Re: [CAD_CAM_EDM_DRO] 4130 4140 how to heat treat ?

The Machinery's Handbook says to quench chrome moly alloys in oil. The only
difference between 4130 and 4140 is carbon content.

Having material on hand weighs heavily in the decision for most of us. The
4130 should work if you are careful. Email me back in a few days if nobody
comes up with the drawing temp. I left all my teaching materials at the
school when I resigned but can probably talk someone out of what you need.

Doug

----- Original Message -----
From: smcdonal <SMCDONAL@...>
To: <CAD_CAM_EDM_DRO@egroups.com>
Sent: Saturday, June 17, 2000 1:49 PM
Subject: Re: [CAD_CAM_EDM_DRO] 4130 4140 how to heat treat ?


> Doug Harrison wrote:
> 4140 is what I had on hand and therfore was FREE. How do I harden 4130?
> Do I quench in oil or water. Thanks to all doe the help on this!
> Second question does anyone here have the temp for drawing the 4130 or
> 4140 back to 52 RC after it is hardened?
>
> Regards
> Stan
>
>
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