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Final answer:
Soldering and brazing use filler metals with lower melting points. Alloys are essential in these processes, providing various beneficial properties.
Explanation:
Soldering and brazing are processes used to fasten metals together using filler metals that have a lower melting point than the metals being joined. For example, soldering uses lead as a filler metal due to its good electrical conductivity and low melting point, making it easy to melt with a soldering iron.
In contrast, brazing involves using filler metals like brass, which is an alloy of copper and zinc. These filler metals melt at temperatures above those used in soldering, providing a stronger joint compared to soldering.
Alloys play a crucial role in both soldering and brazing processes as they offer a wide range of properties, such as increased resistance to oxidation, strength, conductivity, and melting points, which can be adjusted by varying alloy concentrations.
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