is a kind of solder material, which is mostly used for manual soldering products. At present, most tin wires contain flux such as rosin. Using tin wire can reduce the process and improve the efficiency of soldering operations. Leaded tin wires and lead-free tin wires can be distinguished from the following aspects:
1. Judging from the glossy color of tin appearance: the surface of lead solder looks bright white; lead-free solder is light yellow.
2. From the composition of metal alloys: Leaded solder contains two main metal elements, tin and lead (such as: Sn63Pb37, Sn50Pb50, etc.); lead-free solder is basically lead-free (the EU ROHS standard is that the lead content is less than 1000PPM), lead-free solder generally contains tin, silver or copper metal elements. The PBM value of the lead-free tin wire produced by Shuang Chilean tin wire manufacturer is around 300, and the 100PBM needs to be communicated and confirmed in advance before ordering.
3. In terms of usage: Leaded solder is used for soldering leaded products, and the tools and components used in it are all leaded. Lead-free solder wire is used for welding products exported to Europe, America and other countries, and the tools and components used must be lead-free.
4. Use the method of hand rubbing to distinguish: those with lead will leave black marks on the hands, and those without lead will have light yellow marks, because lead-free generally contains copper metal. the
5. The outer packaging of lead-tin wire and lead-free tin wire is also different. Lead-tin wire is packaged in a gray box, and lead-free tin wire is packaged in a green box.