ISO 3995:2023

Metallic powders — Determination of green strength by transverse rupture of rectangular compacts

This document specifies a method for the determination of green strength by measuring the transverse rupture strength of compacts of rectangular cross-section.

Poudres métalliques — Détermination de la résistance à la rupture transversale de comprimés rectangulaires à cru

Le présent document spécifie une méthode de détermination de la résistance à la rupture transversale par mesure de la résistance à la flexion de comprimés de section rectangulaire à cru.

General Information

• Status: Published
• Publication Date: 08-Jun-2023
• ICS: 77.040.10 - Mechanical testing of metals
• ICS: 77.160 - Powder metallurgy
• Technical Committee: ISO/TC 119/SC 2 - Sampling and testing methods for powders (including powders for hardmetals)
• Drafting Committee: ISO/TC 119/SC 2 - Sampling and testing methods for powders (including powders for hardmetals)
• Current Stage: 6060 - International Standard published
• Start Date: 09-Jun-2023
• Due Date: 06-Dec-2023
• Completion Date: 09-Jun-2023

Relations

• Revises: ISO 3995:1985 - Metallic powders — Determination of green strength by transverse rupture of rectangular compacts
• Effective Date: 06-Jun-2022

Standards Content (Sample)

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 2023

---------------------- Page: 1 ----------------------
ISO 3995:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© 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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
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 2023 – All rights reserved

---------------------- Page: 3 ----------------------
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
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
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 compact pressed from metallic powder to a uniformly increasing transverse force
under controlled conditions until fracture occurs. Determination of the tran
...

NORME ISO
INTERNATIONALE 3995
Troisième édition
2023-06
Poudres métalliques — Détermination
de la résistance à la rupture
transversale de comprimés
rectangulaires à cru
Metallic powders — Determination of green strength by transverse
rupture of rectangular compacts
Numéro de référence
ISO 3995:2023(F)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO 3995:2023(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2023
Tous droits réservés. Sauf prescription différente ou nécessité dans le contexte de sa mise en œuvre, aucune partie de cette
publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique,
y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut
être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.
ISO copyright office
Case postale 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Genève
Tél.: [phone]
E-mail: [e-mail]
Web: www.iso.org
Publié en Suisse
ii
  © ISO 2023 – Tous droits réservés

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ISO 3995:2023(F)
Sommaire Page
Avant-propos .iv
1 Domaine d’application . 1
2 Références normatives .1
3 Termes et définitions . 1
4 Principe. 1
5 Appareillage . 1
6 Échantillonnage .4
7 Mode opératoire . 4
7.1 Nettoyage de la matrice et des poinçons . 4
7.2 Conditions d'essai de la poudre . 4
7.3 Lubrification . 5
7.3.1 Généralités . 5
7.3.2 Lubrification des parois de la matrice . 5
7.3.3 Lubrification de la poudre . 5
7.4 Compression et éjection . 5
7.5 Pression de compression . 6
7.6 Détermination de la masse volumique . 7
7.7 Détermination de la force de rupture . 7
7.7.1 Généralités . 7
7.7.2 Méthode 1 — Utilisation d'une machine d’essai en compression . 7
7.7.3 Méthode 2 — Utilisation d'un dispositif à fléau pour le chargement (voir
Figure 3) . . 7
8 Expression des résultats . 7
9 Rapport d'essai . 8
iii
© ISO 2023 – Tous droits réservés

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ISO 3995:2023(F)
Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes
nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est
en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude
a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,
gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.
L'ISO collabore étroitement avec la Commission électrotechnique internationale (IEC) en ce qui
concerne la normalisation électrotechnique.
Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont
décrites dans les Directives ISO/IEC, Partie 1. Il convient, en particulier, de prendre note des différents
critères d'approbation requis pour les différents types de documents ISO. Le présent document a
été rédigé conformément aux règles de rédaction données dans les Directives ISO/IEC, Partie 2 (voir
www.iso.org/directives).
L’ISO attire l’attention sur le fait que la mise en application du présent document peut entraîner
l’utilisation d’un ou de plusieurs brevets. L’ISO ne prend pas position quant à la preuve, à la validité
et à l’applicabilité de tout droit de brevet revendiqué à cet égard. À la date de publication du présent
document, l’ISO n'avait pas reçu notification qu’un ou plusieurs brevets pouvaient être nécessaires à sa
mise en application. Toutefois, il y a lieu d’avertir les responsables de la mise en application du présent
document que des informations plus récentes sont susceptibles de figurer dans la base de données de
brevets, disponible à l'adresse www.iso.org/brevets. L’ISO ne saurait être tenue pour responsable de ne
pas avoir identifié tout ou partie de tels droits de propriété.
Les appellations commerciales éventuellement mentionnées dans le présent document sont données
pour information, par souci de commodité, à l’intention des utilisateurs et ne sauraient constituer un
engagement.
Pour une explication de la nature volontaire des normes, la signification des termes et expressions
spécifiques de l'ISO liés à l'évaluation de la conformité, ou pour toute information au sujet de l'adhésion
de l'ISO aux principes de l’Organisation mondiale du commerce (OMC) concernant les obstacles
techniques au commerce (OTC), voir www.iso.org/avant-propos.
Le présent document a été élaboré par le comité technique ISO/TC 119, Métallurgie des poudres, sous-
comité SC 2, Échantillonnage et méthodes d'essais des poudres (y compris les poudres pour métaux-durs),
en collaboration avec le comité technique CEN/SS M11, Métallurgie des poudres, du Comité européen de
normalisation (CEN) conformément à l’Accord de coopération technique entre l’ISO et le CEN (Accord de
Vienne).
Cette troisième édition annule et remplace la deuxième édition (ISO 3995:1985), qui a fait l'objet d'une
révision technique.
Les principales modifications sont les suivantes:
— autorisation d’une séquence de compression automatisée en 7.4;
— ajout d’une seconde pression de compression possible ainsi que d’une tolérance plus stricte en 7.5;
— obligation d’indiquer la technique de lubrification et les données détaillées relatives à celle-ci
à l’Article 9;
— remplacement de l’acide stéarique par de la cire synthétique;
— suppression de l’utilisation de solvant.
Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent
document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes
se trouve à l’adresse www.iso.org/fr/members.html.
iv
  © ISO 2023 – Tous droits réservés

