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EVS-EN ISO 643:2012

Steels - Micrographic determination of the apparent grain size (ISO 643:2012)

General information
Withdrawn from 03.02.2020
Base Documents
ISO 643:2012; EN ISO 643:2012
Directives or regulations
None
Standard history
Status
Date
Type
Name
03.02.2020
Main
04.01.2013
Main
Main
EVS-EN ISO 643:2007
This International Standard specifies a micrographic method of determining apparent ferritic or austenitic grain size in steels. It describes the methods of revealing grain boundaries and of estimating the mean grain size of specimens with unimodal size distribution. Although grains are three-dimensional in shape, the metallographic sectioning plane can cut through a grain at any point from a grain corner, to the maximum diameter of the grain, thus producing a range of apparent grain sizes on the two-dimensional plane, even in a sample with a perfectly consistent grain size.
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