Sintered metal materials, excluding hardmetals - Determination of transverse rupture strength (ISO/FDIS 3325:2025)

Gives a method for the determination of the transverse rupture strength of sintered metals, excluding hardmetals. Particularly suitable for comparing the sintered strength of a batch of metal powder with that of a reference powder or with a reference strength.

Sintermetalle, ausgenommen Hartmetalle - Ermittlung der Biegebruchfestigkeit (ISO/FDIS 3325:2025)

Matériaux métalliques frittés à l’exclusion des métaux-durs - Détermination de la résistance à la rupture transversale (ISO/FDIS 3325:2025)

La présente Norme internationale prescrit une méthode pour la détermination de la résistance à la rupture transversale des matériaux métalliques frittés, à l'exclusion des métaux-durs. Cette méthode est particulièrement adaptée à la comparaison de la résistance à l'état fritté d'un lot de poudre métallique à celle d'une poudre ou à une valeur de résistance de référence. La présente méthode est applicable aux matériaux métalliques frittés, à l'exclusion des métaux-durs, qu'ils aient ou non été soumis à un traitement thermique après frittage, ainsi qu'aux matériaux calibrés ou matricés après frittage. Elle est avant tout applicable aux matériaux de dureté uniforme dans la totalité de leur section et de ductilité négligeable, c'est-à-dire de ductilité correspondant à une déformation rémanente, résultant de l'essai et mesurée entre les deux supports, inférieure à 0,5 mm environ (voir note 1). Si l'essai est effectué sur des matériaux se trouvant dans des conditions autres que celles prescrites ci-dessus, les nouvelles conditions doivent être indiquées. NOTE 1 La déformation rémanente peut être mesurée avec une précision suffisante sur les deux fragments d'un barreau cassé ou d'un barreau fissuré par repérage de la surface inférieure. Il est également possible de mesurer, à l'aide d'un dispositif optique (microscope de mesure, comparateur optique, etc.) la courbure d'une droite tracée horizontalement sur le côté du barreau.

Sintrani kovinski materiali, razen trdin - Določanje prečne lomne trdnost (ISO/FDIS 3325:2025)

General Information

Status
Not Published
Publication Date
04-Mar-2026
ICS
77.040.10 - Mechanical testing of metals
 
77.160 - Powder metallurgy
Technical Committee
CEN/SS M11 - Powder metallurgy
Drafting Committee
CEN/SS M11 - Powder metallurgy
Current Stage
6055 - CEN Ratification completed (DOR) - Publishing
Start Date
05-Jan-2026
Completion Date
05-Jan-2026
Ref Project
kSIST FprEN ISO 3325:2025 - Sintered metal materials, excluding hardmetals - Determination of transverse rupture strength (ISO/FDIS 3325:2025)

Relations

Revises
EN ISO 3325:1999 - Sintered metal materials, excluding hardmetals - Determination of transverse rupture strength (ISO 3325:1996)
Effective Date
19-Jan-2023
Revises
EN ISO 3325:1999/A1:2002 - Sintered metal materials, excluding hardmetals - Determination of transverse rupture strength - Amendment 1: Precision statement (ISO 3325:1996/Amd. 1:2001)
Effective Date
19-Jan-2023

Overview

FprEN ISO 3325 (ISO/FDIS 3325) specifies a standardized method to determine the transverse rupture strength of sintered metal materials, excluding hardmetals. The method is intended primarily for comparative testing - for example, comparing a production batch to a reference powder or a reference strength - and is applicable to sintered parts whether or not they have received subsequent heat treatment, sizing or coining.

The test is a three-point bending (short-term static loading) procedure in which a test piece rests on two supports and is loaded at midspan until fracture or first crack formation.

Key Topics

  • Principle

    • A beam-shaped test piece is supported on two rollers and broken by a centrally applied load under static loading.

  • Apparatus

    • Load frame accurate to ±1 % with two support cylinders and one load-application cylinder.
    • Cylinder diameter: (3,2 ± 0,1) mm; materials: hardened steel (≥700 HV) or hardmetal.
    • Support centre distance: either (25,0 ± 0,2) mm or (25,4 ± 0,2) mm; measurement accuracy ±0,1 mm.

  • Test piece

    • Nominal dimensions produced from a die cavity of 30 mm × 12 mm and nominal thickness ~6 mm.
    • Thickness and dimensional tolerances and guidance for machined specimens are provided to avoid stress raisers or microstructural changes.

  • Procedure

    • Measure width and thickness at the midpoint to 0,01 mm.
    • Place specimen on supports with longitudinal axis perpendicular to roller axes and load at midspan.
    • Increase load steadily so time to fracture is not less than 10 s; record load at first crack.

