While porosity is the most frequently discussed casting defect, ASTM E155 categorizes several distinct types of internal discontinuities across varying material thicknesses (typically up to 2 inches).
This level of specificity removes ambiguity and ensures your supplier knows exactly what is being required.
Denotes large, heavily concentrated clusters of porosity or severe shrinkage voids. Castings at this level experience significant reductions in tensile strength and fatigue life, often leading to structural failure. Section Thickness Categories
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. While porosity is the most frequently discussed casting
Level III NDT Consultant specializing in digital radiography and castings for aerospace & defense.
Note: While PDF repacks provide excellent training tools and office references, official aerospace and defense audits usually require licensed digital reference images certified directly by ASTM to maintain strict compliance. How Acceptance Criteria are Applied
The Indispensable Visual Rosetta Stone: A Deep Dive into the ASTM E155 Porosity Repack
