ASTM A536-24 pdf download,Standard Specification for Ductile Iron Castings. 1.1 This specification ASTM A536 applies to castings fabricated from ductile iron, also referred to as spheroidal or nodular iron. It is characterized by cast iron that contains graphite predominantly in a spherical shape and is essentially free of other graphite forms, as defined in Terminology A644. 1.2 It is not possible to establish a precise quantitative correlation between the properties of the iron at different locations within a single casting or between the properties of the casting and those of a test sample that has been cast from the same...