ASTM A – Designation: A /A M – 01 An American National Standard Standard Practice f. This standard is issued under the constant designation a /a m; the number right away following the designation suggests the yr. according to the guidelines of ASTM E, “Standard Guide for ASTM A, “Standard Practice for Steel Casting, Austenitic Alloy.
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Methods are described for estimating ferrite content by chemical, magnetic, and metallographic means. NOTE 1—There may be a substantial decrease in the ferrite content of weld deposits after solution heat treatment in comparison with the as-deposited value.
The gures immediately above and below on the lines U and L indicate the probable upper and lower bounds of the ferrite range that may be expected. If a tension test is not required by the applicable product specication, measurements may be made on a specimen cut from a keel block of a design in Fig.
Because of segregation, the chemical composition, and, therefore, the ferrite content, may differ from point to point on a casting.
Ast, if additional estimates of ferrite content are made by magnetic or metallographic methods, they can be expected to differ from the diagram value. Because of segregation, the chemical composition, and, therefore, the ferrite content, may differ from point to point on a casting. Similar information is available in Table X1.
ASTM International – Standard References for ASTM A / AM – 14
Thanks for any help RE: Sources of error include the following: 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. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The Eng-Tips staff will check this out and take appropriate action. These may so alter the magnetic response of the alloy that the indicated ferrite content is quite different from that of the same chemical composition that has undergone different thermal treatment.
ASTM D e1. Close this window and log in. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM A800. Determination of the ferrite content by any of the procedures described in the following practice is subject to varying degrees of imprecision which must be recognized in setting realistic limits on ast, range of ferrite content specied. Resources Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors.
Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof
Sources of error include the following: Therefore, the precision of the ferrite content estimated from chemical composition depends on the accuracy of the chemical analysis procedure. Defense manufacturing is all about project manufacturing and a80 accounting. Signicance and Use 4. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. Answer 3 Yes, see answer 2.
ASTM , Ferrite content (CF8M) – Metal and Metallurgy engineering – Eng-Tips
This may be formed upon solidication from the molten metal delta axtm or by transformation from austenite or sigma phase on cooling in the solid state alpha ferrite. The estimates of ferrite content from magnetic measurements S1 or from point counts S2or both, if ordered by the purchaser, also shall be reported.
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If the composition ratio is 1. Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. It’s easy to join and it’s free. Promoting, selling, recruiting, coursework and thesis posting is forbidden. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. Combining values from the two systems may result in nonconformance with the practice.
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When measurements are made on a curved surface the radius of curvature must be greater than 0. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn.
The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Current edition approved Mar.
The possible extent of this difference is shown by the broken lines. All measurements shall be made on material after the solution heat treatment required by the applicable product specication, or, if any subsequent solution heat treatment is employed, then after the nal solution heat treatment. Originally published as A — A number in parentheses indicates the year of last reapproval. The ferrite content may be limited by purchase order requirements or by the design construction codes governing the equipment in which the castings will be used.
Within the text, the SI units are shown in brackets.