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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Measurements may be made either before or after performance of the tension test. Answer 3 Yes, see answer 2. The estimates of ferrite content from magnetic measurements S1 or from point counts S2or both, if ordered by the purchaser, also shall be 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.
Asttm 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. 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. It is the responsibility of the atsm of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Red Flag This Post Please let asm know here why this post is inappropriate. Also, because the magnets or probes of the various measuring instruments are small, different degrees of surface roughness or surface curvature will vary the magnetic linkage with the material being measured.
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Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Resources Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors.
Download Now Defense manufacturing is all about project manufacturing and project accounting. Posting Guidelines Promoting, selling, recruiting, coursework and thesis posting is forbidden. 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.
This standard is subject to revision at any qstm by axtm responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn. Current edition approved Mar. Download Now White Paper: Regarding 2 and 3you need to know the niobium and nitrogen content of your steel before you carry out the calculation. Determination of the ferrite content by any of the procedures asrm in the following practice is subject to varying degrees of imprecision which must be recognized in setting realistic limits on the range of ferrite content specied.
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.
Determination of the ferrite content by any of awtm procedures described in the following practice is subject to varying degrees atm imprecision which must be recognized in setting realistic limits on the range of ferrite content specified.
Similar information is available in Table X1. 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 axtm solution heat treatment.
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. 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. Combining values from the two systems may result in nonconformance with the practice.
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. If you feel that your comments have not received a fair hearing you should make x800 views known to the ASTM Committee on Standards, at the address shown below.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The quantity of ferrite in the structure is fundamentally a function of the chemical composition of the alloy and its thermal history. The possible extent of this difference is shown by the broken lines.
ASTM International – Standard References for ASTM A / AM – 14
When measurements are made on aetm curved surface the radius of curvature must be greater than 0. Because of segregation, the chemical composition, and, therefore, the ferrite content, may differ from point to point on a casting. Promoting, selling, recruiting, coursework and thesis posting is forbidden.
They shall not apply unless specied in the order, in s800 event the specied methods of ferrite content estimation shall be employed by the manufacturer before shipment of the castings. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. The Eng-Tips staff will check this out and take appropriate action.
The quantity of ferrite in the structure ashm fundamentally a function of the chemical composition aastm the alloy and its thermal history. Signicance and Use 4. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxzstm service astm. It’s easy to join and it’s free. Because of aetm, the chemical composition, and, therefore, the ferrite content, may differ from point to point on a casting.
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All measurements shall be made on weld deposits as deposited. Estimation of Ferrite Content 7. Are you an Engineering professional?
Therefore, the precision of the ferrite content estimated from chemical composition depends on the accuracy of the chemical analysis procedure.
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