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Normas BSI – AENOR
BS EN ISO 643:2020

BS EN ISO 643:2020

Steels. Micrographic determination of the apparent grain size

Fecha:
2020-05-05 /Under Review
Comité:
ISE/101/7
Equivalencias internacionales:

EN ISO 643:2020

ISO 643:2019

Relación con otras normas BSI:

Reemplaza a: BS EN ISO 643:2012

Resumen:

This document 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.

Keywords:
Crystal microstructure, Grain size, Steels, Crystal examination, Ferritic steels, Austenitic steels, Microscopic analysis, Metallography, Ferrous metals
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