Carbon Steel

Carbon steel, also called plain carbon steel, is a metal alloy, a combination of two elements, iron and carbon, where other elements are present in quantities too small to affect the properties.  The only other alloying elements allowed in plain-carbon steel are manganese (1.65% max), silicon (0.60% max), and copper (0.60% max).  Steel with a low carbon content has the same properties as iron, soft but easily formed.  As the percentage of carbon increases, there is a tendency for the metal to harden and crack.


  • CS - carbon steel
  • LCS - low-carbon steel
  • MCS - medium-carbon steel
  • HCS - high-carbon steel
  • UHCS - ultrahigh-carbon steel


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High-carbon Steel
Low-carbon Steel
Mediun-carbon Steel
Ultrahigh-carbon Steel