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ISO 643:2012

Steels — Micrographic determination of the apparent grain size

Dec 10, 2012
95.99   Withdrawal of Standard   Dec 12, 2019

General information

95.99     Dec 12, 2019

ISO

ISO/TC 17/SC 7

International Standard

77.040.99  

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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WITHDRAWN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WITHDRAWN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
Dec 12, 2019

REVISED BY

ABANDON
ISO/FDIS 643

WITHDRAWN
ISO 643:2019

National adoptions

Steels - Micrographic determination of the apparent grain size (ISO 643:2012)

95.99   Withdrawal of Standard

C164 more

Steels - Micrographic determination of the apparent grain size (ISO 643:2012)

95.99   Withdrawal of Standard

C164 more