Soldering and brazing are joining processes that use a filler metal to bond materials without melting them. Soldering uses filler metals with melting points below 800°F to produce weaker but lower cost joints, while brazing uses higher melting point filler metals above 800°F, producing stronger but more expensive joints. Brazing can join dissimilar metals and non-metals and offers benefits like tighter tolerances, less thermal distortion, and easier alignment compared to welding. Most aluminum alloys can be soldered or brazed, though alloys with over 1% magnesium solder poorly and over 5% silicon do not solder well. The choice between soldering and brazing depends on the required strength, corrosion resistance