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Skaning 02-21-2013 20:22:56 184.21.242.202 Report to Moderator	Actually, what happens when you heat and quench steel is the metal goes through changes in it's crystal structure and the amount of carbon in the steel to begin with governs how it hardens. Low carbon steels won't harden, higher ones will, generally the more carbon, the harder the quench will take it. The hardened steel is stronger but more brittle. Adding other metals like chrome, nickel, moly when the steel is made will change the strength and toughness of the steel and how it hardens. What you quench it in has no bearing on carbon content. That's built into the steel at at the mill. [Reply]   [No Email]
Harvey 2 02-22-2013 06:17:21 74.128.149.135 Report to Moderator	Re: Cutting oil in reply to Skaning, 02-21-2013 20:22:56   Thanks to all who contributed to the question. I failed the course in metallurgy at the school of hard knocks. [Reply]  [No Email]