Rockwell

Damascus blade knife, depending on its manufacture five times, and sometimes ten, more than usual. Favourite grades used by foreign manufacturers - 440C, ATS34, 154SM (on some data, and steel ATS34 154SM different minority content of alloying elements - manganese and silicon). Cast steel D2 appeared ten years ago. It has a unique microstructure (with special heat treatment), allowing for sharpening with a small angle with HRC 58-60. Steel CPMT440V, close to the composition of damask steel, is produced by powder metallurgy. The company are firm, but it still does not mean that the blades are made of such steel without drawbacks.

Imported from the U.S. knife, released one of the oldest firms in the world - by Buck. Certifying the quality certificate guarantee hardness HRC 60. And, indeed, experiencing a blade of steel 450S on the instrument Rockwell, it was confirmed. The knife was sharpened to razor sharpness (though before that was sharp enough) by hand using a special liquid (so do not let God do not let go of the edge) with the help of devices like "Lansky." However, at the edge of the first hunt safely jammed on ordinary spruce twig. Cheaper knives are made from foreign firms simpler steels, which are the usual hallmarks 420, 440, 440A, or simply pointing out that this stainless steel - INOX, ROSTFREI, SINOXID.

They are hardened to HRC 50-54, and no better than ordinary wear resistance of table knives, sharpen edges so sharp angle is not necessary. Somehow I came across a knife production GDR, I still have not learned the material from which it was made. So, when it is sharpened on the wheel there was virtually no sparks, only rare reddish liquid threads. Imprison him and I could not, the burr does not break off, although the blade was very solid. Among the "Soviet" steel instead of the former, very popular among artisans and producers of consumer goods of carbon and alloy steels U7-U8, 65G, 60S2, ShKh15, 9HF, H6VF etc.