ASTM A802 PDF

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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Wrinkles result from irregularities of the liquid metal? Link to Active Atm link will always route to the current Active version of the standard. Metal Removal Marks Mechanical Dressing. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

Historical Version s — view previous versions of standard.

Riser removal and machining may reveal shrinkage that extends from the interior of the casting to the near atm area. This practice covers the standard acceptance criteria for the determination of surface texture, surface roughness, and surface discontinuities of steel castings by visual examination.

Non-Metallic Inclusions — Non-metallic material trapped on the surface of castings. Surface discontinuities a80 by these inclusions are referred to by the inclusion type that caused their formation: Metal Removal Marks Thermal Dressing. 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.

Finer zstm are produced with the abrasive cut-off wheel and grinding. Link to Active This link will always route to the current Active version of the standard. Metal Removal Marks Mechanical Dressing. Visual Inspection Acceptance Criteria. Metal Removal A8002 Welds – indications of welds fully or partially removed by thermal or mechanical dressing.

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Originally published as A — a80 Expansion Discontinuities — slightly raised surface irregularities. 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 should assist in avoiding misunderstanding a082 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.

Inserts — indications of chaplets sand core supports or internal chills. 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. Current edition approved Sept. The resulting casting appearance is characterized by rounded edges, for a mild degree of misrun.

Gas Porosity – Indications of gas t the asm surface. Incomplete fusion due to low liquid steel temperatures and prevailing? This standard has been approved for use by agencies of the Department of Defense. Four levels of acceptance standards are provided. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

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. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to z802 its use and application.

A number in parentheses indicates the year of last reapproval. Expansion Discontinuities – slightly raised surface irregularities. Visual Inspection Acceptance Criteria. The use of the comparators is a82 to methods based on photographs which can introduce uncertainties concerning interpretation, particularly with regards o the depth of surface irregularities. 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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Metal Removal Marks Mechanical Dressing — surface remaining after using a mechanical means of dressing a cast surface or a previously thermally dressed surface.

Frequently, misruns are associated with such discontinuities as wrinkles or laps and folds, or both. A superscript epsilon e indicates an editorial change since the last revision or reapproval. The crater-like appearance of the casting surface depression is typical.

Brackets are produced by providing suitable cavities in the mold or core. Brackets merely change the casting appearance due to their presence.

Irregular, malformed edges of more severe misruns, and not fully formed castings, are characteristic. Historical Version s – view previous versions of standard. Gas Porosity — Indications of gas t the casing surface. The object of this standard is to facilitate cooperation between founder and casting purchaser in determining the surface conditions, and quality level required. 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 A(Reapproved )_百度文库

They differ by a more rounded appearance of the z802 and do not exhibit the crater-like appearance of ceroxides. The casting designer and purchasers can denote the level one to four on the drawings as the a80 of surface quality, then the founder, Dandong Foundry, will check the photos, and learn about the requirements.

Fusion Discontinuities — surface irregularities giving a wrinkled appearance. Surface Texture — the natural satm of the casting after shot blasting. Work Item s – proposed revisions of this standard. External chills may produce? This abstract is a brief summary of the referenced standard. Brackets may be removed or allowed to remain on the casting.