A steel plate contains 0.82% C and the surface is going to be carburized. The carburization...

Question:

A steel plate contains 0.82% C and the surface is going to be carburized. The carburization takes place such that the surface composition is 3.0% C, how long will it take to have 2.4% C at a depth of 0.55 mm into the plate at a temperature of 560 °C?

erf(2) 7 erf(x) Z erf(2) 0 0 0.55 0.5633 1.3 0.9340 0.025 0.0282 0.60 0.6039 1.4 0.9523 0.05 0.0564 0.65 0.6420 1.5 0.9661 0.10 0.1125 0.70 0.6778 1.6 0.9763 0.15 0.1680 0.75 0.7112 1.7 0.9838 0.20 0.2227 0.80 0.7421 1.8 0.9891 0.25 0.2763 0.85 0.7707 1.9 0.9928 0.30 0.3286 0.90 0.7970 2.0 0.9953 0.35 0.3794 0.95 0.8209 2.2 0.9981 0.40 0.4284 1.0 0.8427 2.4 0.9993 0.45 0.4755 1.1 0.8802 2.6 0.9998 0.50 0.5205 1.2 0.9103 2.8 0.9999

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