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Analysis of the difference between low temperature tin wire and ordinary tin wire

Article Source: Huizhou Electroloy Technology Co., Ltd.Popularity:2565issuing time:2017-12-30 17:10:40SML

What is the difference between low-temperature tin wire and normal tin wire? Why use low-temperature tin line, it and other tin than what advantage?

This had to start with the low-temperature tin alloy composition, low-temperature tin is Sn and Bi as the main alloy composition of the tin line. The proportion of this tin line is 42% for Sn and 58% for Bi. And usually we have a lead-tin wire is composed of tin-lead alloy, lead-free solder wire is basically made of tin, silver, copper three kinds of metal. In contrast, bismuth is the focus of low-temperature tin line.

So why bismuth metal in low-temperature tin line? Bismuth is added to the tin line in order to lower the melting point of the tin line. The melting point of this tin line is 138 ℃, the conventional tin lead and lead-free tin are above 180 ℃. For example, the melting point of lead-tin wire is 183 ℃ -245 ℃, the conventional melting point of tin-copper wire is 227 ℃. In our welding process, we will encounter some of the components can not withstand the high temperature welding, but the lead, lead-free solder wire melting point are relatively high can not be completed welding, high temperature components will not cause damage, this When we can use low-temperature tin line.

Low-temperature tin wire commonly used in electronic connectors, LED low-temperature electronics and other industries. Wire diameter standard 0.5mm-4.6mm, tin does not contain rosin, need to help with solder paste or flux together. Iron temperature to be controlled between 190-200 ℃.

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