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):||22 August 2015|
|PDF File Size:||11.7 Mb|
|ePub File Size:||13.75 Mb|
|Price:||Free* [*Free Regsitration Required]|
They differ by a more rounded appearance of the depression and do not exhibit the crater-like appearance of ceroxides. Ceroxides consist of a mixture of low-melting oxides and partially fused sand. 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.
Irregular, malformed edges of more severe misruns, and not fully formed castings, are characteristic. 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.
The crater-like appearance of the casting surface depression is typical. 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.
Metal Removal Marks Thermal Dressing. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
It should assist in avoiding misunderstanding arising from imprecise descriptions at the order stage and should astmm help in defining a surface that is amendable to a particular techniques of non-destructive testing. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. It is informational only and not an official part z802 the standard; the full text of the standard itself must be referred to for its use and application.
Surface Texture – the natural surface of the casting after shot blasting.
ASTM A(Reapproved )_百度文库
Historical Version s — view previous versions of standard. Current edition approved Sept. Non-Metallic Inclusions — Non-metallic material trapped on the surface of castings.
Surface discontinuities left by these inclusions are w802 to by the inclusion type that caused their formation: This abstract is a brief summary of the referenced standard.
ASTM A802 PDF
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. 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.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Riser removal and machining may reveal shrinkage that extends from the interior of the casting to the near surface area. Four levels of acceptance standards are provided.
The use of the comparators is superior to methods based on photographs which can introduce uncertainties concerning interpretation, particularly with regards o the ast, of surface irregularities. Link to Active This link will always route to the current Active version of the standard. The comparator can also be used as the standard of quality inspection. Originally published as A — The object of this standard is to facilitate cooperation between founder and casting purchaser in determining the surface conditions, and quality level required.
Rat tails form as a result of sand expansion and minor buckling of the mold surface during? It is informational only and not an official part of the standard; qstm full text of the qstm itself must be referred to for its use and application.
The casting designer and purchasers can denote the level one to four on the drawings as the requirements of surface asfm, then the founder, Dandong Foundry, will check the photos, and learn about the requirements.
Work Item s – proposed revisions of this standard. Brackets have the same purpose but represent an integral part of the casting. Expansion Discontinuities – slightly raised surface irregularities. Their appearance may, at times, more closely re? Metal Removal Marks Welds – indications of welds fully or partially removed by thermal or mechanical dressing. Four levels of acceptance standards are provided.