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NORME INTERNATIONALE ISO 3995:2023(F)
Poudres métalliques — Détermination de la résistance à la
rupture transversale de comprimés rectangulaires à cru
1 Domaine d’application
Le présent document spécifie une méthode de détermination de la résistance à la rupture transversale
par mesure de la résistance à la flexion de comprimés de section rectangulaire à cru.
2 Références normatives
Le présent document ne contient aucune référence normative.
3 Termes et définitions
Le présent document ne contient pas de liste de termes et définitions.
L'ISO et l'IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en
normalisation, consultables aux adresses suivantes:
— ISO Online browsing platform: disponible à l'adresse https:// www .iso .org/ obp
— IEC Electropedia: disponible à l'adresse https:// www .electropedia .org/
4 Principe
Le principe consiste à soumettre un comprimé obtenu par compression d’une poudre métallique à une
charge transversale croissant de manière uniforme, dans des conditions contrôlées, jusqu'à la rupture.
La résistance à la rupture transversale ou, comme dénommée ici, la résistance à cru, est déterminée
comme étant la contrainte, calculée à partir de la formule conventionnelle de la flexion, nécessaire pour
rompre le comprimé assimilé à un simple barreau reposant sur deux appuis à ses extrémités et soumis
à une force appliquée en son milieu.
La résistance à cru est déterminée
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 3995
ISO/TC 119/SC 2
Metallic powders — Determination of
Secretariat: SIS
green strength by transverse rupture
Voting begins on:
2023-03-07 of rectangular compacts
Voting terminates on:
Poudres métalliques — Détermination de la résistance à la rupture
2023-05-02
transversale de comprimés rectangulaires à cru
ISO/CEN PARALLEL PROCESSING
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 3995:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 1 ----------------------
ISO/FDIS 3995:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 3995
ISO/TC 119/SC 2
Metallic powders — Determination of
Secretariat: SIS
green strength by transverse rupture
Voting begins on:
of rectangular compacts
Voting terminates on:
Poudres métalliques — Détermination de la résistance à la rupture
transversale de comprimés rectangulaires à cru
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
ISO/CEN PARALLEL PROCESSING
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 3995:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 2 ----------------------
ISO/FDIS 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 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/FDIS 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 non­governmental, 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 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
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 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 st
...

ISO/FDIS 3995:2023(E)
Secretariat: SIS
2023-01-2002-21
ISO TC 119/SC 2
Metallic powders — Determination of green strength by transverse rupture of rectangular
compacts
Poudres métalliques — Détermination de la résistance de comprimés rectangulaires à cru

---------------------- Page: 1 ----------------------
ISO/FDIS 3995:2023(E)
© ISO 20222023
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: [phone]
Email: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
Formatted: Font: 11 pt
Formatted: Space After: 12 pt, Line spacing: Exactly 11
pt
2 © ISO #### – All rights reserved
ii © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 3995:2023(E)
Contents
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
5.1 Die . 1
5.2 Press . 2
5.3 Balance . 2
5.4 Micrometer or other measuring device . 2
5.5 Fixture for testing . 3
5.6 Loading device . 3
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
7.4 Compacting and ejection . 5
7.5 Compacting pressure . 7
7.6 Determination of density . 7
7.7 Determination of breaking force . 7
8 Expression of results . 7
9 Test report . 8
Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
Formatted: Font: 11 pt
Formatted: Space After: 12 pt, Line spacing: Exactly 11
pt
© ISO #### – All rights reserved 3
© ISO 2023 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/FDIS 3995:2023(E)
4 Principle . 1
5 Apparatus . 1
5.1 Die . 1
5.2 Press. 2
5.3 Balance . 2
5.4 Micrometer or other measuring device . 2
5.5 Fixture for testing . 3
5.6 Loading device . 3
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
7.4 Compacting and ejection . 5
7.5 Compacting pressure . 7
7.6 Determination of density . 7
7.7 Determination of breaking force . 7
8 Expression of results . 7
9 Test report . 8
Formatted: Font: 11 pt
Formatted: Space After: 12 pt, Line spacing: Exactly 11
pt
4 © ISO #### – All rights reserved
iv © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 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 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/directiveswww.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/patentswww.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 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.htmlwww.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;
Formatted: Font: 11 pt
— removing the use of solvent;
Formatted: Space After: 12 pt, Line spacing: Exactly 11
pt
© ISO #### – All rights reserved 5
© ISO 2023 – All rights reserved v

---------------------- Page: 5 ----------------------
ISO/FDIS 3995:2023(E)
— clause 2 “Normative references” and clause 3 “Terms and Definitions” have been added.
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.htmlwww.iso.org/members.html.
Formatted: Font: 11 pt
Formatted: Space After: 12 pt, Line spacing: Exactly 11
pt
6 © ISO #### – All rights reserved
vi © ISO 2023 – All rights reserved

---------------------- Page: 6 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 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 c
...