Here's a few tests I did in my shop - goldish color is braising and the nickel colored blob is solder. Solder was put on with a simple butane torch but braise rod was put on with Oxy-Acetylene torches. Does this compare to yours? So yeah, heated up to a copper rod dropping on your nickle, the metall pushed off where the copper was dropped looks like from a blow torch

Edited by Mark1959
12/25/2018 7:11 pm