1.1 This specification covers austenitic ductile iron castings, which are used primarily for their resistance to heat, corrosion, and wear, and for other special purposes. 1.2 Austenitic ductile iron, also known as aust This specification covers austenitic ductile iron castings used for their resistance to heat, corrosion and wear. The castings shall be melt processed using cupolas, air furnaces, electric furnaces or crucible furnaces. The iron castings shall undergo