The Ford Barn

AlanD · 02-26-2014, 12:30 PM

Ok, I have read many times that sandblasting sheet metal causes it to warp, and I proved it because I did it. But I want to know why it warps.
I was always told that it warps because the heat generated in the metal from the sand blasting on it. This is where I loose belief.

I was using a small harbor freight blaster on a 55 degree day, so the metal is staying pretty cool, certainly not hot. Now on the same day I used a wire wheel on another piece of sheet metal and got it almost too hot to touch, but no warpage. I should get as much or more warping from the wire wheel, but it doesn't. Why not?

02-26-2014, 12:30 PM	#1
AlanD Senior Member Join Date: Feb 2012 Location: Louisiana Posts: 117	Warping sheet metal - sandblasting Ok, I have read many times that sandblasting sheet metal causes it to warp, and I proved it because I did it. But I want to know why it warps. I was always told that it warps because the heat generated in the metal from the sand blasting on it. This is where I loose belief. I was using a small harbor freight blaster on a 55 degree day, so the metal is staying pretty cool, certainly not hot. Now on the same day I used a wire wheel on another piece of sheet metal and got it almost too hot to touch, but no warpage. I should get as much or more warping from the wire wheel, but it doesn't. Why not?