Environmental Embrittlement of Ductile Iron

By: M. Gagne, K.L. Hayrynen

Publication Date: October 16, 2006

Contact: Kathy Hayrynen

Document Type: White Papers

When designing mechanical components, engineers take benefit of the many advantages of Ductile Irons over
steels, eg. excellent castability, low cost, high machinability and a wide range of achievable mechanical
properties. However, to take full advantage of a material, the designer must also know the limitations of this
material in a given environment. Certain grades of Ductile Irons have been recently reported to be prone to
environmentally assisted embrittlement when exposed to liquids. This article reviews the data published on the
subject, with a particular emphasis on austempered Ductile Irons. The published information is complemented
by the results of a recent study carried out on the ADI behavior.