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ASTM E768-99(2018)

Current Reaffirmation

Standard Guide for Preparing and Evaluating Specimens for Automatic Inclusion Assessment of Steel

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1.1 This guide2 covers two preparation methods for steel metallographic specimens that will be analyzed for nonmetallic inclusions with automatic image analysis (AIA) equipment. The two methods of preparation are offered as accepted methods used to retain nonmetallic inclusions in steel. This guide does not limit the user to these methods.

1.2 A procedure to test the suitability of the prepared specimen for AIA inclusion work, using differential interference contrast (DIC), is presented.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


4.1 Inclusion ratings done either manually using Test Methods E45 or automatically using Practice E1122 or E1245 are influenced by the quality of specimen preparation. This guide provides examples of proven specimen preparation methods that retain inclusions in polished steel specimens.

4.2 This guide provides a procedure to determine if the prepared specimens are of suitable quality for subsequent rating of inclusions. None of these methods should be construed as defining or establishing specific procedures or limits of acceptability for any steel grade.

SDO ASTM: ASTM International
Document Number E768
Publication Date May 1, 2018
Language en - English
Page Count 5
Revision Level 99(2018)
Supercedes
Committee E04.01
Publish Date Document Id Type View
Nov. 1, 2010 E0768-99R10E01 Revision
April 10, 1999 E0768-99 Revision
May 1, 2018 E0768-99R18 Reaffirmation
Nov. 1, 2010 E0768-99R10 Reaffirmation
May 1, 2005 E0768-99R05 Reaffirmation
Nov. 1, 2004 E0768-99R04 Reaffirmation