Uploaded October 2023 | Updated September 2026, 1 hour ago

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Learn more about steel by watching it get beat up!

In this Knife School episode we put several sample blades through some abusive testing to see how they would all stack up.

Blades Tested:
CPM 3V∆ test: 11:10
CPM 3V∆ production: 14:52
CPM 3V recent R&D: 19:22
CPM 3V Boise HT: 52:05
CPM Magnacut production: 24:41
CPM Magnacut Boise HT: 30:24
CPM 20CV production: 38:20
Uddeholm Elmax crica 2012: 45:15
Böhler K890 R&D: 55:24
Böhler K890 high temper: 1:02:16
Böhler K890 low temper: 1:05:55
M4 (Bonus footage): 1:13:40

Knives in this video:
GSO-5.1: surviveknives.com/gso-5-1
EDC-4: surviveknives.com/edc-4

Remember: We do not recommend using any knife to cut through metal, this video is intended to demonstrate properties of various steels.