Fe-C Phase Diagram

Interactive Iron-Carbon phase diagram. Click or drag on the diagram, or adjust the sliders below to explore phase stability, microstructure, and composition at any point.

L + δL + γL + Fe₃Cδγ (Austenite)γ + αγ + Fe₃Cα (Ferrite)α + Fe₃Cα-FeLiquidusA₃AcmA₁ (727°C)Eutectic (1147°C)ABCDEGHNPSK02004006007278001000114712001495160000.511.522.11344.3566.69Carbon Content (wt%)Temperature (°C)

Phase Legend

αα-Ferrite
γγ-Austenite
δδ-Ferrite
Fe₃CCementite
LLiquid