Originally Posted By ambalamps:
Anywhere close to a tac or mig weld ?
No, not even remotely in the same universe.
fuses the parts together. A bond, whether with epoxy, brazing, or soldering, adheres the parts together through weak atomic and mechanical links.
JB Weld is filled epoxy. Epoxy is a type of plastic, fine for some applications, completely inappropriate for others.
Bonded joints should be designed to transfer loads in shear. They are miserably poor under peeling loads, and only terrible under tension.
of a bond is more complicated than "is it strong"; that's nonsense. What is important is the strength of the adherend (the parts being bonded), the adhesive (the glue or brazing material), and the adhesive strength, the strength of the bond lines. Any one of those can be the weak link.