Here are the primary discontinuities covered by the standard: Gas porosity appears as small, round, or elongated dark spots on a radiograph. It is caused by gas bubbles becoming trapped in the metal as it solidifies. ASTM E155 provides reference images showing different densities of gas porosity, allowing inspectors to determine if the distribution is within acceptable limits for the specific grade of casting. 2. Shrinkage Shrinkage defects occur when the metal contracts as it cools. In radiographs, shrinkage can appear as jagged
For professionals seeking the , the search represents a quest for a critical baseline—a set of reference radiographs that defines the difference between an acceptable part and a costly failure. This article explores the significance of ASTM E155, what the standard contains, how it is applied in industry, and why obtaining the official documentation is vital for compliance. What is ASTM E155? ASTM E155 is the Standard Reference Radiographs for Inspection of Aluminum and Magnesium Castings. Published by ASTM International (formerly the American Society for Testing and Materials), this standard serves as the industry benchmark for evaluating the quality of castings using radiographic (X-ray or gamma-ray) inspection. Astm E155.pdf
In the world of Non-Destructive Testing (NDT), precision is not a goal; it is a requirement. When critical metal components—such as those used in aerospace, automotive, or nuclear industries—need to be inspected for internal flaws, radiography is the go-to method. However, an X-ray image is only as good as the interpreter's ability to understand it. This is where the standard known as ASTM E155 becomes indispensable. Here are the primary discontinuities covered by the