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ASTM E975-00

Historical Revision

Standard Practice for X-Ray Determination of Retained Austenite in Steel with Near Random Crystallographic Orientation (Withdrawn 2022)

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1.1 This practice covers the determination of retained austenite phase in steel using integrated intensities (area under peak above background) of X-ray diffraction peaks using chromium K[alpha] or molybdenum K[alpha] X-radiation.

1.2 The method applies to carbon and alloy steels with near random crystallographic orientations of both ferrite and austenite phases.

1.3 This practice is valid for retained austenite contents from 1% by volume and above.

1.4 If possible, X-ray diffraction peak interference from other crystalline phases such as carbides should be eliminated from the ferrite and austenite peak intensities.

1.5 Substantial alloy contents in steel cause some change in peak intensities which have not been considered in this method. Application of this method to steels with total alloy contents exceeding 15 weight% should be done with care. If necessary, the users can calculate the theoretical correction factors to account for changes in volume of the unit cells for austenite and ferrite resulting from variations in chemical composition.

1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.


SDO ASTM: ASTM International
Document Number E975
Publication Date July 10, 2000
Language en - English
Page Count 6
Revision Level 00
Supercedes
Committee E04.11
Publish Date Document Id Type View
Nov. 1, 2022 E0975-22 Revision
Feb. 15, 2013 E0975-13 Revision
Nov. 1, 2003 E0975-03 Revision
July 10, 2000 E0975-00 Revision
June 1, 2008 E0975-03R08 Reaffirmation