First, the melting point is different

Due to the difference in metal alloys, their melting points are also different. The melting point of the silver-containing lead-free solder wire is 217 degrees, and the melting point of the lead-free solder wire is 227 degrees. The difference is about 10 degrees.

Second, the metal composition is different

The silver-free lead-free solder wire is composed of tin-silver-copper alloy, while the lead-free solder wire is composed of tin and copper alloy, and does not contain silver metal components.

Third, the cost is different

Because of the high price of silver metal, silver-containing lead-free solder wire is more expensive than lead-free solder wire. This is the biggest advantage of lead-free solder wire. The higher the silver content in the silver-free lead-free solder wire, the more expensive it is.

Fourth, the overall performance is different

Due to the action of silver metal, the silver-containing lead-free solder wire is stronger and stronger than the lead-free solder wire, and the solder joint is stronger. Secondly, the electrical conductivity is also an important indicator in the solder joint. Silver is a highly conductive metal, so the silver-containing lead-free solder wire has better conductivity and thermal conductivity than the lead-free solder wire. These properties are beyond the reach of lead-free solder wire.

Five, the solder joint gloss is different

The luster of lead-free solder wire exhibits a certain brightness and looks better. This is also one of the advantages of lead-free solder wire, but the gloss of the solder joint does not represent the solder joint properties of the solder joint itself. The gloss color of the silver-containing lead-free solder wire solder joint affects the brightness of the solder joint appearance. Since the silver metal is a matt metal and is not a bright metal, the solder joint of the silver-containing lead-free solder wire is not bright and matt..