Shrinkage-related discontinuities result from inadequate metal feed during solidification. ASTM E155 distinguishes between:

Often caused by trapped hydrogen during melting or pouring. ASTM E155 provides images to distinguish between fine, medium, and coarse gas porosity. Gas Holes: Larger, isolated pockets of gas. 3. Application of Levels

The standard provides reference radiographs for inspecting aluminum and magnesium alloy castings. These radiographs serve as a visual baseline for evaluating the severity of internal discontinuities like gas porosity, shrinkage, and foreign materials. Porosity Classification and Severity Levels

Astm E155 Porosity Levels Pdf Repack 2021

Shrinkage-related discontinuities result from inadequate metal feed during solidification. ASTM E155 distinguishes between:

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