Eutectoid temperature

Temperature at which the eutectoid is formed.

In the iron-carbon phase diagram the eutectoid temperature is at 723 °C for the metastable and at 738 °C for the stable system and corresponds to the P-K line (P-K`) with a C content of 0.02 - 6.67 %, the eutectoid point S is at 0.80 % C for the metastable system.

Additional references:

Eutectoid alloy
Eutectoid steel