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River's Cutlery added blog Other
2026-10-22 07:17:15 -

About the K390 Steel of Some Spyderco Knives
Some Spyderco knives, like the Paramilitary 2, Dragonfly 2 and Delica 4, are made with a really unique steel alloy called K390, sometimes referred to as K390 MICROCLEAN. But what is this steel alloy, and what does it offer? Here’s your primer. K390 Chemistry K390 was developed as an alternative to CPM-10V, which was renowned for its concentration of vanadium carbides, which...

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River's Cutlery added blog Other
2026-11-12 06:18:29 -

Forcing a Patina on Spyderco Knives with K390 Steel
Let’s say there are some Spyderco Knives in your collection that have K390 steel blades, such as an Enuff 2. This is a great steel and one that is very tough and hard. It will hold an edge for a long time. There is just one real tradeoff. This alloy will rust. The upside of this is that steels that will rust will often patina beautifully. Here’s what you need to know...

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