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Because of this, 440C is one of the most common stainless alloys used for knife making. [34] The once ubiquitous American Buck Model 110 Folding Hunter was made of 440C before 1981. [citation needed] Böhler n695 is equivalent to 440C. [citation needed] Knife blades specified as being "440" can typically be assumed to be the lower-hardness 440A ...
440C (UNS designation S44004) is a martensitic 400 series stainless steel, [1] and has the highest carbon content of the 400 stainless steel series. It can be heat treated to reach hardness of 58 to 60 HRC. It can be used to make rolling contact stainless bearings, e.g. ball bearings and roller bearings. It is also used to make knife blades.
[7] [8] Before 1981, the specially heat treated stainless steel used was 440C, and from 1981 to 1992 the company used 425M steel. Since 1993, Buck has mostly used 420HC stainless steel for Model 110 blades, although CPM S30V steel has also been used for some production runs. Its design is one of the most imitated knife patterns in the world. [1]
Schrade Cutlery [47] and Spyderco use 154CM, 440C, D2, S30V, S60V and S90V steel, [48] [49] [50] and Ernest Emerson's knives are hard-ground from differentially heat-treated A2 tool steel. [51] Emerson Knives machines blades from 154CM steel, [citation needed] and Mike Snody uses A2, S35V, 154CM and 440C steels.
Engraving a knife. Knife making is the process of manufacturing a knife by any one or a combination of processes: stock removal, forging to shape, welded lamination or investment cast. [1] Typical metals used come from the carbon steel, tool, or stainless steel families. Primitive knives have been made from bronze, copper, brass, iron, obsidian ...
Martensitic stainless steels can be high- or low-carbon steels built around the composition of iron, 12% up to 17% chromium, carbon from 0.10% (Type 410) up to 1.2% (Type 440C): [8] The chromium and carbon contents are balanced to have a martensitic structure.
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