What is a primary reason for the ongoing use of tin-lead solder?

The ongoing use of tin-lead solder is largely attributed to its excellent electrical conductivity. Tin-lead solder boasts superior electrical and thermal conductivity compared to many alternatives, making it highly effective for joining electronic components where efficient electron flow is crucial. This quality ensures reliable and stable connections in various electronic applications, contributing to the performance and longevity of devices.

While availability and low cost may be factors for some materials, they do not specifically highlight the unique performance characteristics that tin-lead solder provides. Additionally, while color and appearance might be considerations in some contexts, they do not significantly impact the functionality of solder in electronic applications. Environmental benefits are also relevant, especially with growing concerns about hazardous materials, but when focusing on the primary technical advantages of tin-lead solder, its exceptional electrical conductivity stands out as the most compelling reason for its continued use.