Temperature (C) 800 700 600 A 500 400 A Eutectoid temperature 1400 P B - T 1200 1000 800 600 300 M(start) 50% 200 M+A $400 M(50%) M(90%) 100 200 0 10-1 1 10 102 103 10% 105 Time (s) Temperature (F)