Lead-tin solder is a type of alloy commonly used in electronics and metalworking for joining two or more components together. It typically consists of a mixture of lead and tin, with the most common ratio being 60% tin and 40% lead. This combination provides a low melting point, making it easy to work with during soldering processes. Due to health and environmental concerns, the use of lead-tin solder has decreased in recent years, especially in consumer electronics. Many manufacturers now opt for lead-free solder alternatives, which are designed to be safer while still providing effective bonding for electrical connections.