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How good is the steel in Buck knives? I noticed one of the lock back folders has 420. How does that steel rate? Thanks.
The earlier 110's came with 440c and 425m steel IIRC, before the switch to 420.
Buck's tend to do very well for what some consider lower end steel.
Two words... Paul Bos
He is THE MAN when it comes to heat treating
Since getting the knife bug I've read every article and book I can find and watched many hours of knife making DVDs. The common comment and observation is that Heat Treatment is more important than the type of steel assuming its a good quality blade steel to begin with.
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That is an oversimplification. Heat treatment only goes so far. You need both good steel and good heat treatment. (And you are right, above all you need good edge geometry.)
Given two blades with the same edge geometry, a steel with a lower carbon content can outperform steel with a higher carbon content IF the lower carbon steel is heat treated to a high hardness and the higher carbon steel is heat treated to a low hardness. But heat treat them both to the same hardness and the higher carbon steel will far outperform the lower carbon steel.
Example:
There are some producers that run their AUS8 to a lower hardness than Buck runs their 420HC, and I would bet Buck's 420HC will hold an edge better. But, Buck 420HC does not out-perform AUS8 in edge retention if both are taken to the same hardness. (I have tested blades of equal hardness and I know this to be a fact.) And AUS8 can be hardened to a higher hardness than 420HC. So there are lots of AUS8 blades out there that outperform Buck 420HC in edge retention.
You need both good steel and good heat treat.