EN ISO 945-1:2018

SLOVENSKI STANDARD
01-april-2018
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SIST EN ISO 945-1:2009
SIST EN ISO 945-1:2009/AC:2010
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Microstructure of cast irons - Part 1: Graphite classification by visual analysis (ISO 945-
1:2017)
Mikrostruktur von Gusseisen - Teil 1: Graphitklassifizierung durch visuelle Auswertung
(ISO 945-1:2017)
Microstructure des fontes - Partie 1: Classification du graphite par analyse visuelle (ISO
945-1:2017)
Ta slovenski standard je istoveten z: EN ISO 945-1:2018
ICS:
77.080.10 Železo Irons
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 945-1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2018
EUROPÄISCHE NORM
ICS 77.080.10 Supersedes EN ISO 945-1:2008
English Version
Microstructure of cast irons - Part 1: Graphite
classification by visual analysis (ISO 945-1:2017)
Microstructure des fontes - Partie 1: Classification du Mikrostruktur von Gusseisen - Teil 1:
graphite par analyse visuelle (ISO 945-1:2017) Graphitklassifizierung durch visuelle Auswertung (ISO
945-1:2017)
This European Standard was approved by CEN on 6 December 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 945-1:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 945-1:2018) has been prepared by Technical Committee ISO/TC 25 “Cast irons
and pig irons” in collaboration with Technical Committee CEN/TC 190 “Foundry technology” the
secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2018, and conflicting national standards shall
be withdrawn at the latest by August 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 945-1:2008.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 945-1:2017 has been approved by CEN as EN ISO 945-1:2018 without any modification.

INTERNATIONAL ISO
STANDARD 945-1
Second edition
2017-12
Microstructure of cast irons —
Part 1:
Graphite classification by visual
analysis
Microstructure des fontes —
Partie 1: Classification du graphite par analyse visuelle
Reference number
ISO 945-1:2017(E)
©
ISO 2017
ISO 945-1:2017(E)
© ISO 2017, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
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the requester.
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copyright@iso.org
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ii © ISO 2017 – All rights reserved

ISO 945-1:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 General . 1
4.1 Designation system for classifying graphite in cast irons . 1
4.2 Form . 2
4.3 Distribution . 3
4.4 Size . 4
4.5 Visual classification of graphite .23
5 Sampling and sample preparation .23
5.1 Samples taken from a casting .23
5.2 Sample preparation .23
6 Procedure for graphite classification .23
6.1 Procedure for visual classification of graphite .23
6.2 Evaluation of the analysis results .24
7 Reference images .24
7.1 General .24
7.2 Reference images for graphite form .24
7.3 Reference images for the distribution of graphite (form I) .24
7.4 Reference images for graphite size .24
8 Designation of graphite by form, distribution and size .25
8.1 Designation system .25
8.2 Designation of different graphite sizes within a casting .25
8.3 Designation of mixed graphite forms, distributions and sizes .26
8.4 Designation of unclassified graphite forms .26
8.5 Nodule count .26
9 Report .27
Annex A (informative) Typical graphite forms in cast-iron materials — Examples
of photomicrographs .28
Annex B (informative) Distribution of flake (lamellar) graphite (form I) — Examples
of photomicrographs .29
Annex C (informative) Common terminology and main occurrences concerning graphite in
cast irons .30
Bibliography .32
ISO 945-1:2017(E)
Foreword
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URL: www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 25, Cast irons and pig irons.
This second edition cancels and replaces the first edition (ISO 945-1:2008), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 945-1:2008/Cor.1:2010. Figures 3
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