Steels - Micrographic determination of the apparent grain size (ISO 643:2024); German version EN ISO 643:2024
Abstract
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.
Begin
2022-02-27
WI
EC101194
Planned document number
DIN EN ISO 643
Project number
06236291
Responsible national committee
NA 062-01-31 GA - Joint working committee NMP/FES: Metallographical test methods
Responsible european committee
CEN/TC 459/SC 1 - Test methods for steel (other than chemical analysis)
Responsible international committee
ISO/TC 17/SC 7/WG 2 - Micrographic determination of the apparent grain size
draft standard
Steels - Micrographic determination of the apparent grain size (ISO/DIS 643:2023); German and English version prEN ISO 643:2023
2023-08
Order from DIN Media
