ASTM A/AM: Standard Practice for Steel Castings, Surface Acceptance Standards, Visual Examination. 55, ASTM A, BNIF , and GAR C9 Comparator, among others . Inspectors use comparators and images in these methods to visually classify the . Designation: A /A M – 95 (Reapproved ) An American National Standard. Standard Practice for. Steel Castings, Surface Acceptance Standards, .
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Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Inserts – indications of chaplets sand core supports or internal chills. The crater-like appearance of the casting surface depression is x802. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
It is the responsibility of the user of this standard to a8022 appropriate safety and health practices and determine the aetm of regulatory limitations prior to use. Finer marks are produced with the abrasive cut-off wheel and grinding. A awtm in parentheses indicates the year of last reapproval.
Wrinkles result from irregularities of the liquid metal? Irregular, malformed edges of more severe misruns, and not fully formed castings, are characteristic. Their appearance may, at times, more closely re? The resulting asgm appearance is characterized by rounded edges, for a mild degree of misrun.
Brackets may be removed or allowed to remain on the casting. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. It should assist in avoiding misunderstanding arising from imprecise descriptions at the order stage and should also help in defining a surface that is amendable to a particular techniques of non-destructive testing.
Metal Removal Marks Thermal Dressing. Fusion Discontinuities — surface irregularities giving a wrinkled appearance. Metal Removal Marks Welds – indications of welds fully or partially removed by thermal or mechanical dressing.
ASTM A802 PDF
Individual reprints single or multiple copies of this standard awtm be obtained by contacting ASTM at the above address or at phonefaxor service astm. Metal Removal Marks Mechanical Dressing – surface remaining after using a mechanical means of dressing a cast surface or a previously thermally dressed surface. This standard has been approved for use by agencies of the Department of Defense.
The use of the comparators is superior to methods based on photographs which can introduce uncertainties concerning interpretation, particularly with regards o the depth of surface irregularities. Metal Removal Marks Mechanical Dressing.
ASTM A(Reapproved )_百度文库
The comparator can also be used as the standard of quality inspection. They differ by a more rounded appearance of the depression and do not exhibit the crater-like appearance of ceroxides.
Work Item s – proposed revisions of this standard. Current edition approved Sept. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Four levels of acceptance standards are provided. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
This abstract is a brief summary of the referenced standard. Frequently, misruns are associated with such discontinuities as wrinkles or laps and folds, or both. This practice covers the standard acceptance criteria for the determination of surface texture, surface roughness, and surface discontinuities of steel castings by visual examination.
Expansion Discontinuities — slightly raised surface irregularities. Level A for surface texture, Level B for nonmetallic inclusions, Level C for gas porosity, Level D for solidification discontinuities, Level E for sand expansion discontinuities, Level F for metal inserts, Level G for thermally cut surfaces, Level H for mechanically prepared surfaces, and Level J for welded surfaces.
Originally published as A — Level A for surface texture, Level B for nonmetallic inclusions, Level C for gas porosity, Level D for solidification discontinuities, Level E for sand expansion discontinuities, Level F for metal inserts, Level G for thermally cut surfaces, Level H for mechanically prepared surfaces, and Level J for welded surfaces. Incomplete fusion due to low liquid steel temperatures and prevailing?
Brackets are produced by providing suitable cavities in the mold or core. Non-Metallic Inclusions – Non-metallic material trapped on the surface of castings. External chills may produce? It should assist in avoiding misunderstanding arising from imprecise descriptions at the order stage and should also help in defining a surface that is amendable to a particular techniques of non-destructive testing. Fusion Discontinuities – surface irregularities giving a wrinkled appearance.