In industry it's pretty common to get aluminum dip brazed, beautiful stuff and
not too expensive. Typically the assembly is tacked together via MIG with .001
spacing of the seams using special shims, then after caustic etching and drying
an expensive silver-based paste is brushed onto the joint. The part then gets
pre-heated and goes into the "pot" where a 1200* molten solution (solid when
cool) allows the paste to flow, creating a joint that's stronger than the
surrounding material. Note that the part must have no entrapped cavities and
that rinsing of all areas is required.
Some alloys don't dip braze well. They can tell you or email me.
The parts are annealled by this process and they must be heat treated
thereafter if necessary.
Hot work this time of year. BJ
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