Appears as round or elongated dark spots. These are typically minute voids distributed throughout the entire casting.
Understanding ASTM E155 Porosity Levels: A Comprehensive Guide
ASTM E155 Discontinuity Levels Guide | PDF | Materials - Scribd astm e155 porosity levels pdf repack
Massive, equiaxed voids with a sponge-like appearance. The Eight Levels of Severity
Formally titled the , this document illustrates the various types and degrees of discontinuities—commonly referred to as defects—found in these specific alloys. Appears as round or elongated dark spots
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.
It covers casting thicknesses of 1/4 inch (6.35 mm) and 3/4 inch (19.1 mm) . The Eight Levels of Severity Formally titled the
For digital radiography, professionals must refer to ASTM E2422 (aluminum) or ASTM E2869 (magnesium) rather than the physical films of E155. Porosity and Discontinuity Types
The full standard consists of physical reference plates (radiographs) that show eight levels of severity for different defect types.