The lead-free solder wire used in manual electronic raw device welding is composed of tin alloy and auxiliary two parts, in electronic welding, lead-free solder wire and electric iron match, high quality electric iron provides stable and continuous melting hot star, lead-free solder wire as filler metal added to the surface and gap of the electronic raw device, the fixed electronic raw device becomes the main component of lead-free welding, lead-free The composition of solder wire is closely related to the mass star of lead-free solder wire, which will affect the chemical properties, mechanical properties and physical properties of lead-free solder wire.

The difference between lead tin wire and lead-free tin wire:

1. From the appearance of tin gloss color, the surface of lead solder looks bright white; Lead-free solder is pale yellow.

2. From the metal alloy composition: lead solder is containing tin and lead two main metal elements (such as: Sn63Pb37, Sn50Pb50, etc.); Lead-free solders are basically lead-free (EU ROHS are less than 500PPM lead, Japan is less than 100PPM lead) and contain metal elements such as tin, silver or copper.

3. From the use of points: lead solder is used for the welding of lead products, its tools and components are lead. Lead-free solder wire is used for the welding of products exported to Europe and the United States and other countries, and the tools and components used must be lead-free.

4. If you use the method of hand rubbing to distinguish: lead will leave black marks on the hand, there is no lead, light yellow marks, because the lead is generally contained in copper metal.

Therefore, the choice of lead tin wire or lead-free tin wire needs to be based on your own product needs, not lead-free is good! Suitable for their own products!