{Equilibrium proportion P, this is the proportion which is reached at a constant temperature after an infinitely long time:P is also the austenite proportion in the case of extremely slow heating. It is determined by the fact that the free enthalpy of the pearlite-austenite mixture is a minimum at the temperature T for this particular proportion P. It can be read from an iron-carbon diagram (incorporating effects of alloying elements).}
above {Equilibrium ....} read from journal paper. My question is how to find P from the iron-carbon diagram?? Explain in detail if possible with example. Thanks