Valve Manufacturing Plant

Ductile iron, also known as nodular cast iron or spheroidal graphite iron, is a high-strength cast iron material obtained through spheroidizing and inoculation treatment. Its performance characteristics include the following:

1. High Strength

Ductile iron has strength comparable to carbon steel, with tensile strength typically ranging from 400 to 800 MPa and yield strength between 300 and 500 MPa, which is significantly superior to gray cast iron.

2. Good Toughness

The spherical distribution of graphite in ductile iron minimizes the cutting effect on the metal matrix, resulting in high impact toughness and fatigue resistance.

3. Excellent Wear Resistance

The hardness of ductile iron can be enhanced by adjusting the microstructure (such as pearlite or ferrite), providing strong wear resistance, making it suitable for components subjected to high loads and friction.

4. Superior Corrosion Resistance

Ductile iron exhibits good chemical stability and, especially after coating treatment, can effectively resist various water, chemical media, and atmospheric corrosion.

5. Good Damping Performance

The presence of graphite gives ductile iron high damping capacity, allowing it to effectively absorb vibration and noise. This makes it widely used in machinery and automotive components requiring vibration damping.

6. Excellent Castability

Ductile iron has excellent fluidity and castability, enabling the production of complex-shaped parts with stable dimensions and minimal post-casting machining requirements.

7. High Cost-Effectiveness

Ductile iron has a lower production cost compared to steel while offering comparable performance to carbon steel and some alloy steels, making it highly cost-effective.

Application Fields

Due to its outstanding properties, ductile iron is widely used in water pipes, valves, automotive components, construction machinery, pressure vessels, and building structures.

In summary, ductile iron, with its high strength, good toughness, wear and corrosion resistance, plays a crucial role in various industrial fields.