Which is better, lead-tin wire or lead-free tin wire?

From the welding point of view, of course, it is good welding with lead, and the welding seam quality is also good. Lead-free has a high melting point, and relatively lead-free is not good for soldering. From the perspective of environmental protection, lead-free is good. Lead-free is mainly required for environmental protection. Now some products, especially export products, require lead-free. The following are the characteristics of lead-free and leaded:

Features of lead-tin wire:

1. Bright solder joints, good wettability, easy to tin.

2. Composite flux, welding does not splash.

3. The flux is evenly distributed, and there is no broken flux in the core.

4. The winding is neat, no knots, easy welding operation, high work efficiency.

  The characteristics of lead-free tin wire:

1. Good wettability, electrical conductivity and thermal conductivity.

2. The flux is moderate, and the welding does not splash.

3. The flux is evenly distributed, and there is no broken flux in the core.

4. The winding is neat, no knots, easy welding operation, high work efficiency.