In this application a 1/8″ steel plate is soldered to a copper end cap using Muggy Weld SSQ-6 56% silver solder paste.
Always clean both the copper and the steel well before starting the brazing process. Copper to steel pipes have often needed to be joined but the average handyman has had problems in the past soldering these two. SSQ-6 paste is easily applied with a syringe on cold metals.
Caution: Do not store near edible items. If you refrigerate SSQ-6, please store in a “chemical only” designated refrigerator.