high-carbon steel
Technical term for steel with a carbon content typically above 0.6%, used for tools and cutting edges.
High-carbon steel is often used as a material for blades.
炭素鋼 is a broader term for carbon steel in general, while 高炭素鋼 specifically refers to high-carbon steel.
Compound of 高 (high), 炭素 (carbon), and 鋼 (steel).