How To Weld Cast Iron Together. To weld cast iron stick welding is the preferred method and you dont need any Oxy acetylene torch for it. Welding that hot bad.
Cast iron electrodes and copper zinc electrodes are both suitable for oxy acetylene welding of cast iron. Loosen and remove the nut from the bolt on a rubber-lined sleeve clamp using a nut driver. Also dont let the iron get hotter than 1400 F bright red.
If you preheated the part wrap the whole component up after welding.
So its important to understand the reality and the difficulty to adopt stick welding to weld cast iron. Because unappropriated steps can give it more cracks in the pieces. Then weld the studs into the cast iron and cover the entire surface of the break with weld deposit. Cast iron is difficult but not impossible to weld.