Courtesy: Hogfors Industries Ltd., Finland

Austempered Ductile Iron gears to patented specifications K9805.

Other examples of the use of ADI castings include truck spring supports, railroad axle-box spring adaptors, crankshafts, connecting rods, agricultural plough shares, etc.

ADI Crankshaft for Ford turbo-charged engine-ADI capable of meeting fatigue strength requirements at much lower cost than forged steel.

Success in consistently achieving the optimum properties and performance of ADI requires high quality, careful selection and control over the base Ductile Iron, and heat treatment parameters. This necessitates material of high nodule count which is free from carbides, inclusions and shrinkage and of a composition which minimizes the dangers of alloy segregation.

This brief summary about the DUCTILE IRON FAMILY is based on metallurgy, rather than on standard specifications. A chart showing the properties of most of the Ductile Iron grades is enclosed on the inside back cover of this publication. All properties are primarily determined by chemical composition, cooling (solidification and solid cooling rate) and matrix structure.