Low-temperature tin wire — when the brightness of a solder joint is off, is it due to unstable tin content? JJY will guide you through the related knowledge and answers about tin wire.

A tin content below 20% leads to dim Tin wire solder joints, and there is no reason to look further. Right? When the tin content is above 28% but the solder joint still does not shine, the following points should be analyzed:

If the tin content is off, brightness is impaired. Mainly, when the tin content is below 63%, the higher the tin content, the brighter the solder joint; conversely, when the tin content is lower, the brightness becomes dimmer. However, under normal circumstances, it is rather difficult to identify differences within about 5%.

Secondly, even with the same tin content — such as 63% — a significant difference in residue composition can also impair solder joint brightness. Some chemical elements have a more obvious impact on brightness, such as copper, bismuth, silver, arsenic, and iron.

However, solder joint brightness is also affected by temperature. If solder joints are to show good gloss, the temperature must be sufficient; otherwise, surface smoothness is reduced and roughness and unevenness result.

JJY has proven through practice that a 20-watt electric soldering iron and a 60-watt soldering iron, when used on the same type of Solder Wire, produce different brightness levels. For more information about tin wire, please feel free to consult Shenzhen JJY for one-on-one answers.