Quote:
Originally Posted by 2004bmwx53i
At anytime you're fed up with this thread, just stop responding.
As a matter of curiosity, how did you arrive at 88 N.m as the torque at yield. Shouldn't we consider Proof load rather than yield.
Proof load for 10.9 steel is 830 MPa. Effective tensile area (at the root of the thread) is about 50 mm2. So 830 x 50 is 41500 N (41.5 KN Clamping Force) Similarly for M12, it works out to be about 53 KN. Anything above this will cause permanent deformation. So we're at the limit already.
Agree?
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good catch I used tensile vs. yield.
The correct number would be 122*94/78=147 N·m for yield. (20% higher than proof).
The proof strength is 0.83 of yield not 0.75.
