The main components are iron, carbon, silicon, manganese, etc. By adding nodulizing agents and inoculants to the molten iron, the graphite is nodulized, significantly improving the mechanical properties of cast iron. It features high strength, high toughness, corrosion resistance, and is mainly applied in the following scenarios: Urban and rural drinking water projects, ensuring water quality and stability of water transmission. Drainage: Suitable for urban rainwater and sewage pipelines, with corrosion resistance and strong pressure bearing capacity. Gas: Relying on high strength and sealing performance, it safely transports gas. Others: Applied in industrial fluid transportation, mine drainage and ventilation, and other projects.