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Steel is another element that could be essential in terms of carbon, as well as a carbon content below 2.2%. Other iron-carbon with more than 2.2% carbon is called cast iron. Steels are the most widely used materials in the industry. Their properties can vary within very wide limits, depending on the carbon content and other alloying elements.
Depending on the content of the alloying elements, the steels are divided into:
Non-alloy steels (also called carbon steels), care for the main elements, but only iron and carbon
alloy steels, which takes care to stay hot and carbon with certain elements and other elements: niche, chromium, molybdenum, vanadium, etc.
In equilibrium conditions, the most important non-alloy steels are ferrite, austenite, cemented and pearlite.
In order to be able to have a higher and more durable and resilient value elsewhere, they may be subject to thermal regulations such as travel or nitriding. The ultimate goal to some extent is usually common after martensite.