The phase diagram ... eutectic invariant reaction between these two constituents. At the eutectic temperature of 183 C, three phases exist in equilibrium: (Pb) with the composition Pb-19 wt % Sn, (Sn) ...

The phase diagram shown is a partial diagram for the Aluminum-Copper system showing the aluminum rich end. The composition of a typical structural alloy is shown by the vertical green bar on this ...