inSMTThe unused ones in the patchSolder pasteIt would be a waste to throw them away. Next time, another type of solder paste will be used for surface mount. In this case, can these two types of solder pastes be mixed together for use? The following solder paste manufacturer will tell you:

Can leaded solder paste and lead-free solder paste be used interchangeably? Here we will start with the basic components of solder paste. Generally, solder paste can be divided into two types: leaded and lead-free. In layman's terms, leaded solder paste means it is rich in lead.Pb)The solder paste. Lead-free solder paste, also known as environmentally friendly solder paste, must complyRoHSAs stipulated by the standard. BecauseRoHSThe standard stipulates clear requirements for lead, and its lead content must not exceed1000PPMTherefore, it is called lead-free solder paste. Therefore, the two types of solder paste cannot be used interchangeably. This is because when used together, it becomes unsatisfyingRoHSThe standard stipulates that the consequence is that it will not meet the standards when exported.

If they are both lead-tin pastes, can they be used interchangeably? In this case, it is necessary to refine the metal material composition of the solder paste. The metallic material composition of lead-containing solder paste is usually tin.SnLeadPbOr tinSnLeadPbSilverAg"Composition." Generally speaking, there are more solder pastes of tin and lead, and occasionally a little silver is added. The purpose of adding silver is to enhance the electrical conductivity. If silver-containing and leaded solder pastes without silver are mixed, the proportion of silver in the solder paste will be diluted, which will result in the product performance not being as good as expected. Therefore Different lead-containing solder pastes cannot be used interchangeably.

In this case, if they are all lead-free solder pastes, can they be mixed and used? For instance, the components of high-temperature solder paste are tin, silver and copper, while those of low-temperature solder paste are tin and bismuth. Adding bismuth (BiIt is precisely to lower the melting point. If they are used in combination, the melting point is bound to change, and thus it will be difficult to achieve a satisfactory melting point. Moreover, the solder paste solder joints containing bismuth are also a little more brittle, and the soldering effect declines. Therefore Solder paste should not be mixed in daily use.

Shenzhen JJY Industrial Technology Co., Ltd. is a company15As a manufacturer specializing in the research and development and customization of solder paste, lead-free solder paste and leaded solder paste for many years, if you want to learn more about solder paste, please continue to follow the online message of JJY Solder Paste Factory to interact with us.