Cast steel products are manufactured by melting steel, which has iron as its main component and a carbon content of approximately 0.05 to 2.0%, and then pouring it into a mold. They possess high strength, toughness, and excellent weldability, making them suitable for manufacturing complex shapes and large components. Typical processing methods include the casting process, where molten steel is poured into sand or metal molds, followed by solidification, demolding, and, if necessary, heat treatment for microstructure improvement and machining for surface finishing. They are widely used in heavy industry sectors that demand high reliability and durability, such as frames for construction machinery, ship propellers, turbine casings for power plants, and railway vehicle components.