Steel phase diagram

•Alpha Ferrite (α) = ΒCC (below 912 degC)

• Austenite (γ) = FCC (above 727 degC at 0.76 wt%C)

•Gamma Ferrite (δ) = BCC (between 1394 and 1538 degC)

• Cementite (Fe3C) = solid solution (6.7 wt%C)

•All Phases contain carbon