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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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.
Four levels of acceptance standards are provided.
ASTM A802 PDF
Four levels of acceptance standards are provided. The object of this standard is to facilitate cooperation between founder and casting purchaser in determining the surface conditions, and quality level required. 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.
Inserts — indications of chaplets sand core supports or internal chills. ASTM does not give any warranty express or implied ashm make any representation that the contents of this abstract are accurate, complete or up to date. a8022
Non-Metallic Inclusions — Non-metallic astmm trapped on the surface of castings. Surface Texture – the natural surface of the casting after shot blasting. The object of this standard is to facilitate cooperation between founder and casting purchaser in determining the surface conditions, and quality level required. Originally published as A — Their appearance may, at times, more closely re? A number in parentheses indicates the year of last reapproval.
Expansion Discontinuities — aatm raised surface irregularities. Expansion Discontinuities – slightly raised surface irregularities. Historical Version s — view previous versions of standard. Metal Removal Marks Welds — indications of welds fully or partially removed by thermal or mechanical dressing.
ASTM A(Reapproved )_百度文库
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Inserts – indications of chaplets sand core supports or internal chills. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. 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 have the same purpose but represent an integral part of the casting.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Gas Porosity — Indications of gas t the casing surface.
Asmt differ by a more rounded appearance of the depression and do not exhibit the crater-like appearance of ceroxides. Gas Porosity – Indications of gas t the casing surface. Metal Removal Marks Mechanical Dressing – surface remaining after using a mechanical means of dressing a cast surface or a previously thermally dressed surface. The comparator can also be used as the standard of quality inspection. This practice covers the standard acceptance criteria for the determination of surface texture, surface roughness, and surface discontinuities of steel castings ast visual examination.
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. Visual Inspection Acceptance Criteria. Finer marks are produced with the abrasive cut-off wheel and grinding. Metal Removal Marks Thermal Dressing.
Metal Removal Marks Mechanical Dressing. This standard has been approved for use by agencies of the Department of Defense.
They develop due to low temperature, unfavorable? Metal Removal Marks Thermal Dressing. Incomplete fusion due to low liquid steel wstm and prevailing? Fusion Discontinuities – surface irregularities giving a wrinkled appearance. Wrinkles result from irregularities of the liquid metal?
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