What should the tin content of the solder wire be

Solder wire is the medium connecting components and circuit boards. Solder materials are essential in the production and maintenance of the electronics industry. So what should the tin content of the solder wire be? The following is analyzed by Shenzhen Xinghongtai factory technicians:

 
What should the tin content of the solder wire be

The main components of leaded solder wire are lead and tin. The eutectic point of the tin-lead alloy is 6337, which means that the tin (sn) content is 63%, the lead (pb) content is 37%, and the eutectic temperature is 183 degrees The crystal structure of the crystal is very fine, and it is not easy to change due to the influence of the environment, so that the reliability of the PCBA is guaranteed, and the operating temperature is low, which is convenient for soldering. In actual application, it also divides a lot of alloy ratio solder wires, such as 60 tin / 40 lead, 55 tin / 45 lead, 50 tin / 50 lead, 45 tin / 55 lead, 40 tin / 60 lead, etc., which alloy to choose The specific ratio needs to take into account its own needs, cost estimates and welding efficiency.

In order to meet environmental protection requirements, many factories have begun to use lead-free solder wires with a conventional tin content of 99.3%. "

The tin content of the solder wire is: 63 tin / 37 lead, 60 tin / 40 lead, 55 tin / 45 lead, 50 tin / 50 lead, 45 tin / 55 lead, 40 tin / 60 lead, 35 tin / 65 lead Wait, because the price of tin is about 6 times the price of lead, so the more tin content, the better the price; In addition, pure tin solder wire, the tin content can reach 99.3%, the higher the purity, the more environmentally friendly, no harm to the body.

Shenzhen Xinghongtai Tin Industry Co., Ltd. is a professional solder wire manufacturer.It has been focusing on the research and development of solder wire for 12 years.It provides solder wire, lead-free solder wire, lead solder wire, solder wire, solder bar and solder wire of different specifications.