View Full Version : Rule of thumb for expansion rate of steel?

12-24-2008, 12:08 PM
I'm wanting to shrink on a 4140 sleeve to fix a motor shaft and was curious what the expansion rate of steel is. Hoping to do some Jethro Bodine cypherin' and goesintas to see if it'll work. I have the factor for aluminum written down in my notebook (roughly .0013% per 1 degree F) but don't have it for steel.

12-24-2008, 12:48 PM
Here ya go....


12-24-2008, 01:51 PM
It's about 6 millionths of an inch per inch per degree F...about half that of aluminum.