BS EN ISO 643:2003 - Steels. Micrographic determination of the apparent grain size – BSI British Standards

BS EN ISO 643:2003

Steels. Micrographic determination of the apparent grain size

Status : Revised, Superseded, Withdrawn   Published : March 2003 Replaced By : BS EN ISO 643:2012

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BS EN ISO 643 Steels. Micrographic determination of the apparent grain size

BS EN ISO 643 is the international Standard that 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.

History and related standards

This international Standard supersedes BS 4490:1989 which is withdrawn.

BS EN ISO 643  includes the following cross references:

ISO 3785, ISO 14250, ASTM E112.




Standard NumberBS EN ISO 643:2003
TitleSteels. Micrographic determination of the apparent grain size
StatusRevised, Superseded, Withdrawn
Publication Date10 March 2003
Withdrawn Date31 January 2013
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Replaced ByBS EN ISO 643:2012
ReplacesBS 4490:1989
International RelationshipsEN ISO 643:2003,ISO 643:2003
Draft Superseded By01/706923 DC
DescriptorsFerrous metals, Steels, Ferritic steels, Austenitic steels, Crystal microstructure, Crystal examination, Microscopic analysis, Metallography, Grain size
ICS77.040.99
Title in FrenchAciers. Determination micrographique de la grosseur de grain apparente
Title in GermanStahl. Mikrophotographische Bestimmung der scheinbaren Korngroesse
CommitteeISE/102
ISBN0 580 41396 9
PublisherBSI
FormatA4
DeliveryNo
Pages44
File Size3.338 MB
Price£214.00


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