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Welding non ferrous metals like copper and sterling silver. Is this ok? Answered

I'm interested in welding 16 gage sterling silver sheet which is currently bolted with brass screws to 18 gage silver joining plate, so the brass bolts and silver plate can be permanently removed from the construction. In order to prepare for this process and to minimize the likelihood of melting or otherwise ruining the sterling silver sheet, I want to practice the technique on a 16 gage copper sheet mock-up.