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3. In the steels below calculate the carbon content and comment whether the steel is hypo- or hyper- eutectoid. (a) Steel 1, containing 8% cementite and 92% ferrite at room temperature (b) Steel 3 containing 18% cementite and 82% ferrite at room temperature (c) Steel 3 containing i 8% pearlite and 82% proeutectoid ferrite at room temperature (d) Steel 4 containing 94% pearlite and 6% proeutectoid cementite at room temperature

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1000 900 L 800 Y+Fe3C 2 700 600 500 α+Fe3C 400 0.0 0.5 1.0 MASS PERCENT C 1.5

The steels below calculate the carbon content and comment whether the steel is 

hypo- or hyper- eutectoid. 

(a) Steel I, containing 8% cementite and 92% ferrite at room temperature 

(b) Steel 3 containing 18% cementite and 82% ferrite at room temperature 

(c) Steel 3 containing 18% pearlite and 82% proeutectoid ferrite at room temperature 

(d) Steel 4 containing 94% pearlite and 6% proeutectoid cementite at room 

temperature. 
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