[Shop-talk] torque wrench calilbration

[BJNoSHOV8]

E is a function of the metallurgy.  E for steel and steel alloys is in a 
fairly narrow range.
I is a function of the shape of the "beam", and is actually the property 
that could change, through wear, corrosion, damage, etc.


>> After
>> all, PL^3/3EI is the same now as it has ever been.
> Only if E is a constant.  I suppose changes in E would come under the
> category of either not manufactured properly or damaged; and yet the only
> way to tell may be to check the calibration.