Question: 8 . 4 At 9 0 0 C , what is the time required to carburize a steel with an initial composition of 0 .

8.4 At 900C, what is the time required to carburize a steel with an initial composition of 0.2% carbon to 1% carbon at a depth of 0.2 mm ? Assume a constant surface concentration of 1.4% carbon due to the carburizing atmosphere.
Answer: 14900 s.
8 . 4 At 9 0 0 C , what is the time required to

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