Is it possible to weld cast iron?
Cast iron can be welded with varying degrees of success. Most electrode manufactures produce suitable consumables. Stubbs 8’s are the first to come to mind. From experience for a crack I’d suggest grinding to to leave a root face the same as the rod diameter, local pre-heat with gas flame, lay down deposits of 25mm in length and peen using a chipping hammer with a radiused tip, and continue like this untill the weld is completed. I always found it best doing this as a two man operation. On completion wrap the component in insulation and allow to cool. And cross your fingers!!
