SIST EN ISO 14627:2026
(Main)Fine ceramics (advanced ceramics, advanced technical ceramics) - Test method for fracture resistance of silicon nitride materials for rolling bearing balls at room temperature by indentation fracture (IF) method (ISO 14627:2012)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Test method for fracture resistance of silicon nitride materials for rolling bearing balls at room temperature by indentation fracture (IF) method (ISO 14627:2012)
ISO 14627:2012 describes a test method that covers the determination of fracture resistance of silicon nitride bearing balls at room temperature by the indentation fracture (IF) method, as specified in ISO 26602.
ISO 14627:2012 is intended for use with monolithic silicon nitride ceramics for bearing balls. It does not include other ceramic materials.
ISO 14627:2012 is for material comparison and quality assurance.
Hochleistungskeramik - Prüfverfahren für die Bestimmung der Bruchzähigkeit mit Hilfe von Vickers-Härteeindrücken bei Raumtemperatur an Wälzlagerkugeln aus Siliziumnitrid (ISO 14627:2012)
Céramiques techniques - Méthode d'essai de résistance à la rupture des matériaux nitrure de silicium pour billes de roulement à billes à température ambiante par la méthode de rupture par indentation (ISO 14627:2012)
La présente Norme internationale décrit une méthode d’essai qui couvre la détermination de la résistance à la rupture de billes de roulement en nitrure de silicium à température ambiante par la méthode de rupture par indentation (IF), comme spécifié dans l’ISO 26602.
La présente Norme internationale est destinée à être utilisée pour les céramiques en nitrure de silicium monolithiques pour les billes de roulement. Elle n’inclut pas les autres matériaux céramiques.
La présente Norme internationale est destinée à la comparaison de matériaux et à l’assurance qualité.
La résistance à la rupture par indentation, KI, IFR telle que définie dans la présente Norme internationale ne doit pas être confondue avec la ténacité à la rupture déterminée au moyen d’autres méthodes d’essai, comme KIsc et KIpb.
NOTE KI, IFR est une estimation de la résistance d’un matériau à la fissuration introduite par un pénétrateur et présente des corrélations avec la résistance à l’usure et la performance de fatigue de contact de roulement ainsi qu’avec les processus d’usinage utilisés pour les matériaux de nitrure de silicium, puisque ces propriétés sont régies par la résistance à l’extension de fissures dans des surfaces endommagées localisées. Par contraste, la ténacité à la rupture, KIsc et KIpb sont des propriétés intrinsèques d’un matériau et concernent des évènements de rupture macroscopiques et catastrophiques présentant de longues fissures, plutôt que les phénomènes provoqués par une accumulation de dommages microscopiques successifs associés aux fissures courtes.
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Preskusna metoda za odpornost proti lomu silicijevih nitridnih materialov za kroglice kotalnih ležajev pri sobni temperaturi z metodo vtiska loma (IF) (ISO 14627:2012)
General Information
- Status
- Published
- Public Enquiry End Date
- 22-Oct-2025
- Publication Date
- 07-Dec-2025
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 04-Dec-2025
- Due Date
- 08-Feb-2026
- Completion Date
- 08-Dec-2025
Overview
EN ISO 14627:2025 (identical to ISO 14627:2012) specifies a standardized test method to determine the fracture resistance of monolithic silicon nitride materials for rolling bearing balls at room temperature using the indentation fracture (IF) method. The method is intended for material comparison and quality assurance of advanced/technical ceramics used in bearing applications, not for other ceramic families. It links to ISO 26602 requirements for silicon nitride bearing-ball materials.
Key topics and technical requirements
- Test principle: A Vickers diamond pyramid indenter is forced into a polished specimen surface and the indentation diagonal (2a) and associated crack lengths (2c) are measured to calculate indentation fracture resistance K_I,IF.
- Test conditions:
- Typical test load: 196.1 N with a 15 s dwell time. If acceptable indentations cannot be obtained, a lower load of 98.07 N may be used (test load must be reported).
