Mig Welding Aluminum 1 inch thick with a Spool Gun and preheat 

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27 VOLTS 400 IPM WIRE SPEED WITH 3/64” 4043 WIRE

WELD PROCESS = GMAW, GAS METAL ARC WELDING

METAL TYPE = ALUMINUM ALLOY

THICKNESS = 1" INCH TO 2"

WELD TYPE = Fillet   

JOINT TYPE = TEE

POSITION = 2F

VOLTS = 27.0 volts

WIRE SPEED = 400  IPM

WIRE SIZE = 3/64” 4043

POLARITY = DCEP

GAS FLOW = 25-35 CFH 100% ARGON GAS

CTWD  = 1/2” - 3/4"

FILLER METAL = ER4043 3/64"

ADDITIONAL SETTINGS = PREHEAT OF 200F

TIPS:A longer contact to work distance CTWD of 1/2”-3/4” helps with spray transfer aluminum mig welding.