In the world of non-destructive testing (NDT) and casting inspection, few standards are as critical as ASTM E155. This standard governs the reference radiographs for inspection of aluminum and magnesium castings. For quality assurance managers, NDT technicians, and foundry engineers, understanding the specific porosity levels defined by this standard is non-negotiable.
"Blind porosity" (viods open to only one surface) can trap cleaning solutions, leading to corrosion or bubbling during secondary treatments like powder coating. Digital Inspection Standards astm e155 porosity levels pdf repack
Minute voids distributed throughout the casting, appearing as small round dots. Gas Porosity (Elongated) Mastering ASTM E155 Porosity Levels: The Ultimate Guide
This summary document condenses the visual data you actually need for porosity grading. It breaks down the two main types of gas porosity you encounter in light alloy castings: "Blind porosity" (viods open to only one surface)