Carbon steel:
Carbon steel is steel in which the main interstitial alloying constituent is carbon in the range of 0.12–2.0%.
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碳鋼:
碳鋼（carbon steel）是一类含碳量高于0.6%低于2%（高于2%的被称为铸铁）的钢材，它通常使用在需要強度、硬度和耐磨性的金屬零件上上，如切削工具、鋼纜、鋼琴線、彈簧和刀具等，在加工形成後，零件通常需要再經過處理並回火。
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Carbon steel碳鋼