How To Weld Cast Iron Tig. Toe or underbead cracks will soon follow. Following is a brief explanation of each.
Generally preheated welding is performed by heating the cast iron from 500 to 1200 degrees. Using the methods discussed above weld the studs in place and cover the entire surface of the break with weld deposit. This will prevent too much heat affecting the cast iron from your arc welder.
I have had really good results tig welding cast iron using AC and Aluminum bronze filler rod.
55 nickel composition can be used which is cheaper. Tig welding without preheat is bad. To TIG weld cast iron follow these steps. I have had really good results tig welding cast iron using AC and Aluminum bronze filler rod.