Correct option is A
Brazing is a metal-joining process that uses a filler metal to bond two base metals without melting them. The key characteristic of brazing is that the filler metal melts above 450°C but below the melting point of the base metals.
· The liquid temperature of the filler metal used in brazing is typically above 450°C but below 900°C, depending on the filler composition.
· One of the most common filler metals used in brazing is silver-based (Ag-Cu-Zn) alloys, which have a liquid temperature around 427°C to 900°C.
