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Mild steels
Tool steels
Tool steel refers to a variety of carbon steel and alloy steel that are particularly well-suited to be made into tools. Their suitability comes from their distinctive hardness, resistance to abrasion and deformation, and their ability to hold a cutting edge at elevated temperatures. As a result, tool steels are suited for use in the shaping of other materials.
Cold-work steels are further subdivided into: * Air-hardening * Medium-alloy cold-work steels * High-carbon, high-chromium cold-work steels * Oil-hardening cold-work steels
Hot work steels are subdivided into: * Chromium * Tungsten * Molybdenum hot work steels
High-speed tool steels are divided into: * Molybdenum * Tungsten * Intermediate high-speed steels
Other types of tool steels include: * Water-hardening tool steels * Shock-resistant tool steels * Low-carbon tool steels * Low-alloy special purpose tool steels.
Spring steels
=References= * [https://en.wikipedia.org/wiki/Tool_steel Wikipedia: Tool steel] * [https://www.azom.com/article.aspx?ArticleID=6138 Tool Steel Classifications]