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Old 09-10-2017, 06:07 PM   #4
eagle
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Join Date: Aug 2011
Location: Eagle Bend, MN
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Default Re: Stainless exhaust pipe rattle won't stop!

In general (10-6 in/in/ deg F)

Carbon Steel (1020) 6.7
Grey cast iron 6.7
Stainless (304) 10
Aluminum 13 Highest
Copper 9.3
Manganese-bronze 11.2
Titanium 5.0 lowest
Gold not listed in the book I checked

In reality these numbers are just guidelines, the thermal expansion of can vary quite a bit depending on the alloy. Silicone for instance reduces the thermal expansion of aluminum significantly. The thermal expansion rate also changes somewhat depending on the temperature of the metal.
(Googled)
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