Ductile iron is a high-strength cast iron material with spherical graphite. This material has the characteristics of wear resistance, heat resistance, and high strength. Improve the mechanical properties of cast iron and achieve higher strength than carbon steel.

Advantages of Ductile Iron：

1. Ductile iron has high strength and good tensile properties. The yield strength of ductile iron is 40k.

2. Ductile iron has better corrosion resistance and oxidation resistance, because ductile iron contains spherical graphite microstructure, which is very good at reducing vibration, and ductile iron has low cost and high casting efficiency.

3. Ductile iron has good physical properties, good ductility and impact resistance.