The difference between low temperature and high temperature lead-free solder bars

Author: admin / 2022-11-18

The difference between high-temperature tin bars and low-temperature tin bars mainly lies in the level of antioxidants added to tin bars and the difference in materials. Their application ranges are different and each has its own advantages.

1. High temperature lead-free tin bar has extremely high oxidation resistance.

2. The high-temperature lead-free tin bar has very little impurity and scum, which is only about 1/7 of ordinary solder.

3. The solder joints are bright and easy to tin.

Working characteristics and characteristics of high temperature aluminum welding wire

For example, in the process of two solderings, if the first time is soldered at a high temperature of 260°C-450°C, and the second time is soldered at a lower temperature such as tin, silver, copper, etc., the first high-temperature solder will not be melted within 10 seconds , It can prevent the phenomenon of tin flow and tin melting when reflowing at 260°C.

Due to the high-temperature lead-free tin bar, it is suitable for wave soldering and hand-immersion furnace processes with high working temperature requirements, especially for the manufacture of transformers, as well as tinning of self-dissolving enameled wires, such as tin on transformer leads and so on. The effect of very low dross not only reduces bad solder joints, but also saves costs and reduces the number of tin pot maintenance.

The difference between warm tin bars and high temperature tin bars is mainly the level of antioxidants added to the tin bars. Many people mistakenly think that it has something to do with its melting point. For example, SN-CU0.7 has a melting point of 227 degrees, while silver-containing tin bars have a melting point of about 217 degrees. They mistakenly think that SN-CU0.7 is high temperature, and others are not. Generally, the working temperature of high temperature can reach 400-480 degrees.

The higher the lead content, the higher the melting point and the higher the corresponding working temperature. High temperature and low temperature are divided into two, one is the high and low melting point, the other is the high and low working temperature.

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