Some guidelines for selecting soldering alloys, characteristics of various solder types, solderable metals, solder selection, the process of producing a good solder joint, and desoldering are discussed. A summary of causes for poor solder connections is given. This results in a metal bond between the metals that is strong and has good electrical conductivity under harsh mechanical environments.
Solder is a metal alloy consisting of distinct percentages of two or more metals .
Solder that uses lead has a lower melting point than pure lead. However, some solders contain no lead. Note that this particular alloy's melting point is lower than either of the parent metals. Every soldering application requires solder with particular characteristics . Important characteristics include melting temperature, hardness, strength, and ease of bonding the metals being soldered.