Thermo-physical properties for binary and multi-components alloys are important for controlling and designing metallurgical processes. However, it is difficult to get data from systems of a high order in terms of experience. On the theoretical level, different formalisms have been adopted for determining the structural, transport, and electronic properties, therefore, most thermo-physical data from calculations theoretical. Indeed, to choose the best substitute alloy, many criteria must be taken into account, in particular the surface tension, density, viscosity, and friccohesity. The Sn-Ag binary alloy is one of the most common lead-free solders. It is characterized by more interesting thermo-physical properties. In the present work, we have suggested novel empirical expressions of these physicochemical properties against the temperature where the corresponding obtained optimal coefficients are expressed with mole composition of tin which permit us to combine the two dependences and propose unified equations correlating thermophysical properties of the alloy as the function of both the independent variables the temperature and composition.

二元和多组分合金的热物理特性对于控制和设计冶金过程很重要。但是，就经验而言，很难从高阶系统中获取数据。在理论层面上，已采用不同的形式来确定结构、输运和电子特性，因此，大多数热物理数据来自理论计算。事实上，要选择最好的替代合金，必须考虑许多标准，特别是表面张力、密度、粘度和脆性。Sn-Ag 二元合金是最常见的无铅焊料之一。它的特点是更有趣的热物理特性。在目前的工作中，