SS and galvanized sheet materials are commonly brazed to manufacture sanitary/kitchen equipment where elevated temps. of liquids and heating elements are involved. They are brazed (>840*F) using silicon bronze filler materials (AWS A5.7-XX). Typically used to join the dissimilar materials. This was one of my first tasks as a 1st time TIG welder back in 1975.
Beads look nice and pretty (shiny orange, yellow or straw) when the optimum brazing temp. and shielding are maintained by the gas tungsten arc process. I keep some downstairs for the models I build with scrap, nuts/bolts, rod and wire.
Overheating the joint often results in a failed operation due to the intermixing of the base metal and the primarily copper-based filler metal not intended for this type of application.