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**Mike Irwin** · May 6, 2012, 09:21 AM

I don't buy that hog. The metal around the void would contract away from the center point of the cold effectively making it larger.

A simple test would be easy. Take a piece of mild steel and drill a shallow hole in it say 3/32 of an inch.

Measure the hole with a caliper.

Then throw it in the freezer for a day and measure again.

Then allow the piece to come back to room temp. Measure it again as a control, then throw it in a 300few deg. Oven for a couple of hours and then measure the pore again.

May 6, 2012, 09:21 AM	#19
Mike Irwin Staff Join Date: April 13, 2000 Location: Northern Virginia Posts: 41,380	I don't buy that hog. The metal around the void would contract away from the center point of the cold effectively making it larger. A simple test would be easy. Take a piece of mild steel and drill a shallow hole in it say 3/32 of an inch. Measure the hole with a caliper. Then throw it in the freezer for a day and measure again. Then allow the piece to come back to room temp. Measure it again as a control, then throw it in a 300few deg. Oven for a couple of hours and then measure the pore again. __________________ "The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza Baby Jesus cries when the fat redneck doesn't have military-grade firepower.