On Jan 25, 5:55*am, "Wild_Bill" wrote:

I know from experience that many of the useful properties of a clean piece
of copper are completely destroyed when the useful copper item is heated to
red heat.

Induction heating in a hydrogen atmosphere for the purpose of brazing
copper is not a terribly unusual operation (in a scientific instrument
shop). The copper gets cherry-red. The induction coils, also
copper, are usually soft copper tube with cooling water.