ASTM E 446 - 98. Standard Reference Radiographs for Steel Castings Up to 2 in. (51 mm) in Thickness

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American Society for Testing and Materials (ASTM). 1998, 3 pages.
These reference radiographs2 illustrate various types and degrees of discontinuities occurring in steel castings that have section thicknesses up to 2 in. (51 mm).