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May tolerate porosity up to Level 5 or higher .
In radiographic testing (RT) of aerospace, automotive, and industrial castings, evaluating internal discontinuities requires precise, standardized reference points. ("Standard Reference Radiographs for Inspection of Aluminum and Magnesium Castings") serves as the global benchmark for evaluating these imperfections. astm e155 porosity levels pdf repack
For inspectors, engineers, and quality personnel, having quick access to via a PDF or interpreted repack guide is essential for determining whether a part meets acceptance criteria.
: Discontinuities are grouped into categories such as Category A (Gas Porosity) , which includes both round and elongated types. Summary of Porosity Acceptance (Typical) This public link is valid for 7 days
The original ASTM E155 is a physical set of film radiographs, which are costly and difficult to share. A "repack" PDF or digital version offers an immediate, shareable overview of the defect levels (e.g., this example on Scribd ).
A critical caveat that users must understand: ASTM E155 reference radiographs are reference images intended for conventional film radiography only. The standard explicitly states: "These film reference radiographs are not intended to illustrate the types and degrees of discontinuities found in aluminum-alloy and magnesium-alloy castings when performing digital radiography" . For digital radiographic examination of aluminum castings, users must refer to ASTM E2422 ( Digital Reference Images for Inspection of Aluminum Castings ); for magnesium castings, ASTM E2869 ( Digital Reference Images for Magnesium Castings ) applies. Can’t copy the link right now
For castings with thicknesses up to 2 inches (50.8 mm).