Specification for Abrasion-Resistant Cast Iron

This specification covers a group of white cast irons that have been alloyed to secure high resistance to abrasive wear in the applications of the mining, milling, earth-handling, and manufacturing industries.

Cast irons are alloys of iron, carbon, and silicon, in which more carbon is present than can be retained in solution in solid metal. In common (unalloyed) cast iron, the carbon that exceeds the solubility limit precipitates either as graphitic carbon or as iron carbide. There are six basic types of cast irons and several varieties of each. Dependable heat treatment requires information on the kind of material, its approximate composition, and what is to be accomplished. Types of cast iron are: white iron, malleable iron, gray iron, ductile iron, austempered ductile iron, compacted graphite iron, and high-alloy iron.