case-hardening vs case coloring
Posted: Tue Feb 01, 2011 4:34 pm
What is the difference between case-hardened and case-colored gun parts and how are they processed? Some say there is a significant difference.
This is one of the more basic explanations I've found. The colors somewhat depend of the carbon source used in the hardening prosess.
http://en.wikipedia.org/wiki/Case_hardening