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TIG WELDING ALUMINUM 1/4" THICK LAP 2F

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The thing about Aluminum that makes it more challenging to weld is the thermal conductivity.

The piece welded in the video above required 200-225 amps.

If that piece was twice and the same exact thickness, it would probably have required another 10-20% more amperage due to the conductivity.

Thats where a low preheat of 150-200F can help a lot.

Preheating aluminum slows the cooling rate, drives off moisture, and lessens the amperage required.

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WELD PROCESS = TIG, GTAW, GAS TUNGSTEN ARC WELDING


METAL TYPE = ALUMINUM 6061

THICKNESS =  1/4” 

WELD TYPE = FILLET WELD

JOINT TYPE = LAP

POSITION = 2F HORIZONTAL

AMPERAGE = 225 AMPS CONTROLLED WITH FOOT PEDAL

TUNGSTEN = 2% LANTHANATED, 1/8"

FILLER WIRE = 1/8” 4043

POLARITY = AC

GAS FLOW = 18CFH  

CUP SIZE =  7

ADDITIONAL SETTINGS =   AC BALANCE 30% CLEANING, AC FREQ 77HZ

PRE FLOW = 1 SEC

POST FLOW = 10 SEC

TIPS: KEEP A FAIRLY TIGHT ARC AND KEEP  TORCH ANGLE TO A MINIMUM

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.  

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