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Re: Bone Charcoal Color Case Hardening Question CMWill #111289 09/05/08 07:49 PM
Joined: Dec 2001 Posts: 12,743 Lynchburg TN 2-piper Sidelock
2-piper Sidelock Joined: Dec 2001 Posts: 12,743 Lynchburg TN	Being 4140 I would guess they are not Case "Hardened" at all but simply colored. I believe colors can be produced while staying below the critical temperature required for the actual hardening of the case. This would normally not be done on a plain low carbon steel frame, but is a standard practise for an alloy steel frame. Miller/TN I Didn't Say Everything I Said, Yogi Berra

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