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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This standard has been approved for use by agencies of the Department of Defense. Four levels of acceptance standards are provided.

ASTM A(Reapproved )_百度文库

Riser removal and machining may reveal shrinkage that extends from the wstm of the casting to the near surface area. Sometimes, a scab consists of a raised, rough area of essentially solid metal on the surface of a casting. Non-Metallic Inclusions – Non-metallic material trapped on astn surface of castings.

Metal Removal Marks Welds – indications of welds fully or partially removed by thermal or mechanical dressing. The comparator can also be used as the standard of quality inspection. Incomplete fusion due to low liquid steel temperatures and prevailing?

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. 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.

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Your comments are invited either for revision of this standard or q802 additional standards and should be addressed to ASTM International Headquarters. Fusion Discontinuities — surface irregularities giving a wrinkled appearance. ASTM does not give any x802 express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

The crater-like appearance of the casting surface depression is typical. Gas Porosity — Indications of gas t the casing surface.

Brackets may be removed or allowed to remain on the casting. Metal Removal Marks Mechanical Dressing — surface remaining after using a mechanical means of dressing a cast surface or a previously thermally dressed surface. Originally published as A — 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, and learn about the requirements.

This practice covers the standard acceptance criteria for the determination of surface texture, surface roughness, and surface discontinuities of steel castings by visual examination. 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.

Brackets have the same purpose but represent an integral part of the casting. Frequently, misruns are associated with such discontinuities as wrinkles or laps and folds, or both. Historical Version s — view previous versions of standard. Metal Removal Marks Mechanical Dressing. Fusion Discontinuities – surface irregularities giving a wrinkled appearance. 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.

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Expansion Discontinuities – slightly raised surface irregularities. Ceroxides consist of a mixture of low-melting oxides and partially fused sand.

Metal Removal Marks Thermal Dressing. Current edition approved Sept.

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in a8022 standard. The comparator can also be used as the standard of quality inspection. 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.

ASTM A802 PDF

This practice covers the standard acceptance criteria for the determination of surface texture, surface roughness, and surface discontinuities of steel castings by visual examination. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Brackets merely change the casting appearance due to their presence.