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This type of tool steel air-hardens at a relatively low temperature (approximately the same temperature as oil-hardening types) and is dimensionally stable. Therefore, it is commonly used for dies, forming tools, and gauges that do not require extreme wear resistance but do need high stability.
A2 used to be the standard baseline steel used by Bark River Custom Knives and is used as the standard tool steel for the Black Wolf Knives range of Hunting Knives. [promotion?] A3; A4; A5; A6, a grade of tool steel which air-hardens at a relatively low temperature (approximately the same temperature as oil-hardening grades) and is ...
Mad Dog Knives makes tactical fixed-blade knives, originally using Starrett 496-O1 high carbon tool steel and later switching to Precision Marshall Presco American Made 01, which is given a proprietary heat treatment. This process includes hardening, stress relieving, and selectively tempering the blade. [1]
Depending on the temperature and composition of the steel, it can be hardened or softened. To make steel harder, it must be heated to very high temperatures. The final result of exactly how hard the steel becomes depends on the amount of carbon present in the metal. Only steel that is high in carbon can be hardened and tempered.
Tempering consists of heating steel below the lower critical temperature, (often from 400˚F to 1105˚F or 205˚C to 595˚C, depending on the desired results), to impart some toughness. Higher tempering temperatures (maybe up to 1,300˚F or 700˚C, depending on the alloy and application) are sometimes used to impart further ductility, although ...
Steel with a high carbon content will reach a much harder state than steel with a low carbon content. Likewise, tempering high-carbon steel to a certain temperature will produce steel that is considerably harder than low-carbon steel that is tempered at the same temperature. The amount of time held at the tempering temperature also has an effect.
Tool steel 1.2344 is a high hot-wear resistance and great strength, warm conductivity air hardening and invulnerability to hot cracking. It has a great resistance to abrasion at each low and high temperature due to the presence of high vanadium.
Cryogenic hardening is a cryogenic treatment process where the material is cooled to approximately −185 °C (−301 °F), typically using liquid nitrogen.It can have a profound effect on the mechanical properties of certain steels, provided their composition and prior heat treatment are such that they retain some austenite at room temperature.
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