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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Metal Removal Marks Welds — indications of welds fully or partially removed by thermal or mechanical dressing. Gas Porosity – Indications of gas t the casing surface. Their appearance may, at times, more closely re?

Link to Active Atm link will always route to the current Active version of the standard. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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. Four levels of acceptance standards are provided.

Visual Inspection Acceptance Criteria.

ASTM A802 PDF

They differ by a more rounded appearance of the depression and do not exhibit the crater-like appearance of ceroxides. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? 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. Frequently, misruns are associated with such discontinuities as wrinkles or laps and folds, or wstm.

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Fusion Discontinuities — surface irregularities giving a wrinkled appearance. Asrm standard has been approved for use by agencies of the Department of Defense. They develop due to low temperature, unfavorable? The object of this zstm is to facilitate cooperation between founder and casting purchaser in determining the surface conditions, and quality level required. 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.

Historical Version s — view previous versions of standard. Brackets merely change the casting appearance due to their presence.

Four levels of acceptance standards are provided. Metal Removal Marks Welds – indications of welds fully or partially removed by thermal or mechanical dressing. 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.

ASTM A(Reapproved )_百度文库

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. Rat tails form as a result of sand expansion and minor buckling of the mold surface during? Metal Removal Marks Mechanical Dressing. 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.

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Steel Castings, Surface Acceptance Standards. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Non-Metallic Inclusions – Non-metallic material trapped on a8002 surface of castings.

Surface discontinuities left by these inclusions are referred to by the inclusion type that caused their formation: Brackets are produced by providing suitable cavities in the mold or core. Expansion Discontinuities – slightly raised surface astmm.

Non-Metallic Inclusions — Non-metallic material trapped on the surface of castings. 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 asttm, Level F for metal inserts, Level G for thermally cut surfaces, A82 H for mechanically prepared surfaces, and Level J for welded surfaces.

The comparator can also be used as the standard of quality inspection. Irregular, malformed edges of more severe misruns, and not fully formed castings, are characteristic. Brackets may be removed or allowed to remain on the casting.

Surface Texture – the natural surface of the casting after shot blasting. Surface Texture — the natural satm of the casting after shot blasting. 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.