Brazing Cast Iron To Mild Steel. It welds badly because cast iron is actualy dirty, literaly with particles of dirt in the cheap castings, wich the ornaments are. We would weld the pumpkin (cast iron) to the shaft cover (mild steel). A portion of the carbon exists as free carbon or often brazing is the best approach for repairing cast iron, particularly when the parts need to be rebuilt and then machined to the right tolerance.
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Given that steel will rust over time, sealing off the metal is really important. Brazing a project like this is not for the weak person though. Expected failure modes of mild steel and cast iron:
Silicon bronze works for cast iron too but i have found the aluminum bronze to be stronger.
Given that steel will rust over time, sealing off the metal is really important. Do not use the brazing rods intended for copper plumbing fixtures and other red metals with steel. This improves the strength, hardness and toughness while maintaining ductility and ease of machining, resulting in a material similar to mild steel. Although, being cast iron the material is naturally prone to rusting. Edited by cup alloys 1 on 28/10/2018 11:30:45. In other configurations i would consider nickel rods. It's major application is in the repair of modern boron steel automotive panels. In salt water, the brass will corrode away.
