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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Irregular, malformed edges of more severe misruns, and not fully formed castings, are characteristic. The resulting casting appearance is characterized by rounded edges, for a mild degree of misrun. The casting designer and purchasers can denote the level one to four on the drawings as the requirements of surface quality, then the founder, Dandong Foundry, will check the photos, a820 learn about the requirements.
ASTM A802 PDF
Visual Inspection Acceptance Criteria. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
The object of this standard is to facilitate cooperation between founder and adtm purchaser in determining the surface conditions, and quality level required. External chills may produce? Expansion Discontinuities — slightly raised surface irregularities. Historical Version s – view previous versions of standard. Metal Removal Marks Mechanical Dressing.
They differ by a more rounded appearance of the depression and do not exhibit the crater-like appearance of ceroxides.
Link to Active This link will always route to the current Active version of the standard. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date. 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. Current edition approved Sept.
Finer marks are produced with the abrasive cut-off wheel asstm grinding. ASTM International takes no position atsm the validity of any patent rights asserted in connection with any item mentioned in this standard.
Fusion Discontinuities – surface irregularities giving a wrinkled appearance. Brackets merely change the casting appearance ast to their x802. Riser removal and machining may reveal shrinkage that extends from the interior of the casting to the near surface area.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Steel Castings, Surface Acceptance Standards. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
Ceroxides consist of a mixture of low-melting oxides and partially a80 sand. Brackets are produced by providing suitable cavities in the mold or core. 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.
Brackets may be removed or allowed to asmt on the casting. 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 axtm inserts, Level G for thermally cut surfaces, Level H for mechanically prepared surfaces, and Level J for welded surfaces. Surface Texture — the natural satm of the casting after shot blasting.
Inserts — indications of chaplets sand core supports or internal chills. The crater-like appearance of the casting surface depression is typical. This abstract is a brief summary of the referenced standard. This practice covers the standard acceptance criteria for the determination of surface texture, surface roughness, and surface discontinuities of steel castings by visual sstm.
This abstract is a brief summary of the referenced standard. The comparator can also be used as the standard of quality inspection. Metal Removal Marks 8a02 Dressing. Metal Removal Marks Mechanical Dressing. Originally published as A — 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.
Gas Porosity – Indications of gas t the casing surface. Their appearance may, at times, more closely re? This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. Sometimes cracks are referred to as cold, hot, or heat treat-cracks to indicate the condition of the castings, or the operation during which the cracks occur. Causes are improper closing of the mold, insufficient weighting or clamping of the mold for pouring, or uneven pattern surfaces at the matching locations.
The object of this standard is to facilitate cooperation between founder and casting purchaser in determining the surface conditions, and quality level required. Fusion Discontinuities — surface irregularities giving a wrinkled appearance. Four levels of acceptance standards are provided.
ASTM A(Reapproved )_百度文库
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. 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. Gas Porosity — Indications of gas t the casing surface.