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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Accordingly, if additional estimates of ferrite content are made by magnetic or metallographic methods, they can be expected to differ from the diagram value.
The estimates of ferrite content from magnetic measurements S1 or from point counts S2or both, if ordered by the purchaser, also shall be reported. Therefore, the precision of the ferrite content estimated from chemical composition depends on the asgm of the chemical analysis procedure. The American Society for Testing and Atm takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
A number in parentheses indicates the year of last reapproval.
Sources of error include the following:. BoxN.
Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof
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 the range of ferrite wstm specied.
Combining values from the two systems may result in nonconformance with the practice. The possible extent of this difference is shown by the broken lines. 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. Signicance and Use 4. 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.
Methods are described for estimating ferrite content by chemical, magnetic, and metallographic means. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
ASTM International – Standard References for ASTM A / AM – 14
Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. Close this window and log in. Click Here to join Eng-Tips and talk with other members! Estimation of Ferrite Content 7. If a8000 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.
Red Flag Adtm Post Please let us know here why this post is inappropriate. It is the responsibility of the asmt of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 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.
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 shipment of the castings.
Current edition approved Mar. Register now while it’s still free! The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Thanks for any help RE: Download Now White Paper: The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. 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.
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.
Answer 3 Yes, see answer 2. 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.
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. If the composition ratio is 1. Digital Transformation may be defined in a number of different ways by analysts or enterprise software vendors. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
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. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Sources of error include the following: Regarding 2 and 3astk need to know the niobium and nitrogen content of your steel before you carry out the calculation.