![]() ![]() NOTE 2-Reference radiographs previously used for this thicknessrange carried the designation E71, but included a now rarely usedgamma source, that is, radium. NOTE 1-The basis of application for these reference radiographsrequires a prior purchaser supplier agreement of radiographicexamination attributes and classification criterion as described inSections 4, 6, and 7 of this standard. Categories and severity levelsfor each discontinuity type represented by these referenceradiographs are described in 1.3. The reference radiograph films are an adjunct tothis standard and must be purchased separately from ASTMInternational, if needed (see 2.2). Reference Radiograph standards E446 and E280 provide some overlap of severity levels for similar discontinuity categories within the same energy level range (see 4.2, 5.1, and 6.These reference radiographs 2 illustrate variouscategories, types, and severity levels of discontinuities occurringin steel castings that have section thicknesses up to 2 in. Reference radiographs for other steel casting thicknesses may be found in Reference Radiograph standards E446 and E280. Note that 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 4, 6, and 7 of this standard. Categories and severity levels for each discontinuity type represented by these reference radiographs are described in 1.2. The reference radiograph films are an adjunct to this document and must be purchased separately from ASTM International, if needed (see 2.2). ![]() 1.1 These reference radiographs 2 illustrate various categories, types, and severity levels of discontinuities occurring in steel castings that have section thicknesses of 2 to less than 4 1/ 2 in. ![]()
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