- Room-temperature testing on monolithic silicon nitride bearing balls or sections from the same lot.
- Specimen preparation:
- Ground and polished surfaces; surface roughness Ra ≤ 0.1 µm (ISO 4287).
- Specimen thickness sufficient so crack lengths are unaffected (generally > 3 mm, or >5× crack length 2c).
- Remove any grinding-induced damage to avoid residual surface stress.
- Equipment & verification:
- Testing machine and Vickers indenter in accordance with ISO 6507‑2.
- Reference blocks per ISO 6507‑3: reference hardness should not differ from the tested material by more than 20%.
- Data and reporting:
- Multiple valid indentations (normally at least five, subject to spacing criteria) with measured diagonal and crack sizes.
- Report test load, dwell time, number of indentations, specimen preparation, and calculation method for K_I,IF.
- Important note: K_I,IF (indentation fracture resistance) estimates resistance to crack initiation from a localized damage source and is not equivalent to macroscopic fracture toughness K_Ic determined by other fracture mechanics tests.
Applications
- Quality assurance and lot-to-lot comparison of silicon nitride bearing balls used in high-speed or high-reliability rolling-element bearings.
- Screening materials for resistance to localized damage, with relevance to wear resistance, rolling contact fatigue, and machining-induced damage behavior.
- Supporting materials development and process control in manufacturers of advanced ceramics and bearing components.
Who should use this standard
- Materials engineers, quality managers, and test laboratories in ceramic bearing manufacturing.
- R&D teams developing silicon nitride formulations or finishing processes.
- Certification bodies and suppliers who require harmonized, repeatable IF-based fracture-resistance data.
Related standards
- ISO 26602 - Silicon nitride materials for rolling bearing balls
- ISO 6507‑2 / ISO 6507‑3 - Vickers hardness testing and reference blocks
- ISO 4287 - Surface texture (profile method)
- ISO 17561 - Elastic moduli of monolithic ceramics
- ISO/IEC 17025 - Laboratory competence
Keywords: EN ISO 14627:2025, ISO 14627, silicon nitride, indentation fracture (IF) method, Vickers indenter, fracture resistance, rolling bearing balls, advanced ceramics, quality assurance.
Frequently Asked Questions
SIST EN ISO 14627:2026 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Fine ceramics (advanced ceramics, advanced technical ceramics) - Test method for fracture resistance of silicon nitride materials for rolling bearing balls at room temperature by indentation fracture (IF) method (ISO 14627:2012)". This standard covers: ISO 14627:2012 describes a test method that covers the determination of fracture resistance of silicon nitride bearing balls at room temperature by the indentation fracture (IF) method, as specified in ISO 26602. ISO 14627:2012 is intended for use with monolithic silicon nitride ceramics for bearing balls. It does not include other ceramic materials. ISO 14627:2012 is for material comparison and quality assurance.
ISO 14627:2012 describes a test method that covers the determination of fracture resistance of silicon nitride bearing balls at room temperature by the indentation fracture (IF) method, as specified in ISO 26602. ISO 14627:2012 is intended for use with monolithic silicon nitride ceramics for bearing balls. It does not include other ceramic materials. ISO 14627:2012 is for material comparison and quality assurance.
SIST EN ISO 14627:2026 is classified under the following ICS (International Classification for Standards) categories: 81.060.30 - Advanced ceramics. The ICS classification helps identify the subject area and facilitates finding related standards.
