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Old 06-25-2009, 09:38 AM
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digger doug digger doug is offline
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Join Date: Jan 2008
Location: NW Pa
Posts: 11,697
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O.M.
Mild steel really doesn't get hard, but the scale formed
in cutting them with a torch is very hard.

Grinding off that scale is hard to do, can you drop them in
a cement mixer ?

At work we roto-blast, which is an extreme sandlbast
(airless) using steel shot. Unless you've got a line
on one of these, let's see what is avail to you.

Regular sandblasting works, do you have a little
cabinet unit in the shop ? You really only need to
concentrate on that cut edge.

I have machined these before, as an apprentice, and
we just went at them with carbide (negative rake)
in the lathe, scale flying everywhere.
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