Constantan is a Nickel-Copper based alloy wire that has a high resistivity and is mainly used for thermocouples and electrical resistance heating.$$\Rightarrow X_1=Y_4=Z_8$$
Brass is an alloy made primarily of copper and zinc. It is used in musical instruments.$$\Rightarrow X_2=Y_8=Z_3$$
Rolled gold is a composition of Copper and aluminium. It is mainly used in making cheap ornaments. $$\Rightarrow X_3=Y_1=Z_7$$
Invar is a single-phase alloy, consisting of around 36% nickel and 64% iron. It is used in making measuring tape. $$\Rightarrow X_4=Y_7=Z_1$$
Stainless steel is an iron alloy with added elements such as chromium, nickel, silicon, manganese, nitrogen, and carbon. It is mainly used in making domestic utensils. $$\Rightarrow X_5=Y_2=Z_2$$
Solder is a metal alloy usually made of tin and lead. It is used in soldering. $$\Rightarrow X_6=Y_5=Z_4$$
Type metal is an alloy of lead, tin, and antimony. It is used in printing types. $$\Rightarrow X_7=Y_3=Z_6$$
Magnalium is an aluminium alloy with 5% magnesium and 95% aluminium. It is used in Air space. $$\Rightarrow X_8=Y_6=Z_5$$
$$\mathbf{\Rightarrow \ \therefore X_1=Y_4=Z_8,\ X_2=Y_8=Z_3,\ X_3=Y_1=Z_7,\ X_4=Y_7=Z_1,\ X_5=Y_2=Z_2,}$$
$$\mathbf{X_6=Y_5=Z_4,\ X_7=Y_3=Z_6,\ X_8=Y_6=Z_5}$$