[modeleng] Re: Model Engineers Laser Company

At 11:17 PM 7/20/07 +0100, you wrote:
>Ordinary Mild Steel (MS) can't be hardened by heating/cooling(except by
>using case-hardening methods) - Andy

Andy,
    In my experience it can, at least when the steel has been oxy/acetly
flame cut.  I had some 1" hot rolled mild plate flame cut a few years ago
and found that almost 1/8" of material at the cut edges was glass hard and
ruined HSS cutters.  I assumed the oxygen and/or acetylene somehow altered
the skin near the cut and I ended up having to have the pieces annealed.  I
can't speak to any other combination of materials.

Regards,
Harry

MODEL ENGINEERING DISCUSSION LIST.

To UNSUBSCRIBE from this list, send a blank email to, 
modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.

Other related posts: