Is bend test of welded overlay req'd by ASME?
Is bend test of welded overlay req'd by ASME?
(OP)
Hi,
A carbon steel pressure vessel to be manufactured per
ASME Section IX requirements needs overlay of Cu/Ni 70/30.
The vessel case is manufactured and then the overlay
is applied. The overlay layer is not stressed by manufacturing procedures, beyond welding shrinkage stresses. It is stress relieved after overlay.
Test specimens with overlay fail upon bending.
Is bend testing for welded overlay really required per ASME Sect. IX?
Thanks.
A carbon steel pressure vessel to be manufactured per
ASME Section IX requirements needs overlay of Cu/Ni 70/30.
The vessel case is manufactured and then the overlay
is applied. The overlay layer is not stressed by manufacturing procedures, beyond welding shrinkage stresses. It is stress relieved after overlay.
Test specimens with overlay fail upon bending.
Is bend testing for welded overlay really required per ASME Sect. IX?
Thanks.





RE: Is bend test of welded overlay req'd by ASME?
RE: Is bend test of welded overlay req'd by ASME?
RE: Is bend test of welded overlay req'd by ASME?
RE: Is bend test of welded overlay req'd by ASME?
Thank you all.
Base metal - 3/8" thick SA-516-70
Buffer material 2 layers of ERNiCu-7
Processes: SMAW and SAW
The side bend tests fail because the open discontinuities are greater than 1/16".
SAW - the cracks are in the ERCuNi layers.
SMAW - the cracks are close to the interface of ENiCu-7 and ECuNi
Any hints? Thanks,
http://www.welding-advisers.com/
RE: Is bend test of welded overlay req'd by ASME?
RE: Is bend test of welded overlay req'd by ASME?
Temperature is taken care of.
We will try now to limit iron dilution, in case it is the reason for bend test failures.
Thanks again.
http://www.welding-advisers.com/
RE: Is bend test of welded overlay req'd by ASME?
RE: Is bend test of welded overlay req'd by ASME?
I started corresponding with Sam and got a nice answer.
The problem is still under investigation but I hope the solution will be found.
Best regards,
http://www.welding-advisers.com/