Copper and aluminum can be joined by brazing when _________ alloy

copper-and-aluminum-can-be-joined-by-brazing-when-alloy

Copper and aluminum can be joined by brazing when _________ alloy is used.

A. Copper-zinc

B. Aluminum-silicon

C. Copper-tellurium

D. Aluminum-zinc

The question was posed to me in an online quiz.

This key question is from Soldering and Brazing in portion Metallurgy of Welding, Brazing and Soldering of Engineering Material & Metallurgy

The correct option is B. Aluminum-silicon

To explain I would say: Most metals and alloys such as carbon steels, cast iron, stainless and alloy steels, brass, and others can be brazed. Aluminum and copper can also be joined if an aluminum-silicon alloy is used as the brazing filler metal.