WELDING CARBON STEEL SQUARE TUBING 11GA WALL LAYWIRE PULSE SETTINGS

One of the things that makes it hard to make good looking TIG welds on square tubing is that when you penetrate fully, that brings oxides from the back side into the puddle.  Thats where pulse setting and laywire help

Pulse settings can help for tig welding square tubing 

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WELD PROCESS = TIG, GTAW, GAS TUNGSTEN ARC WELDING

METAL TYPE = CARBON STEEL

THICKNESS = 1/8” WALL THICKNESS TUBE  

WELD TYPE = GROOVE WELD- PARTIAL PENETRATION

JOINT TYPE = BUTT PARTIAL PEN  

POSITION = flat

AMPERAGE = MACHINE SET TO 210 AMPS CONTROLLED WITH PEDAL USING PULSE SETTINGS 

TUNGSTEN = 2% LANTHANATED, 3/32"

FILLER WIRE = 3/32” E70S2

POLARITY = DCEN

GAS FLOW = 20 CFH argon

CUP SIZE =  12

ADDITIONAL SETTINGS =  PULSE SETTINGS 1.5 PPS, 50% PULSE TIME, 35% BACKGROUND CURRENT 

PRE FLOW = .2 SEC

POST FLOW = 11 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 

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