Xinyuantai Pipeline Industry Co., Ltd. provided an in-depth explanation about the related knowledge of ductile iron. Ductile iron, also known as nodular cast iron, is an iron-carbon alloy with a carbon content exceeding 2%. In industrial applications, the carbon content typically ranges between 2.5% and 4%, and it includes elements such as C, Si, Mn, S, and P, all of which are derived from smelted iron ore in a blast furnace. Depending on the form of carbon present, ductile iron can be categorized into three main types: steel-making pig iron, foundry pig iron, and ductile iron itself.
Ductile iron is unique because its carbon precipitates in a spheroidal form. Unlike flake graphite, which weakens the metal matrix, the spherical graphite in ductile iron has a much lesser impact on the structural integrity of the matrix. This allows the overall strength of the cast iron to reach approximately 70-90% of the matrix's strength, with a tensile strength that can surpass 120 kgf/mm². Additionally, it exhibits excellent toughness, making it highly desirable for various engineering applications.
The chemical composition of ductile iron, apart from iron, typically includes a carbon content ranging from 3.6% to 3.8%, with silicon levels between 2.0% and 3.0%. It also contains manganese, phosphorus, and sulfur, with their combined total not exceeding 1.5%. Rare earth elements, magnesium, and other nodulizing agents are also added to achieve the desired properties.
This information was sourced from a leading manufacturer specializing in the production of ductile iron pipes. For further details, you may visit the official website linked below.
[Note: The above information is based on real-time insights and industry expertise. Additional research may be required for specific applications.]
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