EN ISO 3927:2017

SLOVENSKI STANDARD
01-november-2017
1DGRPHãþD
SIST EN ISO 3927:2012
Kovinski praški razen praškov za trdine - Ugotavljanje stisljivosti z enoosno
kompresijo (ISO 3927:2017)
Metallic powders, excluding powders for hardmetals - Determination of compressibility in
uniaxial compression (ISO 3927:2017)
Metallpulver, mit Ausnahme von Hartmetallpulvern - Bestimmung der Verdichtbarkeit bei
einachsigem Pressen (ISO 3927:2017)
Poudres métalliques, à l'exclusion des poudres pour métaux-durs - Détermination de la
compressibilité sous compression uniaxiale (ISO 3927:2017)
Ta slovenski standard je istoveten z: EN ISO 3927:2017
ICS:
77.160 Metalurgija prahov Powder metallurgy
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3927
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2017
EUROPÄISCHE NORM
ICS 77.160 Supersedes EN ISO 3927:2011
English Version
Metallic powders, excluding powders for hardmetals -
Determination of compressibility in uniaxial compression
(ISO 3927:2017)
Poudres métalliques, à l'exclusion des poudres pour Metallpulver, mit Ausnahme von Hartmetallpulvern -
métaux-durs - Détermination de la compressibilité Bestimmung der Verdichtbarkeit bei einachsigem
sous compression uniaxiale (ISO 3927:2017) Pressen (ISO 3927:2017)
This European Standard was approved by CEN on 26 September 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3927:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 3927:2017) has been prepared by Technical Committee ISO/TC 119 “Powder
metallurgy”.
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 March 2018, and conflicting national standards shall
be withdrawn at the latest by March 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 3927:2011.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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 3927:2017 has been approved by CEN as EN ISO 3927:2017 without any modification.

INTERNATIONAL ISO
STANDARD 3927
Fifth edition
2017-09
Metallic powders, excluding powders
for hardmetals — Determination
of compressibility in uniaxial
compression
Poudres métalliques, à l'exclusion des poudres pour métaux-durs —
Détermination de la compressibilité sous compression uniaxiale
Reference number
ISO 3927:2017(E)
©
ISO 2017
ISO 3927:2017(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
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
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Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved

ISO 3927:2017(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols . 1
5 Principle . 1
6 Apparatus . 2
7 Sampling . 5
8 Procedure. 5
8.1 Cleaning of the die and punches . 5
8.2 Powder testing conditions . 5
8.3 Lubrication . 6
8.3.1 General. 6
8.3.2 Die wall lubrication . 6
8.3.3 Lubrication of powder . 6
8.4 Compacting and ejection . 6
8.5 Compacting pressures . 6
9 Expression of results . 8
10 Precision . 8
11 Test report . 8
Bibliography . 9
ISO 3927:2017(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www.iso.org/iso/foreword.html
This document was prepared by Technical Committee ISO/TC 119, Powder metallurgy, Subcommittee
SC 2, Sampling and testing methods for powders (including powders for hardmetals).
This fifth edition cancels and replaces the fourth edition (ISO 3927:2011), of which it constitutes a
minor revision to adjust punch tolerances in Figure 2 and clarify the use of scale and micrometer.
iv © ISO 2017 – All rights reserved

INTERNATIONAL STANDARD ISO 3927:2017(E)
Metallic powders, excluding powders for hardmetals —
Determination of compressibility in uniaxial compression
1 Scope
This document specifies methods for measuring the extent to which a metallic powder is compacted
when subjected to uniaxial compressive loading in a confining die under specified conditions.
The method is not applicable to powders for hardmetals.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Symbols
For the purposes of this document, the symbols given in Table 1 apply.
Table 1 — Symbols
Symbol Designation Unit
a 3
ρ Compressibility g/cm
p
m Mass of the compact g
V Volume of the compact cm
a 2
If the compressibility is measured at one pressure only, e.g. 400 N/mm , the symbol becomes
ρ .
p(400)
5 Principle
Uniaxial compaction of a powder in a confining die by double-action pressing. Samples of the powder
may be pressed either at a single specified pressure or at a series of specified pressures. After ejection
from the die, the density of the compacts is determined.
The density obtained in the former case represents the compressibility of the powder at the specified
pressure. The densities obtained in the latter case can be utilized for drawing the compressibility curve
of the powder, i.e. a plot of the density as a function of the compacting pressure.
ISO 3927:2017(E)
6 Apparatus
6.1 Die, preferably of cemented carbide, or alternatively of tool steel, and two punche
...