Chemistry — Phase: iron–carbon (simplified)
Austenite, ferrite and pearlite regions of the Fe–C system.
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title "Iron-carbon (simplified)"
type binary
basis weight
component A "Fe" melting 1538
component B "Fe3C" melting 1227
// The two reactions this diagram is taught for, stated as fractions of
// the 6.67 wt% carbon that is cementite: the eutectic at 4.3 wt% C and
// 1147 C, and the eutectoid at 0.76 wt% C and 727 C, which is the one
// that makes pearlite.
eutectic 0.645 1147
eutectoid 0.114 727
region "Liquid" at (0.5, 0.94) color teal
region "Austenite (gamma)" at (0.30, 0.42) color amber
region "Ferrite (alpha)" at (0.05, 0.30) color blue
region "Austenite + liquid" at (0.45, 0.60) color slate
region "Pearlite + cementite" at (0.62, 0.16) color purple