Friday, October 7, 2022

[MW:33560] PWHT time

The following is an exam question. Please guide how to do it

A  one and Half inch of material has to be PWHTed from 600 F to 1350  and shall be kept at 1350 F for 6 hours. It has to be cooled down back to 600 F. If the rate of heating and cooling is 500F per hour per inch  , what is the total time for PWHT.  Do not consider heating the material up to 600F in the calculation

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