Posted by Doug in CO [68.177.208.75] on Friday, September 14, 2012 at 18:35:28 :
In Reply to: Re: hardened steel posted by wayneh [68.55.55.71] on Friday, September 14, 2012 at 18:18:03 :
Interesting you mention the Rockwell Scale. Also, there is a Rockwell B and C. B scale is for less hard and C scale is for real hard metals after heat treat. We used to make header tooling and screwdriver bits. We used C scale to about 60 to 64 for the header tooling and THAT'S hard.