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Ductile Irons and Why

THE PLACE of Ductile Iron among engineering materials is as difficult to define precisely as it is for example for wood, plastic or aluminum. No materials can be better than all the others.

Nevertheless, thousands of examples prove, that Ductile Iron castings can replace other materials and manufacturing processes with either an improvement in performance or lower production cost, or both.

THE DESIGNER is advised to become acquainted with this family of cast alloys, with the production of castings and with general foundry operations. For instance, while not all foundries produce Ductile Iron grades, virtually all castings or cast shapes can be made from an appropriate grade of Ductile Iron. Ductile Iron will always have ductility. It is at least as strong as cast mild steel, but can be specified at much higher yield strength. Material selection depends not necessarily on strength. Within the limits of the space available, this booklet attempts to acquaint you with a variety of Ductile Iron properties.

THE FINAL CHOICE may or may not be Ductile Iron. The purpose of this booklet is to point out the unique combination of properties available with this material thereby helping the designer make a safe and economical choice. This choice is made much easier due to the existence of many foundries, capable of producing Ductile Irons of reliable quality.

 


RADIAL TIRE MOULD.

Courtesy: Morris Bean & Co.,
Yellow Springs, Ohio, U.S.A.

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