SIST EN ISO 3327:2009

Hardmetals - Determination of transverse rupture strength (ISO 3327:2009)

ISO 3327:2009 specifies a method for the determination of the transverse rupture strength of hardmetals.
This method is applicable to hardmetals of negligible ductility. If it is used for hardmetals showing significant plastic deformation before breaking, incorrect results may be obtained. In such cases, the method may be used for comparison purposes only.

Hartmetalle - Bestimmung der Biegebruchfestigkeit (ISO 3327:2009)

Diese Internationale Norm legt ein Verfahren zur Bestimmung der Biegebruchfestigkeit von Hartmetallen fest.
Das Verfahren ist bei Hartmetallen von geringfügiger Verformbarkeit anwendbar. Wird es bei Hartmetallen verwendet, die vor dem Bruch größere plastische Verformungen aufweisen, dann kann es zu fehlerhaften Egebnissen kommen. In solchen Fällen kann das Verfahren nur zu Vergleichszwecken angewendet werden.

Métaux-durs - Détermination de la résistance à la flexion (ISO 3327:2009)

L'ISO 3327:2009 spécifie une méthode de détermination de la résistance à la flexion des métaux-durs.
Cette méthode est applicable aux métaux-durs dont la ductilité est négligeable. Si on l'applique à des métaux-durs présentant une déformation plastique appréciable avant rupture, elle peut conduire à des résultats erronés. Dans ce cas, la méthode peut être utilisée comme moyen de comparaison.

Trdine - Določevanje prečne lomne trdnosti (ISO 3327:2009)

General Information

• Status: Published
• Publication Date: 11-Jun-2009
• ICS: 77.040.10 - Mechanical testing of metals
• ICS: 77.160 - Powder metallurgy
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 21-May-2009
• Due Date: 26-Jul-2009
• Completion Date: 12-Jun-2009
• Ref Project: EN ISO 3327:2009 - Hardmetals - Determination of transverse rupture strength (ISO 3327:2009)

Relations

• Replaces: SIST EN 23327:2000 - Hardmetals - Determination of transverse rupture strength (ISO 3327:1982)
• Effective Date: 01-Jul-2009

Overview

SIST EN ISO 3327:2009 is an international standard developed by ISO/TC 119 and adopted by CEN that specifies the method for determining the transverse rupture strength of hardmetals. This testing standard is essential for assessing the mechanical strength of hardmetals, materials known for their hardness and brittleness, making them widely used in cutting tools, wear-resistant parts, and industrial applications.

The standard applies primarily to hardmetals with negligible ductility, ensuring accuracy in measurements. For hardmetals exhibiting significant plastic deformation before fracture, this method may yield inaccurate results and should be applied only for comparative purposes.

Key Topics

• Scope and Applicability
  This method targets hardmetals that break without noticeable plastic deformation. It defines how to measure transverse rupture strength under short-term static loading conditions.

• Test Specimens
  Specifies three types of test pieces:

  • Type A & B: Rectangular cross-section test pieces, with detailed dimensions and surface finish requirements.
  • Type C: Cylindrical test pieces, suitable for specific testing scenarios.

• Surface Preparation
  Test pieces must be ground or prepared with a specific surface roughness (maximum Rₐ of 0.4 µm) and chamfered edges to ensure consistent and reliable results.

• Test Setup and Apparatus
  The standard requires a force application device capable of controlled load increments with an accuracy of at least 1%. Three precision tungsten carbide rollers (or a ball for flat specimens) are used to support and load the test pieces. Exact distances between supports and precise alignment criteria ensure repeatability and reliability.

• Test Procedure
  The load is applied gradually at the midpoint of the specimen until rupture occurs, with defined maximum loading rates to avoid dynamic effects on results.

• Calculation of Transverse Rupture Strength
  Formulas are provided for both rectangular and cylindrical specimens to compute rupture strength in N/mm², including correction factors for chamfer dimensions.

• Reporting Requirements
  Test reports must clearly reference the standard, sample identification, specimen type, surface preparation, load application method, and results. Subscripts indicate specimen type and surface condition (sintered or ground).

Applications

• Material Quality Control
  Crucial for manufacturers of hardmetals to ensure their products meet mechanical strength requirements before distribution.

• Research and Development
  Enables comparative analysis of hardmetal formulations and processing techniques to enhance durability and performance.

• Component Design Verification
  Engineers use transverse rupture strength data to validate component design safety and expected lifespan in demanding industrial environments like tooling and wear parts.

• Failure Analysis
  Assists in identifying causes of premature fracture in hardmetal components through standardized strength measurement.

Related Standards

• EN 23327:1993 – This was the predecessor to SIST EN ISO 3327:2009, now superseded by the updated method.
• Other ISO standards under ISO/TC 119 cover powder metallurgy sampling and testing to complement mechanical property measurement of hardmetals.
• Standards addressing surface preparation and hardness testing for hardmetals provide comprehensive quality assessment frameworks.

---

By adhering to the SIST EN ISO 3327:2009 standard, professionals working with hardmetals can reliably measure transverse rupture strength, a critical factor influencing the performance and safety of precision tools and wear-resistant parts. This test method facilitates consistent, comparable data across laboratories and industries, enhancing material selection and quality assurance processes.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2009
1DGRPHãþD
SIST EN 23327:2000
7UGLQH'RORþHYDQMHSUHþQHORPQHWUGQRVWL,62
Hardmetals - Determination of transverse rupture strength (ISO 3327:2009)
Hartmetalle - Bestimmung der Biegebruchfestigkeit (ISO 3327:2009)
Métaux-durs - Détermination de la résistance à la flexion (ISO 3327:2009)
Ta slovenski standard je istoveten z: EN ISO 3327:2009
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.

EUROPEAN STANDARD
EN ISO 3327
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2009
ICS 77.160; 77.040.10 Supersedes EN 23327:1993
English Version
Hardmetals - Determination of transverse rupture strength (ISO
3327:2009)
Métaux-durs - Détermination de la résistance à la flexion Hartmetalle - Bestimmung der Biegebruchfestigkeit (ISO
(ISO 3327:2009) 3327:2009)
This European Standard was approved by CEN on 16 April 2009.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3327:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 3327:2009) has been prepared by Technical Committee ISO/TC 119 "Powder
metallurgy" in collaboration withTechnical Committee CEN/SS M11 “Powder metallurgy” the secretariat of
which is held by CMC.
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 November 2009, and conflicting national standards shall be withdrawn
at the latest by November 2009.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 23327:1993.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 3327:2009 has been approved by CEN as a EN ISO 3327:2009 without any modification.

INTERNATIONAL ISO
STANDARD 3327
Third edition
2009-05-15
Hardmetals — Determination
of transverse rupture strength
Métaux-durs — Détermination de la résistance à la flexion

Reference number
ISO 3327:2009(E)
©
ISO 2009
ISO 3327:2009(E)
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ii © ISO 2009 – All rights reserved

ISO 3327:2009(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 3327 was prepared by Technical Committee ISO/TC 119, Powder metallurgy, Subcommittee SC 4,
Sampling and testing methods for hardmetals.
This third edition cancels and replaces the second edition (ISO 3327:1982), which has been technically
revised.
INTERNATIONAL STANDARD ISO 3327:2009(E)

Hardmetals — Determination of transverse rupture strength
1 Scope
This International Standard specifies a method for the determination of the transverse rupture strength of
hardmetals.
This method is applicable to hardmetals of negligible ducti
...