The solder alloys with the surface layers of the parts ... solders is considerably less than that of copper, varying with composition between approximately 9 percent and 13 percent for soft ...
To demonstrate creep behavior at room temperature, we can use 60/40 solder that contains 60 wt% Sn (tin) and 40 wt% Pb (lead). The phase diagram for the Pb-Sn alloy system is shown below, and the ...