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I finally finished my testing of K390 so I can compare its properties to other popular knife steels.
Written version of this information: knifesteelnerds.com/2023/04/1...
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00:00 Intro
00:05 K390 Composition and History
00:51 Hot Hardness
02:51 K390 in knives
03:18 Bohler's Claims about K390
03:48 Microstructure
05:24 CATRA Edge Retention
06:34 Toughness
08:03 Choosing Knives in K390 vs Similar Steels
08:25 Toughness vs Other Steels
09:17 The Biggest Problem with K390
09:38 Heat Treating K390
11:49 New Steel Ratings
12:57 Patreon
13:04 Knife Engineering
13:07 Subscribe