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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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Rat tails form as a result of sand expansion and minor buckling of the mold surface during? 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. 8a02 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.

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. A number in parentheses indicates the year of last reapproval.

Brackets may be removed or awtm to remain on the casting. 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 practice covers the standard acceptance criteria for the determination of surface texture, surface roughness, and surface discontinuities of steel castings by visual examination. Their appearance s802, at times, more closely re? Riser removal and machining may reveal shrinkage that extends from the interior of the casting to the near surface area.

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Link to Active This link will always route to the current Active version of the standard. 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.

Inserts – indications of chaplets sand core supports or internal chills. Visual Inspection Acceptance Criteria.

ASTM A802 PDF

Metal Removal Marks Welds — indications of welds fully or partially removed by thermal or mechanical dressing. Sometimes, a scab consists of a raised, rough area of essentially solid metal on the surface of asm casting. This standard has been approved for use by agencies of the Department of Defense. 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.

The crater-like aztm of the casting surface depression is typical. Ceroxides consist of a mixture of low-melting oxides and partially fused sand.

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. Frequently, misruns are associated with such discontinuities as wrinkles or laps and folds, or both. Steel Castings, Surface Acceptance Standards. Expansion Discontinuities — slightly raised surface irregularities. Non-Metallic Inclusions — Non-metallic material trapped on the surface of castings.

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The object of this standard is to facilitate cooperation between founder and casting purchaser in determining the surface conditions, and quality level required. This abstract is a brief summary of the referenced standard.

Current edition approved Sept. Gas Porosity — Indications of gas t the casing surface. Metal Removal Marks Mechanical Dressing. Metal Removal Marks Thermal Dressing. 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. Finer marks are produced with the abrasive cut-off wheel and grinding.

Metal Removal Marks Thermal Dressing. Irregular, malformed edges of more severe misruns, and not fully formed castings, are characteristic.

Wrinkles result from irregularities of the liquid metal? They develop due to low temperature, unfavorable?

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Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Expansion Discontinuities – slightly raised surface irregularities. Brackets have the same purpose but represent an integral part of the casting.