What is the best process to autogenuous join cast leaded red brass components? The leaded red brass composition is 85% Copper -5% Tin 5% Zinc 5% Lead.
I want the castings joined with no or very minimal compositional changes at the joints. A patina will be applied afterward and compositional changes will result in differences in the patina in the finished sculpture. Defects or holes in the castings also need to be repaired in a few spots. The castings are part of a sculpture, so minimal or no weld bead is desirable.