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It is noted that SCS7 joints are thinner as compared to other lead free solder such as SAC305. Why is that so?

April 26, 2017Free joints lead noted sac305 scs7 solder thinner

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It is noted that SCS7 joints are thinner as compared to other lead free solder such as SAC305. Why is that so?

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A9. This is due to intrinsic properties of SCS7, as it has a lower surface tension and higher fluidity than SAC305 at normal wave soldering process temperatures. Although SCS7 joints are thinner as compared to SAC305 joints, pull / shear tests comparison data have shown SCS7 joints to have comparable strengths as compared to SAC305 solder joints.