The similarities and differences of solder wire and silver-free solder wir

The similarities and differences of solder wire and silver-free solder wire 

(1) the melting point is different: due to the different metal alloy, so the melting point is also different. Silver-free lead-free solder wire melting point: 217 degrees, and lead-free solder wire melting point: 227 degrees difference of about 10 degrees.

(2) different metal composition: silver-free lead-free solder wire is made of tin silver copper alloy, and lead-free solder wire is a tin and copper alloy composition, excluding silver metal composition.


(3) Costs are different: silver-free lead-free solder wire is more expensive than lead-free solder wire because of the high price of silver metal. This is the biggest advantage of lead-free solder wire. The higher the cost, the more expensive the cost

(4) the overall performance of different: due to the role of silver metal, lead-free solder wire than lead-free solder wire firmness better, stronger, more solid solder joints.Second, the conductive properties in the solder joint is also very important , Silver is a very good conductive metal, so silver-free lead-free solder wire than lead-free solder wire conductivity, thermal conductivity and so on are better. These properties are lead-free solder wire can not go beyond.


(5) solder color gloss different: lead-free solder wire gloss is showing a certain degree of brightness, look better look. This is one of the advantages of lead-free solder wire, but the solder color does not mean the welding Point of its own welding performance, while the silver-free lead-free solder wire solder joints affect the appearance of the solder color brightness of the color.As the silver metal is matte metal, not bright metal, so silver-free solder wire solder Point gloss is matte color and brightless.