On 19/06/2010 22:40, Andy Dingley wrote:
On 19 June, 18:25, wrote:

Moving on to the case hardening powder you have, this will consist of
animal bones.

No bones in it - hoof and horn instead.

Bone is a poor carbon donor and a good phosphorus donor, which is
generally a bad thing in steels.

Thanks for the reminder, it's been a long time since I learned about it.

Dave