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BSI BS EN ISO 643:2024

Steels. Micrographic determination of the apparent grain size
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BSI BS EN ISO 643:2024

Steels. Micrographic determination of the apparent grain size

PUBLISH DATE 2024
PAGES 54
BSI BS EN ISO 643:2024

This document specifies micrographic methods 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.

SDO BSI: British Standards Institution
Document Number ISO 643
Publication Date Sept. 6, 2024
Language en - English
Page Count 54
Revision Level
Supercedes
Committee ISE/101/7
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