ASTM A/AM: Standard Practice for Steel Castings, Surface Acceptance Standards, Visual Examination. Designation: A /A M – 95 (Reapproved ) Standard Practice for. Steel Castings, Surface Acceptance Standards, Visual Examination1 This standard. Designation: A /A M – 95 (Reapproved ) An American National Standard. Standard Practice for. Steel Castings, Surface Acceptance Standards, .
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Surface Texture – the natural surface of the casting after shot blasting. Metal Removal Marks Mechanical Dressing.
Fusion Discontinuities – surface irregularities giving a wrinkled appearance. Visual Inspection Acceptance Criteria. The use of the ashm is superior to methods based on photographs which can introduce uncertainties concerning interpretation, particularly with regards o the depth of surface irregularities. The object of this standard is to facilitate cooperation between founder and casting purchaser in determining the surface conditions, and quality level required.
Non-Metallic Inclusions – Non-metallic material trapped on the surface of castings. 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. This abstract is a brief summary of the referenced standard.
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.
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. Metal Removal Marks Thermal Dressing. Link to Active This link awtm always route to the current Active version of the standard.
Metal Removal Marks Atsm Dressing – surface remaining after using a mechanical means of dressing a cast surface or a previously thermally dressed surface. Expansion Discontinuities – slightly raised surface irregularities. Gas Porosity – Indications of gas t the casing surface. The comparator can also be used as the standard of quality inspection.
Inserts – indications of chaplets sand core supports or internal chills. 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. Historical Version s – view previous versions of standard.
This practice covers the standard acceptance criteria for the determination of surface texture, surface roughness, and surface discontinuities of steel castings by visual examination. Four levels of acceptance standards are provided. Metal Removal Marks Welds – indications of welds fully or partially removed by thermal or mechanical dressing.
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.
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.