Stricter limitations apply here compared to fine porosity because larger voids act as severe stress concentrators. The Grading Scale (Levels 1 to 8)
Ultimately, a standard is a tool; you and your supplier define the rule. The ASTM E155 document explicitly states that it may be used where agreement has been reached between the purchaser and the manufacturer.
"ASTM E155, E505 and E2422 only classify and grade the various defects of castings, but do not specify the specific acceptance grade at the time of acceptance." astm e155 porosity levels pdf repack
For castings with thicknesses up to 2 inches (50.8 mm).
Do you need help converting traditional film inspection workflows to standards? Share public link Stricter limitations apply here compared to fine porosity
Even with excellent reference materials, interpreting radiographic images of porosity presents unique challenges:
: The casting is X-rayed using industrial radiography equipment (film or digital detectors) according to ASTM E94 or ASTM E1742 standards. "ASTM E155, E505 and E2422 only classify and
represents the highest level of discontinuity shown in the standard.
The serves as the primary benchmark for the radiographic inspection of aluminum and magnesium castings. By providing a series of reference radiographs, it allows inspectors to categorize and grade internal discontinuities, ensuring that cast components meet the rigorous safety and performance requirements of industries like aerospace and defense. What is ASTM E155?
These appear as dendritic, filamentary, or jagged darkened areas caused by the metal contracting during solidification. Microshrinkage: Classified into two types: Feathery: Elongated streaks resembling feathers.