On January 15, 2020 Spyderco announced [1] knives being produced in a new steel: CPM SPY27, a steel produced by Crucible. The steel is reportedly exclusive to Spyderco. The SPY refers to Spyderco and 27 is the atomic number of cobalt [2]. The composition [3] is as follows: I don’...
2020 had a lot going on, of course. But a lot of good came in the area of knife steel. Let’s go through some of the highlights. New Steels The big announcement in terms of new steels was the Spyderco-exclusive CPM SPY27. This steel was announced in January of this year, and I ...
It’s hard to say. Let the job at hand be your guide. It’s OK to be a steel snob, but keep in mind that you don’t have to if you want a good knife. If you have a favorite steel, rock on! But keep in mind that no steel is perfect for everything. ...
Cold Steel Bush Ranger Lite Review Time to face it, fellow knife nerds – We’re living in an era of over-saturation. With so many companies releasing a deluge of new designs, it’s difficult to pluck the hits from the static. But after months of blade malaise, something interesting caug...
and SPY27, an increase in austenitizing temperature was found to increase both hardness and toughness, so this result would be consistent with that. However, this steel has high hardness and corrosion resistance which can mean excess retained austenite which sometimes leads to inflated toughness val...
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Thanks to George Walton, Josh Perdue, Bill Fitzgerald, and Donovan Phillips for becomingKnife Steel Nerds Patreonsupporters! Podcasts I appeared on two podcasts this past week,Knife PerspectiveandMark of the Maker. Knife Perspective I had been on before so we mostly focused onMagnaCutand other to...
All these measurement are great (not only) for steel nerds What really surprises me though is the edge retention (TCC) of the S30V. This is a well known steel and one can find many edge retention tests online (while indeed not as scientific as your approach) in which the S30V never get...
Thanks to Konstantinos Noulis, Neil MacEachern, and J Kane Searcy for becomingKnife Steel Nerds Patreonsupporters! S35VN Steel History S35VN is a steel developed and produced by Crucible Industries, released in 2009. The steel was developed by Maria Sawford as a modification of S30V by reduci...