Significance and Use
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.
When employing steel casting reference radiographs to evaluate ductile iron castings, the applicable E446 , E186 , or E280 steel casting written standard shall also be used for specific
guidance and evaluation procedures.
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. Scope
1.1 This standard extends the application of steel casting reference radiographs E446 , E186 , and E280 to ductile iron castings when determined appropriate for specific applications (see
Section 4).
1.2 The reference radiograph films are an adjunct to E446 , E186 , or E280 , and must be purchased separately from ASTM International, if needed (see 2.1). Categories and severity levels for
each discontinuity type represented by these reference radiographs are described within each applicable standard above.
Note 1The basis of application for these reference radiographs requires a prior purchaser supplier agreement of radiographic examination attributes and
classification criterion as described in Sections 4, 5, and 6 of this standard.
1.3 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
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
Keywords
classification; discontinuity; ductile iron castings; gamma ray; reference radiographs; X-ray; Cast iron (testing)--reference radiographs; Discontinuities--metals/alloys; Ductile iron
castings; Radiographic examination; Reference radiographs;
ICS Code
ICS Number Code 77.080.10 (Irons)
DOI: 10.1520/E0689-10
ASTM International is a member of CrossRef.
ASTM E689