ISO 643:2019

Retirada (Edición 4, 2019)

Nueva versión disponible: ISO 643:2024

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.

Informaciones generales

Estado
: Retirada

Fecha de publicación
: 2019-12

Versión corregida (fr)
: 2023-11

Etapa
: Retirada de la Norma Internacional [95.99]
Edición
: 4

Número de páginas
: 21
Comité Técnico :
ISO/TC 17/SC 7

ICS :
77.040.99
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