Ductile iron is not pure iron but an alloy material composed of iron, carbon and various alloying elements, which has excellent mechanical properties and corrosion resistance.

Ductile iron is actually an alloy material, not pure iron.

First of all, we need to understand what pure iron is. Pure iron refers to metallic materials with an extremely high iron content. However, in practical applications, pure iron is rarely used directly because of its poor mechanical properties and inability to meet the demands of most industries. On the contrary, alloy materials improve the properties of pure metals by adding other elements, thereby meeting various application requirements.

Ductile iron is a typical alloy material. Its main components are iron and carbon, and it also contains alloying elements such as silicon, manganese and phosphorus. The addition of these elements endows ductile iron with excellent mechanical properties and corrosion resistance, and it is widely used in various engineering fields such as automobiles, construction, and machinery.

The characteristic of ductile iron lies in the spherical form of its graphite. This spherical graphite is evenly distributed, which endows ductile iron with high strength and toughness, as well as good impact resistance and wear resistance. This makes ductile iron perform well under heavy loads and complex stress environments, making it a material used in many engineering fields.

In conclusion, ductile iron is not pure iron but an alloy material composed of iron, carbon and other alloying elements. Its excellent performance and wide application are all attributed to its unique composition and manufacturing process. Therefore, when choosing and using ductile iron, we need to fully understand its properties and composition in order to better leverage its advantages and meet engineering requirements.