NA 062

DIN Standards Committee Materials Testing

Standards [Withdrawn]

DIN EN ISO 643
Steels - Micrographic determination of the apparent grain size (ISO 643:2012); German version EN ISO 643:2012

Title (German)

Stahl - Mikrophotographische Bestimmung der erkennbaren Korngröße (ISO 643:2012); Deutsche Fassung EN ISO 643:2012

Overview

This document (EN ISO 643:2012) has been prepared by Technical Committee ISO/TC 17 "Steel" in collaboration with Technical Committee ECISS/TC 101 "Test methods for steel (other than chemical analysis)", the secretariat of which is held by AFNOR. The responsible German committee is Joint Working Committee NA 062-01-31 GA "Gemeinschaftsarbeitsausschuss NMP/FES: Metallographische Prüfverfahren" ("Joint working committee NMP/FES: Metallographical test methods") of the Materials Testing Standards Committee (NMP) at DIN. This International Standard 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.

Document: references other documents

Document: referenced in other documents

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 - Methods of testing (other than mechanical tests and chemical analysis)  

Edition 2013-05
Original language German
Translation English
Price from 112.30 €
Table of contents

Contact

Daniel Müller

Am DIN-Platz, Burggrafenstr. 6
10787 Berlin

Tel.: +49 30 2601-2867
Fax: +49 30 2601-42867

Send message to contact