My choice of Selected elements:

Al, Cu, Fe, are common elements. From the internet I wrote this. At least two costly elements should be taken, because here we don’t have much choice between elements.

Comparison of Low cost elements

Element Mechanical Properties Electrical Resistivity

Thermal Conductivity(Wm-1K-1)

StructureYoung modulus (GPa)

Shear modulus(GPa)

Bulk modulus(GPa)

Poisson’s ratio

Mohs hardness(MPa)

Zn 108 43 70 0.25 2.5 59 x 10-6 ohm-m 116 HexagonalCd 50 19 42 0.3 2 72.7 x 10-6 ohm-m 96.6 HexagonalSi 185 52 100 0.28 7 103 ohm-m 149 CubicMg 45 17 45 0.29 2.5 43.9 x 10-6 ohm-m 156 HexagonalCa 20 7.4 17 0.31 1.75 33.6 x 10-6 ohm-m 201 FCCLi 4.92 4.2 11 - 0.6 92.8 x 10-6 ohm-m 84.8 BCC

In my point of view Silicon is obvious choice, because high entropy alloys have structural as well as high temperature applications. Its resistivity is very good and thermal conductivity is slightly high compared to Zn but it is sufficient.

Al, Cu, Fe, Si, Zn are fixed. [5]

Cr/Ni/Co/Ag/Ti --- Take two depends on the cost [6]Cd/Mg; both are almost same in properties also, [7]

Ag [8] (Silver oxide around 3500-5000 rupees)

Because of the thermal conductivity and resistivity Li can be used, since it is an alkali metal and relatively low cost (If you want to take a chance). [9]