How To Weld Cast Iron With Brass. Long runs should be avoided. While this is the short answer there is a bit more to unpack to tackle this bit more challenging stick welding project.
Brazing isnt really welding as it doesnt fuse the metal as a weld does. This requires a temperature limit between 320C to 400C. Masses agree to preheat as a better choice while few goes with minimal heat or cold weld.
Cast Iron tends to be a very hard metal to weld and may require you to heat the metal up prior to welding.
Remove paint grease oil and other foreign material from the weld zone. Repairing cracks in nodular cast iron can be tricky. Masses agree to preheat as a better choice while few goes with minimal heat or cold weld. View Cast Iron Stick Electrodes.