Brazing a Large Cut in a Cast Iron Exhaust Manifold

A cast iron exhaust manifold is brazed with SSF-6 Silver Solder. We cleaned a 3 to 4 inch cut, then silver soldered the cut with an oxyacetylene torch.



  •  When working on a cast iron it is important not to heat the base metal bright red and never cool down with water.
  • Flow out each drop of rod before depositing more.
  • To achieve the best seal, create a flat braze. Use more flux if necessary.
  • Broad heating is important to get a ensure an even flow.


NotePlease observe all AWS Safety & Health Guidelines when using Muggy Weld products.