ASTM E 802 - 95. Standard Reference Radiographs for Gray Iron Castings Up to 41⁄2 in. (114 mm) in Thickness

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American Society for Testing and Materials (ASTM). Reapproved 1999, 2 pages.
These reference radiographs for gray iron castings consist of one set of illustrations of centerline shrinkage with severity levels 1 to 5 using three radiation source types