Chemistry — Phase: Pb–Sn eutectic
Classic binary eutectic system used to teach solder behaviour.
Make it your own.
title "Pb-Sn eutectic"
type binary
basis weight
component A "Pb" melting 327
component B "Sn" melting 232
// Eutectic 61.9 wt% Sn at 183 C; terminal solubility at that
// temperature is 19.2 wt% Sn in Pb and 2.5 wt% Pb in Sn.
eutectic 0.619 183
solvus 0.192 0.975
region "Liquid" at (0.45, 0.93) color teal
region "alpha (Pb-rich)" at (0.08, 0.42) color blue
region "beta (Sn-rich)" at (0.95, 0.38) color purple
region "alpha + L" at (0.36, 0.40) color amber
region "beta + L" at (0.80, 0.34) color amber
region "alpha + beta" at (0.55, 0.14) color slate