Thanks for sharing. A Ferroweld steel electrode is best used for casting iron. I used this in class when I was attending a welding certification course
in weldtech training. It has a lower cost and is user friendly. The weld deposits are hard and are not machine able but they can be finished by grinding. This is the lowest cost electrode for welding cast iron and the electrode has a user friendly arc. It tolerates welding on castings that cannot be completely cleaned before the welding. Ferroweld deposits rust like cast iron, this can be important while repairing cast iron parts like exhaust manifolds on antique cars.