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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 austenitic nodular iron or austenitic spheroidal iron, is characterized by having its graphite substantially in a spheroidal form and substantially free of flake graphite. It contains some carbides and sufficient alloy content to produce an austenitic structure.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A732/A732M Specification for Castings, Investment, Carbon and Low Alloy Steel for General Application, and Cobalt Alloy for High Strength at Elevated Temperatures
E8 Test Methods for Tension Testing of Metallic Materials
E30 Methods for Chemical Analysis of Ferroalloys Withdrawn. The last approved version of this historical standard is referenced on www.astm.org.
E59 Practice for Sampling Steel and Iron for Determination of Chemical Composition
E351 Test Methods for Chemical Analysis of Cast Iron--All Types
ICS Number Code 77.140.80 (Iron and steel castings)