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SRPS EN ISO 643:2020

Steels - Micrographic determination of the apparent grain size (ISO 643:2019, Corrected version 2023-11)

Sep 30, 2020
Jan 31, 2022
95.99   Withdrawal of Standard   Sep 30, 2024

General information

95.99     Sep 30, 2024

ISS

C164

European Norm

77.040.99  

English   Serbian  

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Scope

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.

Life cycle

PREVIOUSLY

WITHDRAWN
SRPS EN ISO 643:2014

NOW

WITHDRAWN
SRPS EN ISO 643:2020
95.99 Withdrawal of Standard
Sep 30, 2024

REVISED BY

PUBLISHED
SRPS EN ISO 643:2024

Related project

Adopted from EN ISO 643:2020

Adopted from ISO 643:2019