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The level of carbon content can be roughly divided into low carbon steel (carbon content is generally less than 0.25%); Medium carbon steel (carbon content is generally between 0.25-0.60%). But there is not a hard line between them.Carbon is the main alloying element of iron and steel materials, so iron and steel materials can also be called an iron-carbon alloy. The main role of carbon in steel is:1. The formation of a solid solution structure improves the strength of steel, such as ferrite, austenite structure, and dissolved carbon... more