[MW:12516] WPS Heat treatment condition

Dear All,

Regarding heat treatment ,

I have P1 to P8 PQR with following heat treatment,

 

Loading temperature :- 350  ̊C

heating rate : 70   ̊C  /hr

Socking temperature: 620  ̊C

Cooling rate : 70  ̊C/hr

Unloading temperature: 350  ̊C

 

our job requirement is

Loading temperature :- 350  ̊C

heating rate : 70  ̊C/hr

Socking temperature: 670  ̊C

Cooling rate : 70  ̊C/hr

Unloading temperature: 350  ̊C

 

Is it possible to use above PQR for same job if yes please tell me the reference in section IX. or this not possible then why because above all temperature below lower critical temperature..

please advice your valuable experience..............

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