Thanks to Gabe Newell, George Thorpe, Jason, Rogelio Escobedo, Wes Newman, and Wayne Sears for becoming Knife Steel Nerds Patreon supporters! On Patreon there is a new article exclusive to supporters about Artisan Cutlery’s exclusive steel AR-RPM9. The composition was recently announced so I analyzed the composition. My new book Knife Engineering now has over … Continue reading S90V and S125V Knife Steel – History, Properties, and How to Heat Treat