The science behind the steel: what alloying elements actually do, how steel types differ, and what happens inside the metal during heat treat.
Two steels with similar hardness numbers can feel completely different under a sharpening stone, one glides along smoothly, another feels like it's dragging against…
"Carbon steel," "stainless steel," "tool steel," and "powder metallurgy steel" get used as if they're four completely separate categories, but they actually describe different,…
Every earlier metallurgy guide, alloying elements, steel categories, carbides, heat-treat theory, is background for one practical question: which steel actually fits the knife you're…
Powder metallurgy (PM) comes up constantly as a selling point for modern steels, but the actual manufacturing process behind the label rarely gets explained.…
Cryogenic treatment gets talked about as a mysterious extra step that makes steel better, but what it actually does is straightforward metallurgy: finishing a…
The wavy line visible along a hamon-bearing blade isn't decoration applied after the fact, it's a direct visual record of which parts of the…
"Grain" comes up constantly in heat-treat discussions, fine grain is good, coarse grain is bad, normalizing refines it, but it's rarely explained what grain…
The Heat Treating Guide covers the practical steps: normalize, austenitize, quench, temper. This guide covers what's actually happening inside the steel at each of…
Every knife steel is iron plus a specific recipe of other elements, and each of those elements pulls the steel's behavior in a particular…
Heat treat recipes and steel spec sheets both cite a target hardness on the Rockwell C scale, but the number by itself doesn't explain…