회주철, or "cast iron," is a type of iron alloy that contains a high percentage of carbon, typically between 2% and 4%. This material is known for its excellent castability, allowing it to be easily molded into various shapes. It is commonly used in the manufacturing of cookware, pipes, and automotive parts due to its durability and resistance to wear. The properties of 회주철 make it suitable for applications that require strength and heat retention. It is often used in products like frying pans and engine blocks. Additionally, its ability to absorb vibrations makes it a popular choice for machine bases and heavy equipment.