ISO 643:2012

Steels — Micrographic determination of the apparent grain size

Publication date: 10 dhj 2012

95.99 Withdrawal of Standard 12 dhj 2019

General information

Current stage: 95.99 Effective date: 12 dhj 2019

Originator: ISO

Owner: ISO/TC 17/SC 7

Type: International Standard

ICS: 77.040.99

Gjuha: anglisht frëngjisht

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Statusi: Shfuqizuar

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Scope

ISO 643:2012 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WITHDRAWN
ISO 643:2003

NOW

WITHDRAWN
ISO 643:2012
95.99 Withdrawal of Standard
12 dhj 2019

REVISED BY

ABANDON
ISO/FDIS 643

WITHDRAWN
ISO 643:2019