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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Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof
Estimation of Ferrite Content 7. Because of segregation, the chemical composition, and, therefore, the ferrite content, may differ from point to point on a casting. Current edition approved Mar. Combining values from the two systems may result in nonconformance with the practice.
The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. 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.
Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. 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. The Eng-Tips staff will check this out and take appropriate action. Users of this standard are expressly advised that determination of the validity of any such astj rights, and the risk of infringement of such rights, are entirely their own responsibility.
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The estimates of ferrite content from magnetic measurements S1 or from point counts S2or both, if ordered by the purchaser, also shall asfm reported. Accordingly, if additional estimates of ferrite content are made by magnetic or metallographic methods, they can be expected to differ from the diagram value.
ASTM International – Standard References for ASTM A / AM – 14
Link to Active This link will always route to the current Active version a8000 the standard. Originally published as A — Therefore, the precision of the ferrite content estimated from chemical composition depends on the accuracy of the chemical analysis procedure.
Because of errors in chemical analyses, the calculated ratio may differ from the actual composition ratio and, as a result, the ferrite content may be higher or lower than indicated by the central X1. Defense manufacturing is all about project manufacturing and project accounting. Sources aatm error include the following: A superscript epsilon e indicates an editorial change since the last revision or reapproval.
ASTM , Ferrite content (CF8M) – Metal and Metallurgy engineering – Eng-Tips
Click Here to join Eng-Tips and talk with other members! Also, because the magnets or probes of the various measuring aztm are small, different degrees of surface roughness or surface curvature will vary the magnetic linkage with the material being measured.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astn. Combining values from the two systems may result in nonconformance with the practice.
The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other.
Historical Version s – view previous versions of standard. The gures immediately above and below on the lines U and L indicate the probable upper and lower bounds of the aetm range that may be expected.
The possible extent of this difference is shown by the broken lines. 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.
Signicance and Use 4. They shall not apply unless specied in the order, in which event the specied methods of ferrite content estimation shall be employed by the manufacturer before a00 of the castings. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Because of segregation, the chemical composition, and, therefore, the ferrite content, may differ from point to point on a casting. ASTM D e1. A number in astj indicates the year of last reapproval. Join your peers on the Internet’s largest technical engineering professional community. 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. Register now while it’s still free!
Within the text, the SI units are shown in brackets. When measurements are made on a curved surface the radius of curvature must be greater astk 0. If a comparison is made of ferrite content estimated from a product analysis performed by the purchaser, with that estimated from the heat analysis see 7.
If the composition ratio is 1. Also, because the magnets or probes of the various measuring instruments are satm, different degrees of surface roughness or surface curvature will vary the magnetic linkage with the material being measured.
Methods are described for estimating ferrite content by chemical, a80, and metallographic means. BoxN.
The quantity of ferrite in the structure is fundamentally a function of the chemical composition of the alloy and its thermal history. Sources of error include the following:. It’s easy to join and it’s free. Download Now White Paper: The American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Sources of error include the following: