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Cast Iron (Grey Iron)
Cast irons offer a tremendous range of metallic properties of strength, hardness, machinability, wear resistance, abrasion resistance, corrosion resistance and other properties.
The foundry properties of cast irons in terms of yield, fluidity, shrinkage, casting soundness, ease of production and others make the material highly desirable for casting purposes.
The cast-iron family offers a variety of engineering properties that ensure its continued and widespread use.
Ductile Iron (SG)
Ductile iron is not one type of material, but a way of classing a versatile family of irons with different properties by producing different microstructures.
All ductile irons have spherical graphite nodules in their microstructure which act as 'crack-arresters'. These nodules create the ductility and strength, which is greater than any other irons.
Ductile iron has been around since the 1930's and since commercial use began in 1948 ductile iron castings have proved to be a cost effective substitution to malleable iron, steel castings, forgings and fabrications. Castings instead of stamping, forging or welding is the most universal proactiveable method available offering greater flexibility in the shape of castings. Ductile iron castings also offer the ability to combine several components into one casting.
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