Quote Originally Posted by fbronco86
I bet it wont change more that .001-002 size od wise. The problem with heat treating and stuff is warping. Round matl generally has high stresses around the OD so when you machine on them or heat treat them they tend to wanna move on you. I would not worry about the size changing on you but I would have it supported/laying flat when you heat treat.

Also make sure you wrap that dude up and put some graphite(sp) with it to keep it from getting all messed up.

a lot of what causes the warping during heat treat is the lying flat during quench. when you drop it in and it lies on the bottom of the tank, heat dissapates at a different rate on one sdie than the other. the best way is to suspend it in the fluid so the part quenches evenly all the way around.