ISO 643:2003

Steels — Micrographic determination of the apparent grain size

Publication date: 6 shk 2003

95.99 Withdrawal of Standard 10 dhj 2012

General information

Current stage: 95.99 Effective date: 10 dhj 2012

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 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WITHDRAWN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 643:1983

NOW

WITHDRAWN
ISO 643:2003
95.99 Withdrawal of Standard
10 dhj 2012

REVISED BY

WITHDRAWN
ISO 643:2012