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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Users of this standard are expressly advised that determination aastm the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard is subject to revision at aetm time by the responsible technical committee and must be reviewed every?
Metal Removal Marks Thermal Dressing. 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. 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.
Expansion Discontinuities — slightly raised surface irregularities. This practice covers the standard acceptance criteria for the determination of surface texture, surface roughness, and surface discontinuities of steel castings by visual examination.
ASTM A802 PDF
Sometimes, a scab consists of a raised, rough area of essentially solid metal on the surface of a casting. 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.
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. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Historical Version s – view previous versions of standard. Fusion Discontinuities – surface irregularities giving a wrinkled appearance. Finer marks are produced with the abrasive cut-off wheel and grinding.
Gas Porosity — Indications of gas t the casing surface. Ceroxides consist of a mixture of low-melting oxides and partially fused sand. Metal Removal Marks Mechanical Dressing — surface remaining after using a mechanical means of dressing a cast surface or a previously thermally dressed surface.
They develop due to low temperature, a820 Expansion Discontinuities – slightly raised surface irregularities.
The resulting casting appearance is characterized by rounded edges, for a mild degree of misrun. Originally published as A — Brackets merely change the casting appearance due to their presence.
Irregular, malformed edges of more severe misruns, and not fully formed castings, are characteristic. It is the responsibility of the user of this standard to atsm appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Link to Active This link will always route to the current Active version of the standard. 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.
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 asfm. Steel Castings, Surface Acceptance Standards. Wrinkles result from irregularities of the liquid metal?
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.
Visual Inspection Acceptance Criteria.
ASTM A(Reapproved )_百度文库
They differ by q802 more rounded appearance of the depression and do not exhibit the crater-like appearance of ceroxides. Surface Texture — the natural satm of the casting after shot blasting.
Rat tails form as a result of sand expansion and minor buckling of the mold surface during? 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.