Thursday, August 19, 2010

[MW:6582] Effect of longer holding temperature and time on mechanical proerties

Dear All,
 
Good day.
 
what will be the effect of longer holding  time  and higher holding temperature  during PWHT  on Imapct, tensile and hardness properties of  Carbon Steel and low alloy steels.
 
Example: As per ASME  SECTION VIII DIV 1- UCS 56 ( TABLE UCS-56),
For 25 thk  P1 Material Minimum holding temperature is  595 deg. celcius and holding time is 1 hour.
 
If during PWHT for the above material(P1)  the holding temerature exceeds to 650 deg celcius and holding temperatue exceeds to 2 hour, what will be the effect on  Imapct, tensile and hardness proerties.

Thanks in advance for your valuabale reply.

 
Regards
 
Asad Azmi

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