Technical Papers

There are many grades of ductile iron and several specifying bodies within the U.S.A. The most commonly used are those written by A.S.T.M. and frequently these are used as base references by other specifying bodies or casting consumers.

A new generation of ductile irons has been developed by Willman Industries. These new grades produce higher strengths with even greater elongation. These grades can be produced as cast with greater uniformity of casting properties than the original ductile iron grades.

Austempered ductile iron or A.D.I as it is commonly called, is a ductile iron which is processed by a special treatment. The heat treatment requires an interrupted quench usually into a salt bath.