% Shear for Impact test

[MoReSo]

I’m having a mental block with respect to impact testing of ASME IX weld procedures. If we see a WPS which reports 10% shear, is this acceptable for ASME IX? I know this values is quite low (alarmingly so), but can we reject the WPS do to the low values?

The example WPS template ASME provides (QW-483), includes the %Shear for impact tests, however I cannot find the acceptable values. Per QW-171.2 acceptance shall be in accordance with that Section specifying impact requirements, so it seems to be up to the design code (ASME B31.3, VIII, etc).

If 10%shear is reported for a WPS used per ASEM VIII, what is your opinion on the acceptance test data (since ASME VIII is only concerned with absorbed energy and lateral expansion)?

MRSohrabi;
Material and Welding Eng.

 

[metengr]

You need to have the CVN impact value reported and/or mils lateral expansion, if applicable. The % shear is not a reported variable for WPS impact qualification. Go back to the test lab and have them report the CVN values and mils lateral expansion.

 

[metengr]

The % shear is not a reported variable for WPS impact qualification

for ASME Section VIII, Div 1 application.

 

[weldstan]

The % Shear is quite often misreported and under reported. This is especially true when relatively high absorbed energy values are obtained with low shear reported; e.g., 50+ ft-lbs with 10% shear.