EN ISO 3995:2023

SLOVENSKI STANDARD
01-september-2023
Kovinski praški - Določanje zelene trdnosti s prečnim prelomom pravokotnih
kompaktov (ISO 3995:2023)
Metallic powders - Determination of green strength by transverse rupture of rectangular
compacts (ISO 3995:2023)
Metallpulver - Bestimmung der Presskörperfestigkeit von Probekörpern mit rechteckigem
Querschnitt unter Biegebeanspruchung (ISO 3995:2023)
Poudres métalliques - Détermination de la résistance à la rupture transversale de
comprimés rectangulaires à cru (ISO 3995:2023)
Ta slovenski standard je istoveten z: EN ISO 3995:2023
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
77.160 Metalurgija prahov Powder metallurgy
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3995
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2023
EUROPÄISCHE NORM
ICS 77.040.10; 77.160 Supersedes EN 23995:1993
English Version
Metallic powders - Determination of green strength by
transverse rupture of rectangular compacts (ISO
3995:2023)
Poudres métalliques - Détermination de la résistance à Metallpulver - Bestimmung der Presskörperfestigkeit
la rupture transversale de comprimés rectangulaires à von Probekörpern mit rechteckigem Querschnitt unter
cru (ISO 3995:2023) Biegebeanspruchung (ISO 3995:2023)
This European Standard was approved by CEN on 3 June 2023.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3995:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3995:2023) has been prepared by Technical Committee ISO/TC 119 "Powder
metallurgy" in collaboration with CCMC.
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 December 2023, and conflicting national standards
shall be withdrawn at the latest by December 2023.
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 23995:1993.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 3995:2023 has been approved by CEN as EN ISO 3995:2023 without any modification.

INTERNATIONAL ISO
STANDARD 3995
Third edition
2023-06
Metallic powders — Determination of
green strength by transverse rupture
of rectangular compacts
Poudres métalliques — Détermination de la résistance à la rupture
transversale de comprimés rectangulaires à cru
Reference number
ISO 3995:2023(E)
ISO 3995:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 3995:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Sampling . 4
7 Procedure .4
7.1 Cleaning of the die and punches. 4
7.2 Powder testing conditions. 4
7.3 Lubrication . 5
7.3.1 General . 5
7.3.2 Die wall lubrication . 5
7.3.3 Lubrication of powder . 5
7.4 Compacting and ejection . 5
7.5 Compacting pressure . 6
7.6 Determination of density . 7
7.7 Determination of breaking force . 7
7.7.1 General . 7
7.7.2 Method 1 — Using a compression testing machine . 7
7.7.3 Method 2 — Using a loading beam device (see Figure 3) . 7
8 Expression of results . 7
9 Test report . 8
iii
ISO 3995:2023(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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of 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
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), in collaboration
with the European Committee for Standardization (CEN) Technical Committee CEN/SS M11, Powder
metallurgy, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna
Agreement).
This third edition cancels and replaces the second edition (ISO 3995:1985), which has been technically
revised.
The main changes are as follows:
— allowing automated compacting sequence in 7.4;
— adding second compacting pressure option and tighter tolerance in 7.5;
— mandatory reporting of lubrication technique and lubrication details in Clause 9;
— replacing stearic acid by synthetic wax;
— removing the use of solvent.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 3995:2023(E)
Metallic powders — Determination of green strength by
transverse rupture of rectangular compacts
1 Scope
This document specifies a method for the determination of green strength by measuring the transverse
rupture strength of compacts of rectangular cross-section.
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 terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Principle
Subjection of a compa
...