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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 magnetic permeability test. Samples taken from test coupons, broken test specimens, or castings shall conform to the required chemical compositions of carbon, silicon, manganese, phosphorus, nickel and chromium. Mechanical tests shall be performed wherein the iron casting specimens shall conform to the required values of tensile strength, yield strength, elongation and Brinell hardness.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
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 either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
A247 Test Method for Evaluating the Microstructure of Graphite in Iron Castings
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
E8 Test Methods for Tension Testing of Metallic Materials
E10 Test Method for Brinell Hardness 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E30 Methods for Chemical Analysis of Ferroalloys Withdrawn.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)
UNSPSC Code 31101618(Ductile iron sand casting)
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ASTM A439 / A439M-15, Standard Specification for Austenitic Ductile Iron Castings, ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top