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Originally Posted by TimTaylor
Lets assume mild steel or similar ferrous alloy. The thermal coefficient of linear expansion is approx. 0.0000073" per inch of length per deg F. Using BITS's numbers (65-120) the net change in length of a 88" chain would be would be approx. 0.035332" - hardly significant. For aluminum it would be approx. 0.059532", brass would be approx. 0.050336".
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My point exactly. That .03 - .06 inch variation is the most plausible variation that I can come up with, barring some kind of abuse of the chain itself.