Quote:
Originally Posted by ironworks
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The frame side of the weld acts like a huge heatsink and depending on how the weld was struck, the speed that the bead was laid, and the "tapering off" of the heat at the end of the bead, the localized heat affect zone might have caused the framerail side to be too brittle. The bracket would likely get hotter during welding, and a sharp end of the weld heat might cause the framerail to cool too quickly from an already lower temperature immediately around the weld... if I had to guess. This kind of heat affect zone is usually much more critical/noticeable in aluminum.
Quote:
Originally Posted by ironworks
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I'd say the crack started at the welded-on bung for reasons I stated above and propogated from all the torque from the upper link trying to pull the bracket away.