Blade Briza Trooper 95 from Brisa Knives Finland - one of the most famous knife companies from Finland, is made for surface mounting, blade height 24 mm, blade length - 95 mm, butt thickness 4 mm. The total length of the workpiece is 215 mm. Descents - scandi. Let us immediately note this very important point. Scandinavian descents, or descents from the butt itself to the supply, significantly improve the cutting properties of the knife, but such a construct is quite laborious to implement, therefore it is inherent only in very good and expensive blades. The workpiece is sharpened, at first glance the knife is very sharp. But this is just a technological sharpening, which indicates the angle that the manufacturer recommends for sharpening this product in the future. Therefore, looking ahead, let's say that after manufacturing the knife should still be sharpened for real. On the shank for surface mounting there are 2 mounting holes, a slot for a lanyard and one large technological cutout, which serves to reduce the weight of the handle and improve the balance of the finished knife. Mounting holes are made for inch sizes of ties (or pins). Closer to the blade, there is a hole, in the center, under the Corby screed (Corby Hole) by 4.6 mm. On the back side of the handle there are fixing holes for the Corby coupler (Corby Hole) by 4.6 mm, a hole by 6.5 mm and a lanyard slot 20x55mm. The installation of linings for this knife can be done using only two holes for ties and two for pins, but for beauty and reliability, you can install the pin anywhere in the technological cutout. The blade is laser engraved with the logo of the brand under which the knives are produced - Brisa and the brand of steel from which it is made - this is the famous 12C27. The guide to steels says about it that it is a corrosion-resistant martensitic chromium knife steel of the Swedish company Sandvic AB (Sweden), produced since the 60s of the XX century, which has a low content of impurities - sulfur and phosphorus. In other words, Sandvik 12C27 is perhaps the most balanced knife steel that simultaneously has excellent sharpening characteristics (easy to sharpen - hard to dull, and it really is!), high strength and corrosion resistance. For the curious, the density of Sandvik 12C27 steel is 7.7 g / cm3, and its chemical composition is: Chemical composition in% (nominal): Carbon (C) - 0.60% Chromium (Cr) - 13.5% Molybdenum (Mo ) - Silicon (Si) = 0.40% Manganese (Mn) - 0.40%. The unique characteristics of Sandvik 12C27 steel, which allow it to always be at the top of knife ratings, is simply explained, Sandvik 12C27 is one of the few steels designed specifically for making knives. Most other steels, which have compositions that are much more burdened with alloy and many times higher cost, as a rule, are developed for other narrower technological tasks that are far from knife topics (for example, for the manufacture of molds or cutting tools with large sharpening angles, etc.). P.). Therefore, for the manufacture of blades, such steels can only be adapted with varying degrees of success. The production technology of Sandvik 12C27 steel is constantly being improved, which leads to a constant improvement in quality indicators, an increase in density and purity, and an improvement in the fine microstructure of carbides. Therefore, today's Sandvik 12C27 steel is very different from the prototype 45 years ago. Sandvik 12C27 has high toughness, excellent cutting retention under various mechanical loads and good corrosion resistance. All this makes Sandvik 12C27 the most recommended steel for the production of high-quality top-class knives. Sandvik 12C27 steel is hardenable from 54 to 61 HRC. However, like most Finnish knives, Sandvik 12C27 blades are hardened to a hardness of 58-59 HRC. This hardness is generally recognized as optimal for kitchen knives. Plus, if you need to use this knife outdoors, at low temperatures, in the cold (when the temperature drops, the hardness of the steel increases and the blade, which has high hardness values, becomes brittle like glass) - a value of 58-59 HRC is also an optimal indicator.
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