Anthony wrote:

"bw" wrote in
:




Any mild steel can be case hardened.



We typically use 8620 for case hardened parts.

I'm going to agree.

8620 is very easy to machine and any heat treater can handle it. The
result is boringly predictable. As I recall, a typical surface
hardness is in the 45 to 50 Rc range. The surface is very durable,
often used for wear surfaces of Gears, shafts and seal faces.

My experience with Kasenit is that the result may be unpredictable. I
once had a part shatter because the case was too deep. I'm sure that
has a lot to do with my clumsy and inexperienced methods. But given
the alternative of 8620, I don't see any reason to spend the time and
expense of honing my heat treating skills.

If you need small quantities, try eBay:

http://makeashorterlink.com/?N5F922F4B

George.