Abstract
This specification covers ductile iron castings suitable low temperature service. Castings shall be produced by casting or heat treatment and shall have essentially a ferritic structure that contains no massive carbides. The iron shall conform to the required chemical composition for carbon, silicon, phosphorus, magnesium, manganese, copper, nickel and chromium. The iron shall conform to the required tensile properties such as tensile strength, yield strength and elongation. Graphite contained in the microstructure shall be evaluated and the percentage of each graphite type shall be estimated. The surface of the casting shall be examined visually and shall be free from adhering sand, scale cracks, and hot tears.
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. Scope
1.1 This specification covers ductile iron castings suitable for service at temperatures of −40°F [–40°C] and above.
1.2 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.
1.3 The following precautionary statement pertains only to the test methods portion, Section 11, of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) 
The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
A247 Test Method for Evaluating the Microstructure of Graphite in Iron Castings
E8 Test Methods for Tension Testing of Metallic Materials
E30 Test Methods for Chemical Analysis of Steel, Cast Iron, Open-Hearth Iron, and Wrought Iron
E59 Practice for Sampling Steel and Iron for Determination of Chemical Composition
E94 Guide for Radiographic Examination
E165 Practice for Liquid Penetrant Examination for General Industry
E351 Test Methods for Chemical Analysis of Cast Iron--All Types
E562 Test Method for Determining Volume Fraction by Systematic Manual Point Count
E689 Reference Radiographs for Ductile Iron Castings
E709 Guide for Magnetic Particle Testing
Keywords
Ductile iron castings--specifications; Ferritic iron castings; Ferritic steel castings--specifications; Low-temperature service applications--steel;
ICS Code
ICS Number Code 77.140.80 (Iron and steel castings)
DOI: 10.1520/A0874_A0874M-98R09
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