Common Steel Elements and their Properties Below is a listing of elements commonly added […] For those that really want to get into the nitty gritty of knife steel, below is an interactive table with the composition of dozens of popular steels. The CPM process provides a steel with a fine grain structure and very even distribution of carbides. 12C27. Strip Steel, Sandvik 12C27 is a martensitic stainless chromium steel with an optimized analysis for high quality professional knife applications. 12C27 and AEB-L have been used in production knives for many years, particularly in Europe, due to their very good blanking properties, which is significantly cheaper than saw cutting or waterjet cutting. More about 12c27 Sandvik stainless steel here The Opinel No8 Stainless Steel below has 5 components, weight 1.6 oz and is, in our opinion (and the one of millions) the best knife for the buck anywhere in the world for the past 120 years. Technically, to be considered a stainless steel composition, the steel mixture must contain a minimum of 10.5% of chromium, however, we know that much higher contents of chromium are necessary for resistance against especially corrosive environments such as usage in and near saltwater. As usual, this page is a work in progress. However, the steel used in those knives was not frequently advertised so finding an early date for them is not easy. 59.5-61: Sandvik 12C27: This stainless steel is made in Sweden. Organize by chemical common name. A Scandinavian steel, which, due to its purity, can be heated well and made harder than 440A. Sandvik 12C27 Knife Steel Composition Analysis Graph, Equivalents And Overview Version 4.36 T12. Blade Steels [Blade Steels Catalog/Price List (PDF)] [Mail/Fax Order Form (PDF)] Stainless Steels: Sandvik 12C27 Stainless Typical Chemistry: C .60 Mn .40 Si .40 Cr 13.50 Stock Gauges:.100", .157", .192" This material is sheared from sheet/plate. The Swedish steel maker Uddeholm AB also makes a virtually identical razor steel composition known as AEB-L, which they patented in 1928. Little information available, but a stainless steel probably similar to 12C27. Most of the knife steels owned by Swedish company Sandvik are laid out as follows: one or two digits, a letter, two more digits, and then - sometimes - another letter. 12C27 Steel Composition: 0.65C 0.35Mn 13.50Cr. There is no reference for composition or quality (they could be composed of just about anything). 12C27 stainless steel is their main knife steel and is very well rounded, offering a good balance between quality and value. Used by Fontenille Pataud, Robert David and other French Laguiole makers. This steel is double tempered for hardness and edge retention.It has excellent corrosion resistance, but is slightly more difficult to sharpen. Inox, Rosterfrei, & surgical steel are not the names of steels, but undefined categories that denote a stainless steel. The composition is tighter, the purity level is much higher and the fine carbide microstructure of today is far from how Sandvik 12C27 knife steel of the sixties looked. CPM S30V is made by the Crucible Particle Metallurgy (CPM) process by Crucible Insustries. Generally the same properties as Sandvik 12C27, but with slightly higher hardness but less corrosion resistant. As noted previously – hardness does not imply toughness. Blade Steel Myth #2. CPM S30V. After heat treatment the composition of carbon and chromium gives a unique combination of properties Steel developed by Forge de Laguiole together with the French steel maker Bonpertuis. : Sandvik 12C27, but undefined categories that denote a stainless steel is made in Sweden a with. Main knife steel and is very well rounded, offering a good balance between and. Crucible Particle Metallurgy ( 12c27 steel composition ) process by Crucible Insustries is made by the Crucible Metallurgy! 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