You can purchase SIST EN ISO 14627:2026 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 SIST standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2026
Fina keramika (sodobna keramika, sodobna tehnična keramika) - Preskusna
metoda za odpornost proti lomu silicijevih nitridnih materialov za kroglice kotalnih
ležajev pri sobni temperaturi z metodo vtiska loma (IF) (ISO 14627:2012)
Fine ceramics (advanced ceramics, advanced technical ceramics) - Test method for
fracture resistance of silicon nitride materials for rolling bearing balls at room
temperature by indentation fracture (IF) method (ISO 14627:2012)
Hochleistungskeramik - Prüfverfahren für die Bestimmung der Bruchzähigkeit mit Hilfe
von Vickers-Härteeindrücken bei Raumtemperatur an Wälzlagerkugeln aus Siliziumnitrid
(ISO 14627:2012)
Céramiques techniques - Méthode d'essai de résistance à la rupture des matériaux
nitrure de silicium pour billes de roulement à billes à température ambiante par la
méthode de rupture par indentation (ISO 14627:2012)
Ta slovenski standard je istoveten z: EN ISO 14627:2025
ICS:
81.060.30 Sodobna keramika Advanced ceramics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 14627
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2025
EUROPÄISCHE NORM
ICS 81.060.30
English Version
Fine ceramics (advanced ceramics, advanced technical
ceramics) - Test method for fracture resistance of silicon
nitride materials for rolling bearing balls at room
temperature by indentation fracture (IF) method (ISO
14627:2012)
Céramiques techniques - Méthode d'essai de résistance Hochleistungskeramik - Prüfverfahren für die
à la rupture des matériaux nitrure de silicium pour Bestimmung der Bruchzähigkeit mit Hilfe von Vickers-
billes de roulement à billes à température ambiante Härteeindrücken bei Raumtemperatur an
par la méthode de rupture par indentation (ISO Wälzlagerkugeln aus Siliziumnitrid (ISO 14627:2012)
14627:2012)
This European Standard was approved by CEN on 24 November 2025.
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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14627:2025 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
The text of ISO 14627:2012 has been prepared by Technical Committee ISO/TC 206 "Fine ceramics” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO 14627:2025
by Technical Committee CEN/TC 184 “Advanced technical ceramics” the secretariat of which is held by
DIN.
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 May 2026, and conflicting national standards shall be
withdrawn at the latest by May 2026.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
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 14627:2012 has been approved by CEN as EN ISO 14627:2025 without any modification.
INTERNATIONAL ISO
STANDARD 14627
First edition
2012-07-15
Fine ceramics (advanced ceramics,
advanced technical ceramics) — Test
method for fracture resistance of silicon
nitride materials for rolling bearing balls
at room temperature by indentation
fracture (IF) method
Céramiques techniques — Méthode d’essai de résistance à la rupture
des matériaux nitrure de silicium pour billes de roulement à billes à
température ambiante par la méthode de rupture par indentation
Reference number
ISO 14627:2012(E)
©
ISO 2012
ISO 14627:2012(E)
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO’s
member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2012 – All rights reserved
ISO 14627:2012(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 Testing machine . 2
5.2 Indenter . 2
5.3 Verification by standard reference materials . 3
6 Test specimens . 3
6.1 General . 3
6.2 Thickness . 3
6.3 Surface finish . 3
7 Procedure . 3
7.1 Specimen placement . 3
7.2 Specimen leveling . 3
7.3 Clean the indenter . 3
7.4 Application of test load . 3
7.5 Acceptability of indentations . 4
7.6 Number of indentations . 4
7.7 Measurement of indentation size . 5
7.8 Measurement of crack size . 5
8 Calculation . 5
9 Test report . 6
Bibliography . 8
ISO 14627:2012(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 14627 was prepared by Technical Committee ISO/TC 206, Fine ceramics.
iv © ISO 2012 – All rights reserved
INTERNATIONAL STANDARD ISO 14627:2012(E)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Test method for fracture resistance of silicon
nitride materials for rolling bearing balls at room temperature
by indentation fracture (IF) method
1 Scope
This International Standard describes a test method that covers the determination of fracture resistance of silicon
nitride bearing balls at room temperature by the indentation fracture (IF) method, as specified in ISO 26602.
This International Standard is intended for use with monolithic silicon nitride ceramics for bearing balls. It does
not include other ceramic materials.
This International Standard is for material comparison and quality assurance.
Indentation fracture resistance, K as defined in this International Standard is not to be equated to fracture
I, IFR
toughness determined using other test methods such as K and K .
Isc Ipb
NOTE K is an estim
...
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