Carbon steel is the most fundamental and widely used ferrous metal material in modern industrial production. It refers to carbon-based steel with a carbon content of less than 0.8%, containing extremely low sulfur, phosphorus and non-metallic impurities. Compared with other alloy steel materials, carbon steel features stable mechanical properties, high toughness, good weldability and excellent processability. It can be freely processed into carbon steel plates, carbon steel pipes, steel coils and various steel profiles. With low production cost and comprehensive performance advantages, carbon steel occupies an irreplaceable position in the metal industry. It is widely used in building structures, mechanical equipment manufacturing, bridge engineering, shipbuilding and automotive industries. With mature production technology and stable supply, carbon steel has always been the core basic material supporting industrial and infrastructure construction.