Astm E155 Porosity Levels Pdf Repack Jun 2026

Interpret the (gas vs. shrinkage).

provides a standardized catalog of reference radiographs. These radiographs visually illustrate the types and severity levels of various discontinuities. When inspecting a component using X-ray or gamma-ray imaging, inspectors compare the resulting image of the cast part to the reference radiographs to grade its quality. 1. Categorization of Discontinuities

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The evaluation process relies heavily on the skill of a certified Non-Destructive Testing (NDT) inspector. The workflow follows these strict engineering steps:

Jagged, distinct cavities resulting from localized volume contraction. Interpret the (gas vs

: Each reference plate illustrates discontinuities within a 2-by-2-inch area. The evaluation is performed on comparable areas of the casting radiograph.

Non-spherical gas voids often appearing in clusters or strings. Shrinkage (Sponge): Porosity caused by the metal contracting as it cools. Foreign Material (Less/More Dense): These radiographs visually illustrate the types and severity

Used for 1/4 and 3/4-inch thicknesses.

The primary purpose of ASTM E155 is to act as an acceptance standard or comparison tool. By comparing a production radiograph to the standard reference radiographs, inspectors can determine whether a casting meets engineering requirements. Classification of Discontinuities in ASTM E155

ASTM E155 is a set of reference radiographs—films that show typical discontinuities (defects) in aluminum and magnesium castings. These reference images are used to compare with actual X-rays of production parts to determine if the part is acceptable based on predetermined quality standards. It covers various types of defects, including: Smooth-edged dark spots. Gas Porosity: Fine voids distributed throughout.

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