Please help: how to eliminate Stud Welding cracks?
Please help: how to eliminate Stud Welding cracks?
(OP)
Hi,
I tried to weld 0.25' 304SS stud on p11, p22 and carbon steel with no PWHT (DA Stud Welding). the welds look good, passed hammer test and with very good tensile strength (only the stud brakes, not the weld) but when I cross-section the samples (that haven't gone through hammer test), I find cracks in the weld, cold cracks from solidification perhaps? (directional cracks). Can you please advice how to eliminate these cracks with no PWHT?
Attached is an example of the weld cross-sectioned.
Many thanks,
Best Regards,
S.
I tried to weld 0.25' 304SS stud on p11, p22 and carbon steel with no PWHT (DA Stud Welding). the welds look good, passed hammer test and with very good tensile strength (only the stud brakes, not the weld) but when I cross-section the samples (that haven't gone through hammer test), I find cracks in the weld, cold cracks from solidification perhaps? (directional cracks). Can you please advice how to eliminate these cracks with no PWHT?
Attached is an example of the weld cross-sectioned.
Many thanks,
Best Regards,
S.





RE: Please help: how to eliminate Stud Welding cracks?
http://www.bssa.org.uk/topics.php?article=121
RE: Please help: how to eliminate Stud Welding cracks?
For multiple hundreds, buy the 309 studs metengr recommended, and stud-weld them.
Then fire the estimator that didn't know that 304 will not weld directly to carbon steel and failed to notice the large price difference between 304 and 309 studs.
RE: Please help: how to eliminate Stud Welding cracks?
RE: Please help: how to eliminate Stud Welding cracks?
Your example of the cross-welded section did not post.
Mike McCann
MMC Engineering
RE: Please help: how to eliminate Stud Welding cracks?