Astm E155 Porosity Levels Pdf Repack Access
ASTM E155 provides standard reference radiographs classifying aluminum and magnesium casting discontinuities into eight severity levels, where Level 1 denotes minimum, and Level 8 maximum, porosity. These levels are utilized for grading castings in acceptance standards such as ASTM B686, which requires specific ratings for Grades B, C, and D. For official standards and technical documents, visit ASTM International www.qgdigitalpublishing.com
The reference radiograph films are technically considered an adjunct to the written standard document and must be purchased separately from ASTM International. This separation is crucial to understand because many professionals mistakenly believe the written PDF alone contains the reference images.
Your report must state: "Evaluated per ASTM E155, porosity type fine, severity Level 2 maximum observed, thickness range 0.5-1.0 inch – meets Class B requirements." astm e155 porosity levels pdf repack
For each graded discontinuity type, the reference radiographs provide separate severity plates for both ¼‑inch and ¾‑inch thickness castings. For example, the Gas Porosity (Round) plates for aluminum castings in Volume I include specific designations such as d(P13) for 3/4-inch thickness and c(P7) for 1/4-inch thickness, with eight graded severity levels within each thickness category.
Whether you are developing a "PDF repack" reference document for training purposes, specifying acceptance criteria on engineering drawings, or implementing a radiographic inspection program, the key principles remain: understand the severity scale, apply the correct thickness reference, distinguish between discontinuity types, and remember that the acceptance level must be contractually agreed upon by all stakeholders. This separation is crucial to understand because many
Classify the porosity in your image:
ASTM E155 Discontinuity Levels Guide | PDF | Materials - Scribd Whether you are developing a "PDF repack" reference
Immediate visualization of what a "Level 3" porosity looks like compared to a "Level 5."
| Discontinuity Type | Description | |---|---| | | Appear as round or elongated, smooth-edged dark spots on radiographs, occurring singly, in clusters, or distributed throughout the casting | | Gas Porosity – Round (气体孔隙 – 圆形) | Corresponds to tiny spherical voids typically distributed throughout the casting | | Gas Porosity – Elongated (气体孔隙 – 拉长型) | Irregular gas voids with elongated shapes | | Microshrinkage – Feathery Type (微缩孔 – 羽毛型) | Elongated shrinkage porosity with a feather-like, striated appearance | | Microshrinkage – Sponge Type (微缩孔 – 海绵型) | More voluminous, equiaxed shrinkage porosity with a spongy radiographic appearance | | Foreign Material (Less Dense) (低密度夹杂物) | Irregular dark blotches corresponding to sand, slag, oxides, or dross of lower density than the base metal | | Foreign Material (More Dense) (高密度夹杂物) | Light areas on radiographs corresponding to high-density inclusions such as tungsten or other heavy metals |
For inspectors, engineers, and quality personnel, having quick access to via a PDF or interpreted repack guide is essential for determining whether a part meets acceptance criteria.
