TIG BRAZING CAST IRON WITH ALUMINUM BRONZE FILLER ON AC

Scroll down for exact settings used for tig brazing cast iron using aluminum bronze filler metal on AC

WELD PROCESS = TIG, GTAW, GAS TUNGSTEN ARC WELDING, TIG BRAZING

METAL TYPE = CAST IRON VISE

THICKNESS =  1 INCH

WELD TYPE =  BUILD UP

JOINT TYPE =  BUILD UP TO REPLACE BROKEN MOUNTING LUG

POSITION = FLAT

AMPERAGE = MACHINE SET TO 150  AMPS CONTROLLED WITH FOOT PEDAL ( ACTUAL AMPERAGE 125-140)

TUNGSTEN = 2% LANTHANATED, 3/32"FILLER WIRE = 3/32” ALUMINUM BRONZE ERCUAL-A2

POLARITY = AC

GAS FLOW = 20 CFH argon

CUP SIZE =  8

ADDITIONAL SETTINGS =    AC BALANCE SET TO 75 (25% CLEANING)PREHEAT OF 400F PRIOR TO WELDING

PRE FLOW = .2 SEC

POST FLOW = 7 SEC

TIPS: KEEP A FAIRLY TIGHT ARC AND WATCH TORCH ANGLE

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. 

Maintain temperature of 400F