TIG WELDING 4140 STEEL TUBE INSERT .125" WALL TUBE FILLET

WELD PROCESS = TIG, GTAW, GAS TUNGSTEN ARC WELDING

METAL TYPE = 4140 chromoly tube and chrome vanadium socket insert

THICKNESS = .125” 

WELD TYPE = FILLET   

JOINT TYPE = LAPJOINT

POSITION = 2F

AMPERAGE = 110-130 amps with foot pedal

 TUNGSTEN = 2% LANTHANATED, 3/32"

FILLER WIRE = .045” ER70S2

POLARITY = DCEN

GAS FLOW = 20 CFH argon

CUP SIZE =  12

PRE FLOW = .5 SEC

POST FLOW = 7 SEC

ADDITIONAL SETTINGS =  

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 cupSnip oxidized tip of filler metal before a restart

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