Category: Steels

4 thoughts on “Steels”

  1. Thanks for what you are doing. There is so much misinformation, hyperbole, and exaggeration being presented as fact on the internet regarding knife blade steel. I felt like the skies cleared when I discovered your site. I really appreciate your science-based approach to demystify so many issues.

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Carbides, Corrosion Resistance, Niobium-Alloyed, Nitrogen-alloyed, Powder Metallurgy, Steel and Knife Properties, Super Steels

What is the Future of Stainless Knife Steel Design?

Larrin

Thanks to Aram Compeau, Gordon Olafson, and John Walton for becoming Knife Steel Nerds Patreon supporters! I have an update on Patreon about the “rare earth” elements in AR-RPM9 steel.

I completed a minor revision to my new book Knife Engineering to correct a few typos. Some readers outside the USA also asked for more conversions from Fahrenheit than were present originally, so I incorporated both Celsius and Fahrenheit everywhere in the book in the text and tables, though some images and charts still have only one temperature scale or the other.  I wouldn’t say that the changes in the revision are big enough to buy a new one if you have it already, this is not a new edition, but if you haven’t purchased one yet this is as good a time as any. read more

History - Articles - Books, Super Steels

CPM 10V Steel – History, Properties, and How to Heat Treat

Larrin

My new book, Knife Engineering: Steel, Heat Treating, and Geometry was released last week. The reviews have been coming in and the feedback is very positive so far. Go get one! And make sure you leave a review on Amazon. Also, Australian readers are now telling me it is possible to buy the book now from Amazon USA. So if you had issues ordering in the past give it another try. But do not order from Amazon Australia, see my article to learn why. read more

Niobium-Alloyed, Nitrogen-alloyed, Super Steels

CPM SPY27 Experiments – Toughness, Corrosion Resistance, and More

Larrin

Thanks to A.N. Nash, Matt Collingwood, Noah Cowan, James Pierce, and Jay Caponetti for becoming Knife Steel Nerds Patreon supporters!

I have a new CATRA edge retention testing machine. I will be posting results as they come in to Patreon and articles summarizing the tests will come later to this website. If you want to see tests as they are completed come join us on Patreon. read more

Heat Treating and Processing, Steel and Knife Properties, Super Steels

Friction Forged Knives – Diamondblade Friction Stir Processing

Larrin

Thanks to Keith Coleman, Paul Bruno, Lotiel Vardamir, and Lennart Palkovits for becoming Knife Steel Nerds Patreon supporters!

Friction Forged Knives

The company DiamondBlade Knives produces knives with friction stir processed (FSP) edges [1]. Diamondblade Knives is a sub-company of Knives of Alaska. They use conventional D2 tool steel and process the edge so that it has hardness of around 65-69 Rc and a spine at 38-42 Rc. The knives are advertised as having a finer grain structure than powder metallurgy stainless steel and superior edge retention, toughness, and sharpness than knives tested in 12 other blade steels including S90V. And that the friction forged edge is stainless unlike conventionally processed D2. So I am going to detail the process used to produce the knives and what the properties of the steel likely are. read more