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Iron-Carbon Phase Diagram

Explore steel and cast iron microstructures based on composition and temperature.

State Variables

Pure FeSteel (<2.14%)Cast Iron

Current Phase

Austenite + Cementite

Proeutectoid cementite forming at austenite grain boundaries.

Key Temperatures

  • A1 (Eutectoid): 727 °C
  • Eutectic: 1147 °C
  • Pure Fe Melting: 1538 °C

Interactive Fe-C Diagram

Microstructure Visualizer

Microstructure View (approx 50µm width)