ASTM A - Download as PDF File .pdf), Text File .txt) or read online. ASTM A ASTM A pdf - Download as PDF File .pdf), Text File .txt) or read online. This standard is issued under the fixed designation A/AM; the number 1 This practice is under the jurisdiction of ASTM Committee A05 on Metallic-.

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    Astm A143 Download

    Sign In · View Account▹ · Home; ASTM A/AM() Add to Cart. Printed Edition + PDF; Immediate download; $; Add to Cart. ASTM A - Designation: A – 01 Standard Practice for Safeguarding Against Embrittlement o. Practice ASTM A provides guidance on safeguarding against warpage and be stress relieved per the guidelines provided within ASTM A, Section 6.

    A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the Department of Defense. Scope 1. Conditions of fabrication may induce a susceptibility to embrittlement in certain steels which can be accelerated by galvanizing. Embrittlement is not a common occurrence, however, and this discussion does not imply that galvanizing increases embrittlement where good fabricating and galvanizing procedures are employed.

    Failure of either the second or the third specimen shall be cause for rejection of the lot see Note 1 that the samples represent. NOTE 1—A lot is a unit of production from which a sample may be taken for testing.

    Unless otherwise agreed upon by the manufacturer and the purchaser, or established within this speci? For test by purchaser after delivery, the lot consists of the single order or the single delivery load, whichever is the smaller, unless the lot identity, established in accordance with the above, is maintained and clearly indicated in the shipment by the manufacturer.

    ASTM Hydrogen Embrittlement Standard

    In the case of previously bent articles such as reinforcing bars, the test shall be accomplished by reverse bending the previously bent section. The galvanized article should withstand a degree of bending substantially the same as the ungalvanized article.

    Flaking or spalling of the galvanized coating is not to be construed as an embrittlement failure. For threaded articles, the test shall be made on the unthreaded portion. If the article withstands such a blow in the ungalvanized condition, but after galvanizing cracks under the blow, it shall be considered embrittled. A hole shall be made in the test specimen at its midlength, using the same procedure as will be employed in the fabricated material which the specimen represents, whether this be by punching, punching and reaming, or drilling.

    The dimensional values, diameter, and location of hole shall be not less than those employed in the structural details. Care should be taken not to place the hole near stamped or rolled-in identi? The specimen shall then be galvanized.

    For determining the elongation after fracture, a 2-in. For specimens under 1? The length of the test specimen and the distance between the supports are shown in the following table: Leg of Angle, l, in.

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    The percentage reduction of thickness shall be calculated on the basis of the original thickness of the angle and the average of the three values at a, b, and c. The sum of the percentage of elongation plus the average percentage reduction of thickness shall not be less than Up to 4 , incl Over 4 to 6 to , incl Over 6 to 8 to , incl 18 24 36 8.

    Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

    Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

    The aging changes accelerated by galvanizing. The indication that no embrittlement problem is to be expected for susceptibility to hydrogen embrittlement is influenced by the those steels, processes, and galvanizing procedures. In the case of galvanized steel, the acid as the standard. However, the heat of the galvanizing bath safety concerns, if any, associated with its use. It is the partially expels hydrogen which may have been absorbed.

    In responsibility of the user of this standard to establish appro- practice hydrogen embrittlement of galvanized steel is usually priate safety and health practices and determine the applica- of concern only if the steel exceeds approximately ksi bility of regulatory limitations prior to use.

    Terminology 3. An embrittled product characteristically fails by fracture and is accentuated by areas of stress concentration such as without appreciable deformation. Types of embrittlement usu- caused by notches, holes, fillets of small radii, sharp bends, etc.

    The rate at which this temperature loss of ductility occurs 1 varies for different steels. The expected service temperature This practice is under the jurisdiction of ASTM Committee A05 on Metallic Coated Iron and Steel Products and is the direct responsibility of Subcommittee should thus be taken into account when selecting the steel. Prepared by Subcommittee A See Proceedings, Am. Testing Mats. Published December Origi- 5.

    Last previous edition A — 74 Reapproved These criteria generally depend on the bility of the designer and fabricator. The galvanizer shall direction of grain, strength, and type of steel. A cold bending employ proper pickling and galvanizing procedures.

    If one test specimen should be found embrittled by shop practice. NOTE 1—A lot is a unit of production from which a sample may be taken for testing.

    Unless otherwise agreed upon by the manufacturer and 6. However, if required, proper thermal treatment shall of the same type and size comprising a single order or a single delivery precede galvanizing of the steel. For heavy cold deformation load, whichever is the smaller, or a smaller number of articles identified as exemplified by cold rolling, sheared edges, punched holes, or a lot by the manufacturer, when these have been galvanized within a single production shift.

    The length of the test specimen and the distance whichever is less. The galvanized article should withstand a between the supports are shown in the following table: degree of bending substantially the same as the ungalvanized Leg of Angle, l, in.

    Flaking or spalling of the galvanized coating is not to see Fig. For threaded articles, Up to 4 [], incl 14 [] 18 [] the test shall be made on the unthreaded portion.

    ASTM A Recommendations | American Galvanizers Association

    Over 4 to 6 [ to ], incl 20 [] 24 [] Over 6 to 8 [ to ], incl 30 [] 36 [] 9. If the article withstands fracture shall be measured to 0. The percentage reduction of thickness shall be steel angle before galvanizing.

    A hole shall be made in the test calculated on the basis of the original thickness of the angle specimen at its midlength, using the same procedure as will be and the average of the three values at a, b, and c. Care should be taken not to place the hole dance with 9. For determining the elongation after the reduction in thickness shall be measured in accordance with fracture, a 2-in. The sum of the percentage of elongation plus the punched in the middle of the edge of the vertical leg of the average percentage reduction of thickness shall not be less than galvanized angle along a line parallel to its length and centered Keywords Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

    This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn.

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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.

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