carbon steel
US /ˌkɑːr.bən ˈstiːl/
UK /ˌkɑːr.bən ˈstiːl/
1.
steel in which the main alloying element is carbon, with no minimum content specified for other alloying elements (such as chromium, nickel, molybdenum, or vanadium)
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The chef preferred knives made of high-carbon steel for their sharpness.
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Bridges are often constructed using durable carbon steel.