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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ASTM , Ferrite content (CF8M) – Metal and Metallurgy engineering – Eng-Tips
Regarding 2 and 3you a800 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 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 content specified. All measurements shall be made on material after the solution heat treatment required by the applicable product specication, or, if any subsequent solution 8a00 treatment is employed, then after the nal solution heat treatment.
Accordingly, if additional estimates of ferrite content are made by magnetic or metallographic methods, they can be expected to differ from the diagram value.
Thanks for any help. 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! It’s easy to join and it’s free. Methods are described for estimating ferrite content by chemical, magnetic, and metallographic means.
Because of segregation, the chemical composition, and, therefore, the ferrite content, may differ from point to point on a casting. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at ast,faxor service astm.
Close this window and log in. The estimates of ferrite content from magnetic measurements S1 or from point counts S2or both, if ordered by the purchaser, also shall be reported. NOTE 1—There may be a substantial xstm in the ferrite content of weld deposits after solution heat treatment in comparison with the as-deposited value.
Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof
Answer 3 Yes, see answer 2. Red Flag This Post Please let us know here why this post is inappropriate. ASTM D e1.
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. zstm
Signicance and Use 4. Current edition approved Mar. Join your peers on the Internet’s largest technical engineering professional community. Link to Active This link will always route to the current Active version of the standard.
If a comparison is made of ferrite content estimated from a product analysis performed by the purchaser, with that astmm from the heat analysis see 7. Measurements may be made either before or after performance of the tension test. Download Now Defense manufacturing is all about project manufacturing and project accounting. The quantity of ferrite in the structure is fundamentally a function of the chemical composition of the alloy and its thermal history.
ASTM International – Standard References for ASTM A / AM – 14
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. Similar information is available in Table X1.
Combining values from the two systems may result in nonconformance with the practice. Click Here to join Eng-Tips and talk with other members!
Sources of error include the following: Sources of error include the following:. 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 astmm 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. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
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They shall not apply unless specied in the order, in which 8a00 the specied methods of ferrite content estimation shall be employed by the manufacturer before shipment of the castings.