Why are the solder joints of SCS7 shiner as compared to SAC305 joints?
A3. SCS7 has a eutectic alloy composition, like 63SnPb37 and other eutectic solder alloys such as 99.3Sn0.7Cu and 96.5Sn3.5Ag, melts and solidify at a single melting temperature and thus the resultant joints would be shiner as compared to joints formed by SAC305 solder, which is a non-eutectic alloy. The final appearance of the solder joints would also depends on the cooling rate of the soldering and also on the type of fluxes used, as there are fluxes which are especially formulated to create a matte finish.
Related Questions
- Does copper tube meet the NSF Standard 61, and do the solder joints contain lead, which could affect the quality of the water?
- It is noted that SCS7 joints are thinner as compared to other lead free solder such as SAC305. Why is that so?
- Why is the amount of dross reduced greatly after converting to SCS7 solder from other lead free solders?
