: Some distributors offer the option to purchase a printed edition of the document along with a PDF for immediate download at a package price.
While ASTM E155 is a physical standard, industry professionals often search for an "ASTM E155 porosity levels PDF" or a "repack." It is crucial to understand the difference:
: For castings with varying discontinuity severity across different regions, the standard provides guidance on whether to evaluate each region individually or perform a comprehensive assessment. astm e155 porosity levels pdf repack
ASTM E155 is fundamentally a visual standard. Historically, it required buying actual film plates from ASTM International. Today, digital reference radiographs (ASTM E2422 for digital aluminum inspections) are standard.
: Caused by trapped gas (often hydrogen in aluminum). : Some distributors offer the option to purchase
Represents the highest quality casting with minimal, microscopic voids. This level is usually reserved for critical aerospace components subject to extreme fatigue and stress.
It provides a common language between the casting supplier and the purchaser regarding defect acceptance. Conclusion Historically, it required buying actual film plates from
ASTM E155 remains the cornerstone reference standard for radiographic evaluation of porosity and other discontinuities in aluminum and magnesium castings. Its eight-level severity grading system, organized across two thickness ranges and two volumes, provides a globally recognized framework for specifying acceptance criteria, training NDT personnel, and resolving quality disputes between purchasers and suppliers. For quality professionals, foundry engineers, and NDT inspectors, a thorough understanding of ASTM E155 porosity levels is not merely an academic exercise—it is an operational necessity for producing castings that meet demanding performance and safety requirements.
This "repack" is for educational and quick-reference purposes only. For official final acceptance decisions, always consult the original, current ASTM E155 standard document and adhere to your specific contract requirements.
The casting is subjected to X-ray or digital radiography (DR) according to standards like ASTM E1742 or ASTM E2422.