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Here's a bolt story for you: Le Manfriend found pissweak tiny alu bolts on a fan housing.
After the initial WTF he thought that perhaps they were meant to be weak. After all if somebody overtorques things you want them to destroy two tiny bolts...not threads on steel housing that's welded to something.
On my cranks they can >>>>>>>>>>>>>>>>>>>>>>> though :)
JWestland
gbj_tester
You might as well say that aluminium alloy has no place on any safety-critical structure. You can't just drop aluminium into steel's place and expect it to work (even 7075T6 is considerably weaker than garden-variety 8.8 bolts), but each application should be assessed on its merits.