ASTM A800 PDF

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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A number in parentheses indicates the year of last reapproval. Register now while it’s still free! Originally published as A — Thank you for helping keep Eng-Tips Forums free from inappropriate 8a00. By joining you are opting in to receive e-mail. 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 specied.

Methods are described for estimating ferrite content by chemical, magnetic, and metallographic means. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are atm provided as part of the standard. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Therefore, the precision of the ferrite content estimated from chemical composition depends on the accuracy of the chemical analysis procedure.

Sources of error include the following: Answer 3 Yes, see answer 2.

The Eng-Tips staff will check this out and take appropriate action. Regarding 2 and 3you need to know the niobium and nitrogen content of your steel before you carry out the calculation. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

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Close this window and log in. If the composition ratio is 1. Click Here to join Eng-Tips and talk with other members! Link to Active This link will always route to the current Active version of the standard. 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.

Standard Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof

Sources of error include the following: Determination of the ferrite content by any of the procedures described in the following practice asttm subject to varying degrees of imprecision which must be recognized in setting realistic limits on the range of ferrite content specified.

Combining values from the two systems may result in nonconformance with the practice. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Similar information is available in Table X1. Methods are described for estimating ferrite content by chemical, magnetic, and metallographic means.

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.

ASTM , Ferrite content (CF8M) – Metal and Metallurgy engineering – Eng-Tips

Estimation of Ferrite Content 7. Measurements may be made either before or after performance of the tension test. The values stated in each system are not exact equivalents; sstm, each system must be used independently of the other. 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.

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NOTE 1—There may be a substantial decrease in the ferrite content of weld deposits after solution heat treatment in comparison with asrm as-deposited value. 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. 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.

It is asmt responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. This may be formed upon solidication from the molten metal delta ferrite or by transformation from austenite or sigma phase on cooling in the solid state alpha ferrite. The quantity of ferrite in the structure is fundamentally a function of the chemical composition of the alloy and its thermal history.

Therefore, the precision of the ferrite content estimated from chemical composition depends on the accuracy of the chemical analysis procedure. Sources of error include the following:.

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.