Classifies discontinuities into distinct types, including gas holes, shrinkage, foreign material, and various forms of porosity. Decoding Porosity Levels in ASTM E155
| Standard | Material/Application | Thickness Range | Severity Levels | |---|---|---|---| | | Aluminum and magnesium sand, permanent mold, and investment castings | Up to 2 in. (51 mm) via two reference thicknesses | 1–8 (graded discontinuities) | | ASTM E505 | Aluminum and magnesium die castings | Up to 1 in. (25 mm) | 4 severity levels, 3 discontinuity categories | | ASTM E2422 | Digital reference images for aluminum castings | Corresponds to E155 thickness ranges | Digital format | | ASTM E2869 | Digital reference images for magnesium castings | Corresponds to E155 thickness ranges | Digital format | | ASTM E446 | Steel castings (thin-wall, up to 2 in.) | Up to 2 in. | Graded severity levels |
The standard serves as the foundational reference for visual inspection and quality control of aluminum and magnesium castings. Industrial professionals, non-destructive testing (NDT) technicians, and aerospace engineers rely on this standard to evaluate internal discontinuities via radiographic inspection (X-ray). Among the various defects categorized by this standard, porosity is one of the most critical. astm e155 porosity levels pdf repack
Engineers, quality inspectors, and procurement specialists frequently rely on to establish acceptance criteria, perform Non-Destructive Testing (NDT), and categorize defects. For professionals attempting to organize, distribute, or digitally repackage these guidelines (often referred to as “ASTM E155 porosity levels pdf repack”), understanding how to correctly interpret and communicate these radiographic severity levels is essential. Decoding ASTM E155: What Are Porosity Levels?
An engineer designing a casting will assign a specific to different zones of a component based on stress profiles. For example: (25 mm) | 4 severity levels, 3 discontinuity
A well-constructed is actually ideal for digital NDT workflows—you can place the reference image directly on a second monitor while analyzing your DICONDE file on the primary monitor.
First, determine the thickness of your casting. ASTM E155 is divided into thickness ranges (e.g., up to 0.5 in, 0.5-1 in, 1-2 in). Use the wrong thickness range and your comparison is meaningless. Among the various defects categorized by this standard,
Gas porosity appears as round, dark spots on a radiograph. The ASTM E155 reference radiographs for gas porosity are graded by: