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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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.
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 Ast for mechanically prepared surfaces, and Level J for welded surfaces. 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.
This abstract is a brief summary of the referenced standard. 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.
Gas Porosity – Indications of gas t the casing surface. Inserts – indications of chaplets sand core supports or internal chills.
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. Metal Removal Marks Thermal Dressing. Link to Active This link will always route to the current Active version ast 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 w802 to use.
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 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 or up to date. Expansion Discontinuities – slightly raised 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.
Fusion Discontinuities – surface irregularities giving a wrinkled appearance. Non-Metallic Inclusions asym Non-metallic material trapped on the surface of castings. Metal Removal Marks Welds – indications of welds fully or partially removed by thermal or mechanical dressing. Metal Removal Marks Mechanical Dressing.
Four levels of acceptance standards are provided. Surface Texture – the natural surface of the casting after shot blasting.
Historical Version s – view previous versions of standard. 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.