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Significance and Use
4.1 The casting process has demonstrated radiographic similarities between internal discontinuities for ductile cast iron and cast steel to the extent that the reference radiographs for steel castings are applicable. The exact application and usage of discontinuity classifications contained within steel casting reference radiographs must, however, give consideration to the differences in material properties between cast steel and ductile cast iron. In some applications, reference radiographs for steel castings may not be entirely applicable to ductile cast iron material dependent upon design or other usage criteria.
4.2 When employing steel casting reference radiographs to evaluate ductile iron castings, the applicable , , or steel casting written standard shall also be used for specific guidance and evaluation procedures.
4.3 These reference radiographs are intended as a basis from which manufacturers and purchasers may, by mutual agreement, select particular discontinuity classes to serve as standards representing minimum levels of acceptability. Reference radiographs represented by these steel casting standards may be used, as agreed upon in a purchaser supplier agreement, for radiation energy levels, thicknesses or both outside the range of these standards when determined applicable for the casting service application
1.1 This standard extends the application of steel casting reference radiographs , , and to ductile iron castings when determined appropriate for specific applications (see Section ).
1.2 The reference radiograph films are an adjunct to , , or , and must be purchased separately from ASTM International, if needed (see ). Categories and severity levels for each discontinuity type represented by these reference radiographs are described within each applicable standard above.
Note 1: The basis of application for these reference radiographs requires a prior purchaser supplier agreement of radiographic examination attributes and classification criterion as described in Sections , , and of this standard.
1.3 From time to time, there may be minor changes to the process for manufacturing of the reference radiograph adjunct materials. These changes could include changes in the films or processing chemicals used, changes in the dies or printing for the cardboard mats, etc.; however, in all cases, these changes are reviewed by the Illustration Monitoring Subcommittee and all reference radiographs are reviewed against a fixed prototype image to ensure that there are no changes to the acceptance level represented by the reference radiographs. Therefore, the adjunct reference radiographs remain valid for use with this standard regardless of the date of production or the revision level of the text standard.
1.4 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.
E94 Guide for Radiographic Examination
E186 Reference Radiographs for Heavy-Walled (2 to 412-in. (50.8 to 114-mm)) Steel Castings
E242 Reference Radiographs for Appearances of Radiographic Images as Certain Parameters are Changed
E280 Reference Radiographs for Heavy-Walled (412 to 12-in. (114 to 305-mm)) Steel Castings
E446 Reference Radiographs for Steel Castings Up to 2 in. (50.8 mm) in Thickness
E1316 Terminology for Nondestructive Examinations
ICS Number Code 77.080.10 (Irons)
ASTM E689-15, Standard Reference Radiographs for Ductile Iron Castings, ASTM International, West Conshohocken, PA, 2015, www.astm.orgBack to Top