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Ductile Iron


Advantages and disadvantages of ductile iron (also known as nodular cast iron or spheroidal graphite iron), as well as the range of mechanical properties:



  1. High strength and toughness: Ductile iron exhibits superior toughness and ductility compared to traditional cast iron, enabling it to withstand impact and vibration loads.
  2. Excellent wear resistance: Ductile iron has high resistance to wear, making it suitable for applications that require resistance against abrasion and friction.
  3. Good machinability: Ductile iron is easy to machine, allowing for precise manufacturing and machining operations.
  4. Good corrosion resistance: Ductile iron offers good resistance to various corrosive environments.



  1. Higher cost: Ductile iron is generally more expensive than conventional cast iron.
  2. Challenges in processing: Ductile iron can be more difficult to process due to its unique internal structure in certain cases.


Range of mechanical properties:

The range of mechanical properties for ductile iron is influenced by factors such as alloy composition, heat treatment, and casting processes. Generally, the tensile strength of ductile iron can range from 400 to 900 MPa, the yield strength from 250 to 600 MPa, and the elongation typically varies between 10% and 20%. These values are provided as a reference, and actual values may vary based on specific conditions and usage requirements. When selecting and designing with ductile iron, it is important to consider specific application requirements.

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