{{Materials infobox
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|vitamins        = [[iron]], [[carbon]], [[molybdenum]], [[silicon]], [[chromium]], [[nickel]], [[manganese]], [[tungsten]], [[cobalt]], [[vanadium]]
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|transformations = [[smelting]], [[forging]]
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[[Category:Materials]]

=Introduction=

=Challenges=

=Approaches=
==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]