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, .
|Published (Last):||8 June 2008|
|PDF File Size:||1.17 Mb|
|ePub File Size:||14.72 Mb|
|Price:||Free* [*Free Regsitration Required]|
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. 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. Surface discontinuities left by these inclusions are referred to by the inclusion type that caused their formation: Low liquid metal temperature and unfavorable?
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. Four levels of acceptance standards are provided. 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. Steel Castings, Surface Acceptance Standards.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Wrinkles result from irregularities of the liquid metal? 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.
Historical Version s — view previous versions of standard. Gas Porosity – Indications of gas t the casing surface. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
ASTM A802 PDF
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine a80 applicability of regulatory limitations prior to use. Four levels of acceptance standards are provided. Non-Metallic Inclusions – Non-metallic material trapped on the surface of castings.
A number in parentheses indicates the year of last reapproval.
ASTM A(Reapproved )_百度文库
Link to Active This link will always route to the current Active version of the standard. 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. 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.
Gas Porosity — Indications of gas t the casing surface. Irregular, malformed edges of more severe misruns, and not fully formed castings, are characteristic.
The comparator can also be used as the standard of quality inspection. Metal Removal Marks Thermal Dressing. The object of this standard is to facilitate cooperation between founder and casting purchaser in determining the surface conditions, and quality level required. This practice covers the standard acceptance criteria for the determination of surface texture, surface roughness, and surface discontinuities of steel castings by visual examination.
Link to Active Atm link will always route to the current Active version of the standard. They differ by a more rounded appearance of the depression and do not exhibit the crater-like appearance of ceroxides. 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.
Frequently, misruns are associated with such discontinuities as wrinkles or laps and folds, or both. Surface Texture – the natural surface of the casting after shot blasting. Fusion Discontinuities — surface irregularities giving a wrinkled appearance.
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 does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete aetm up to date. This standard has been approved for use by agencies of the Department of Defense. Brackets have the same purpose but represent an integral part of the casting. Rat tails form as a result of sand expansion and minor aztm of the mold surface during? This abstract is a brief summary of the referenced standard.
Visual Inspection Acceptance Criteria. The object of this standard is to facilitate cooperation between founder and casting purchaser in determining the surface conditions, and quality level required. 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 metal inserts, Level G for thermally cut surfaces, Level H for mechanically prepared surfaces, and Level J for welded surfaces.
Ceroxides consist of a mixture of low-melting oxides and partially fused sand.