Posted by Indiana Ken on February 22, 2016 at 18:30:52 from (66.249.235.138):
In Reply to: Re-Torquing head bolts posted by JRSutton on February 22, 2016 at 07:05:18:
Quoting Removed, click Modern View to see
No need to imagine: The effect of temperature is small however, the Modulus of Elasticity, denoted as "E", does decrease with temperature increases. For steel the effect would be an approximate 1.6% reduction, going from 100 degrees F to 300 degrees F. That means to maintain the same clamping load at 300 degrees the bolt would need to be stretched an additional 1.6%. At 1000 degrees you would need to stretch the bolt an additional 18%.
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