Question: A 0.80% C steel must operate at 950 C in an oxidizing environment for which the carbon content at the steel surface is zero. Only

A 0.80% C steel must operate at 950 °C in an oxidizing environment for which the carbon content at the steel surface is zero. Only the outermost 0.02 cm of the steel part can fall below 0.75% C. What is the maximum time that the steel part can operate?

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