What is Tool Steel?
Cold work steel is tool steel that can be used for applications where the surface temperature of the cutting edge does not exceed 392°F. They can be, due to their alloys, have a high through hardenability, polishability, wear resistance and ductility. They find their use in for example cold rolling, machining, and guiding.
Hot work steel can be used for tools which can be used at temperatures up to 752°F. They find their uses for applications such as press punches, die casting molds and dies as they have properties such as high creep resistance, high temperature toughness or heat wear resistance.
High speed steel: The definition and explanation can be found in a separate document/article.
What is unalloyed tool steel?
Unalloyed tool steels are cold work steels for an operating temperature of up to 392°F. They can be hardened through but also have a high surface hardness, high wear resistance and good cutting capabilities.
Unalloyed tool steel can be used to produce simple tools which are subjected to low stress.
Unalloyed tool steels can be further divided into low carbon content, approx. 0.05-0.24% (Steel 1018), medium carbon content, approx. 0.25-0.6% (Steel 1045), high carbon content, approx. 0.60-1.00% (Steel W1) and very high carbon content, approx. 1.00-1.5%.
What is alloy tool steel?
Alloy tool steel can be cold work steels but as well hot work steels for a working temperature up to 752°F (the exception is the 2990 mod., as a cold steel it can be used up to 932°F). High speed steel is being used for working temperatures up to 1112°F.
Unlike unalloyed tool steel alloyed tool steel can be hardened through. For that process they will be heated and then quenched in oil, air, or water. Alloyed tool steel can be used to produce tools that are exposed to higher stresses as they have a higher creep resistance, higher hardness, and higher tempering resistance.
What are high alloy tool steels?
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