9/23/2023 0 Comments Astm e446 pdf free![]() ![]() The current document is also updated by inclusion of several recognized shrinkage or C categories and by elimination of the crack and hot tear categories except for one example of each of these discontinuity types. Note 1-Reference radiographs previously used for this thickness range carried the designation E71, but included a now rarely used gamma source, that is, radium. At the same time, the standards so established may be unambiguously identified by alphabetic defect category (or type) designation and severity level. They are intended to provide the following:ġ.1.1 A guide enabling recognition of discontinuities and their differentiation both as to type and severity level, where applicable.ġ.1.2 Example radiographic illustrations of discontinuities, that are ungraded, for reference in acceptance standards, specifications, and drawings.ġ.1.3 Sets of reference radiographs from which purchasers and suppliers may, by mutual agreement, select particular illustrations to serve as standards representing minimum acceptability. 1.1 These references illustrate various types and degrees of discontinuities occurring in steel castings that have section thicknesses up to 2 in. ![]()
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