Iron Carbon Phase Diagram example problem

Question 4a, from the University of Toronto Dec 2010 MSE101 Final Exam.

[@yigitcan824]

Professor I have a question .Maximum solubility of carbon in FCC iron is 2%
but steel is produced below 1.4% carbon and cast iron is produced between 3-4.5% carbon. Why?

[@gauharali3653]

hardward student

[@richjbarnett]

I get this to be 1.62% Carbon???

[@mustafakhalil007]

its very interesting lect. Prof Ramsay, good luck

[@luizmartinssouza7867]

Authors define the eutectoid point of the FeC diagram with different% C (example: 0.77%, 0.86% and 0.83%). What is correct value?

[@fnotrade]

Luiz Martins Souza all correct

[@mentor1324]

0.76

[@HiddenShaco]

scotty boi

[@stefanshi3577]

There is 760 grams of ferrite and 1 kg of hyperutectic steel, isn't the weight percent of ferrite 76 instead of 0.76? @Scott Ramsay

[@freshcaffe]

1 kg equals 1000 grams. So 760 grams means 0.76 kg.

[@SamratAllabadi]

760g was ferrite's amount, how can u equate it to carbon's amount?

[@GenericMedusa99]

[@orwah999]

thank you very much sir.

[@mbbag1980]

clear as mud

[@projetointegrador7499]

Thank You vey much!

[@RohanRonQM]

Your Welcome