phase at temperatures at intervals of 30 °C from 570 to 660 °C. Transformation times were chosen sufficient to
ensure complete transformations, without appreciable spheroidization. All the specimens after the heat treatments
were metallographically polished and then etched with 4% nital for microstructural observation by optical
microscope. Then, interlamellar spacing and pearlitic colony size were measured by random intercept methods.
Besides, tensile test was carried out on a WAW-200 testing machine at a crosshead speed of 10 mm/min at ambient
temperature in air and using standard specimens (gauge diameter 5 mm, gauge length 25 mm).