[MW:25027] impact results - UHT material welding

Dear colleagues, 

I hope this email finds all you well

Project: ASME VIII- Pressure vessel - material ASME SA517 Gr B. Thickness 9,5 mm.

 I have to qualify a WPS for welding ASME SA517 - B with impact requirements at -40 C, 

Also is required PWHT, and my first results of impact test @-40C of test plate were very low. (lateral expansion less than 0,2mm and energy less than 20J)

The declared Values of certificate of consumable is 75J @ -73C  !!!

Can the presence of PWHT changes so much the values of impact test? (certificate´s value is "as welded" and my results is "after PWHT".

Any help will be very useful. 

Thanks a lot, 

Fernando Lescovar Neto (IWE)

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