  • Expression of results

    • The transverse rupture strength R_tr is calculated using the standard three-point bending formula:

      R_tr = (3 F L) / (2 b h^2)

      where F is fracture load (N), L the support span (mm), b the width (mm) and h the thickness (mm).

    • Report the arithmetic mean of determinations as specified in the standard.

  • Precision

    • The standard includes repeatability and reproducibility guidance (r and R) for common powder-metallurgy materials to support interpretation of inter- and intra-laboratory variation.

Applications

  • Quality control and acceptance testing of sintered components
  • Batch-to-reference comparison for powder qualification
  • Process control (typical use in powder metallurgy manufacturing)
  • Verification of material integrity after heat treatment, sizing or coining

Practical benefits: a repeatable, internationally harmonized test for assessing brittle or low-ductility sintered steels and alloys, enabling consistent comparison across production lots and laboratories.

Related Standards

  • The document references ISO/DIS 3325 (draft) and aligns with CEN processing as FprEN ISO 3325. Test reports should reference the standard and include specimen identification, support distance, test results and any deviations or incidents recorded during testing.

For implementation, laboratories should consult the full standard text for complete tolerances, reporting rules and precision tables before adoption.

Frequently Asked Questions

FprEN ISO 3325 is a draft published by the European Committee for Standardization (CEN). Its full title is "Sintered metal materials, excluding hardmetals - Determination of transverse rupture strength (ISO/FDIS 3325:2025)". This standard covers: Gives a method for the determination of the transverse rupture strength of sintered metals, excluding hardmetals. Particularly suitable for comparing the sintered strength of a batch of metal powder with that of a reference powder or with a reference strength.

Gives a method for the determination of the transverse rupture strength of sintered metals, excluding hardmetals. Particularly suitable for comparing the sintered strength of a batch of metal powder with that of a reference powder or with a reference strength.

FprEN ISO 3325 is classified under the following ICS (International Classification for Standards) categories: 77.040.10 - Mechanical testing of metals; 77.160 - Powder metallurgy. The ICS classification helps identify the subject area and facilitates finding related standards.

FprEN ISO 3325 has the following relationships with other standards: It is inter standard links to EN ISO 3325:1999, EN ISO 3325:1999/A1:2002. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

You can purchase FprEN ISO 3325 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.

Standards Content (Sample)


SLOVENSKI STANDARD
oSIST prEN ISO 3325:2024
01-september-2024
Sintrani kovinski materiali, razen trdin - Določanje prečne lomne trdnost (ISO/DIS
3325:2024)
Sintered metal materials, excluding hardmetals - Determination of transverse rupture
strength (ISO/DIS 3325:2024)
Sintermetalle, ausgenommen Hartmetalle - Ermittlung der Biegebruchfestigkeit (ISO/DIS
3325:2024)
Matériaux métalliques frittés à l'exclusion des métaux-durs - Détermination de la
résistance à la rupture transversale (ISO/DIS 3325:2024)
Ta slovenski standard je istoveten z: prEN ISO 3325
ICS:
77.040.10 Mehansko preskušanje kovin Mechanical testing of metals
77.160 Metalurgija prahov Powder metallurgy
oSIST prEN ISO 3325:2024 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 3325:2024
oSIST prEN ISO 3325:2024
DRAFT
International
Standard
ISO/DIS 3325
ISO/TC 119/SC 3
Sintered metal materials, excluding
Secretariat: DIN
hardmetals — Determination of
Voting begins on:
transverse rupture strength
2024-07-08
Matériaux métalliques frittés à l'exclusion des métaux-durs —
Voting terminates on:
Détermination de la résistance à la rupture transversale
2024-09-30
ICS: 77.160; 77.040.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
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 SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 3325:2024(en)
oSIST prEN ISO 3325:2024
DRAFT
ISO/DIS 3325:2024(en)
International
Standard
ISO/DIS 3325
ISO/TC 119/SC 3
Sintered metal materials, excluding
Secretariat: DIN
hardmetals — Determination of
Voting begins on:
transverse rupture strength
Matériaux métalliques frittés à l'exclusion des métaux-durs —
Voting terminates on:
Détermination de la résistance à la rupture transversale
ICS: 77.160; 77.040.10
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2024
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: +41 22 749 01 11
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 3325:2024(en)
ii
oSIST prEN ISO 3325:2024
ISO/DIS 3325:2024(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Test piece . 2
7 Procedure . 3
8 Expression of results . 3
9 Precision . 3
10 Test report . 4

iii
oSIST prEN ISO 3325:2024
ISO/DIS 3325:2024(en)
Foreword
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