In this research study the influence of Indium in metal Sn-NN3Ag-NN0D5Cu type: unleaded soldering to help improve the overall properties of metals, soldering, and to reduce the melting point. The formula used in the study is composed of 4 different formulas are Sn-NN3Ag-NN0D5Cu, Sn-NN3Ag-NN0D5Cu-NN0D5In, Sn-NN3Ag-NN0D5Cu-NN1In and Sn-NN3Ag-NN0D5Cu-NN2In, respectively, as a result of thermal analytical with DSC and mechanical properties testing by UTM found that formula there In SAC305 2.0 + lower melting point and ช่.ZIP 64 wayon melting when the quantity of indium and with increased tensile strength, but the percentage dropped to. Can increase the hardness of a metal soldering. After checking the structure of the metal work piece soldering SAC305 mix + xIn found that when increasing Indium replenished can improve the structure, there are more comma-separated value, resolution. As a result, increased hardness values.
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