[MW:32383] PREHEAT TEMPERATURE

Dear Experts,

The preheat temperature shall not be less than 55 deg. C as per QW-406.1 but  not specified a maximum how much it can be from the temperature noted in PQR as preheat temperature is minimum temperature and interpass temperature is the maximum temperature.

My question , Is there any limitation to increase preheat temperature than mentioned in PQR. suppose PQR temperature is Ambient, say 38 deg. C, can we increase preheat temperature to 204 deg. C.  I have a qualified procedure of P6 material at ambient temperature 38 deg.C now I have to include preheat temperature.

Thanks in advance for your expert opinion.

Manoj.

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