3. Using Figure 13-6, calcusate che perexemtage of or phasic present at room tempexature in a 40 so I3 allay- 8. Using Figure 13-6, calculate the percentage of ettoctic present'in an alloy of 40 . 13 at 20 degrecs. 9. Whhat is a eutectoid? Sectivm 13.2 10. Cementite is a. Fe2O b. FeC (1) FeSC4 c. FCD c. Fe3C f. Fe3O4 Heat Treatment of Steels 8. a phase at 750=cacb=2252212=1710=58.8% : liguid =caba=225125=177=41.2% in att alloy with 127 B in an allog will 75% B igure 136 7if of bie lines on prase dibgrami to calculate relative percentages of phases that are present \$partitular temperatare 3. Using Figure 13-6, calcusate che perexemtage of or phasic present at room tempexature in a 40 so I3 allay- 8. Using Figure 13-6, calculate the percentage of ettoctic present'in an alloy of 40 . 13 at 20 degrecs. 9. Whhat is a eutectoid? Sectivm 13.2 10. Cementite is a. Fe2O b. FeC (1) FeSC4 c. FCD c. Fe3C f. Fe3O4 Heat Treatment of Steels 8. a phase at 750=cacb=2252212=1710=58.8% : liguid =caba=225125=177=41.2% in att alloy with 127 B in an allog will 75% B igure 136 7if of bie lines on prase dibgrami to calculate relative percentages of phases that are present \$partitular temperatare