ISO 17590:2025

Fine ceramics (advanced ceramics, advanced technical ceramics) — Methods of tests for reinforcements — Determination of the tensile properties of ceramic filaments at elevated temperature in air using the hot grip technique

This document specifies a test method for determination of tensile properties, such as tensile strength, Young’s modulus, and fracture strain of ceramic filaments at elevated temperature in air using the hot grip technique. This document applies to continuous ceramic filaments obtained either from a multifilament bundle or spool. This document does not apply to ceramic filaments with creep behaviour at test temperature. The hot grip technique is limited by the temperature resistance of the current ceramic adhesive.

Céramiques techniques — Méthodes d'essais pour renforts — Détermination des propriétés en traction des filaments à température élevée par la technique des mors chauds

General Information

• Status: Published
• Publication Date: 01-Jul-2025
• ICS: 81.060.30 - Advanced ceramics
• Technical Committee: ISO/TC 206 - Fine ceramics
• Drafting Committee: ISO/TC 206 - Fine ceramics
• Current Stage: 6060 - International Standard published
• Start Date: 02-Jul-2025
• Due Date: 13-Jul-2025
• Completion Date: 02-Jul-2025

Standards Content (Sample)

International
Standard
ISO 17590
First edition
Fine ceramics (advanced ceramics,
2025-07
advanced technical ceramics) —
Methods of tests for reinforcements
— Determination of the tensile
properties of ceramic filaments at
elevated temperature in air using
the hot grip technique
Céramiques techniques — Méthodes d'essais pour renforts
— Détermination des propriétés en traction des filaments à
température élevée par la technique des mors chauds
Reference number
© ISO 2025
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
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 3
5.1 Tensile testing machine .3
5.2 Grip system .3
5.3 Specimen holding device .3
5.4 Adhesive .4
5.5 Thermocouples .4
5.6 Heating device .4
6 Test specimen gauge length . 5
7 Test specimen preparation . 5
7.1 Size removal .5
7.2 Test specimen assembly .5
7.3 Filament selection . .6
7.4 Filament gluing . .7
7.5 Filament initial cross-section area determination.7
7.6 Number of test specimens .7
8 Test procedure . 7
8.1 Load cell .7
8.2 Specimen mounting . .7
8.3 Specimen adjusting .7
8.4 Furnace heating .7
8.5 Displacement rate setting .8
8.6 Measurement .8
8.7 Test validity .8
9 Calculation of results . 8
9.1 Tensile strength .8
9.2 Total compliance .8
9.3 Load train compliance .9
9.4 Young’s modulus.10
9.5 Fracture strain .10
10 Test report .11
Bibliography .12

iii
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 206, Fine Ceramics.
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 17590:2025(en)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Methods of tests for reinforcements —
Determination of the tensile properties of ceramic filaments
at elevated temperature in air using the hot grip technique
1 Scope
This document specifies a test method for determination of tensile properties, such as tensile strength,
Young’s modulus, and fracture strain of ceramic filaments at elevated temperature in air using the hot grip
technique. This document applies to continuous ceramic filaments obtained either from a multifilament
bundle or spool. This document does not apply to ceramic filaments with creep behaviour at test temperature.
The hot grip technique is limited by the temperature resistance of the current ceramic adhesive.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 7500-1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 10548, Carbon fibre — Determination of size content
ISO 11567, Carbon fibre — Determination of filament diameter and cross-sectional area
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
ISO 19634, Fine ceramics (advanced ceramics, advanced technical ceramics) — Ceramic composites — Notations
and symbols
IEC 60584-1, Thermocouples — Part 1: EMF specifications and tolerances
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 19634 and the following apply.
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/
3.1
gauge length
L
initial inner distance between tubular grips glued to fibre ends at room temperature

3.2
initial cross-section area
S
initial area of the cross section of the filament within the gauge length (3.1) determined at room temperature
[SOURCE: ISO 19630:2017, 3.3, modified — “determined at room temperature” added to definition.]
3.3
maximum tensile force
F
m
highest recorded tensile force on the test specimen when tested to failure
[SOURCE: ISO 19630:2017, 3.4.]
3.4
tensile strength
σ
m
ratio of the maximum tensile force (3.4) to the initial cross-section area (3.2)
[SOURCE: ISO 19630:2017, 3.6]
3.5
total compliance
C
t
inverse of the slope in the linear part of the force/displacement curve
[SOURCE: ISO 19630:2017, 3.8]
3.6
load train compliance
C
l
ratio of the displacement, excluding any test specimen contribution, to the corresponding force during the
tensile test
[SOURCE: ISO 19630:2017, 3.9]
3.7
strain
...

FINAL DRAFT
International
Standard
ISO/FDIS 17590
ISO/TC 206
Fine ceramics (advanced ceramics,
Secretariat: JISC
advanced technical ceramics) —
Voting begins on:
Methods of tests for reinforcements
2025-04-10
— Determination of the tensile
Voting terminates on:
properties of ceramic filaments at
2025-06-05
elevated temperature in air using
the hot grip technique
Céramiques techniques — Méthodes d'essais pour renforts
— Détermination des propriétés en traction des filaments à
température élevée par la technique des mors chauds
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
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
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.
Reference number
ISO/FDIS 17590:2025(en) © ISO 2025

FINAL DRAFT
ISO/FDIS 17590:2025(en)
International
Standard
ISO/FDIS 17590
ISO/TC 206
Fine ceramics (advanced ceramics,
Secretariat: JISC
advanced technical ceramics) —
Voting begins on:
Methods of tests for reinforcements
— Determination of the tensile
Voting terminates on:
properties of ceramic filaments at
elevated temperature in air using
the hot grip technique
Céramiques techniques — Méthodes d'essais pour renforts
— Détermination des propriétés en traction des filaments à
température élevée par la technique des mors chauds
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.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
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 Reference number
ISO/FDIS 17590:2025(en) © ISO 2025

ii
ISO/FDIS 17590:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 3
5.1 Tensile testing machine .3
5.2 Grip system .3
5.3 Specimen holding device .3
5.4 Adhesive .4
5.5 Thermocouples .4
5.6 Heating device .4
6 Test specimen gauge length . 5
7 Test specimen preparation . 5
7.1 Size removal .5
7.2 Test specimen assembly .5
7.3 Filament selection . .6
7.4 Filament gluing . .7
7.5 Filament initial cross-section area determination.7
7.6 Number of test specimens .7
8 Test procedure . 7
8.1 Load cell .7
8.2 Specimen mounting . .7
8.3 Specimen adjusting .7
8.4 Furnace heating .7
8.5 Displacement rate setting .8
8.6 Measurement .8
8.7 Test validity .8
9 Calculation of results . 8
9.1 Tensile strength .8
9.2 Total compliance .8
9.3 Load train compliance .9
9.4 Young’s modulus.10
9.5 Fracture strain .10
10 Test report .11
Bibliography .12

iii
ISO/FDIS 17590:2025(en)
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 206, Fine Ceramics.
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
FINAL DRAFT International Standard ISO/FDIS 17590:2025(en)
Fine ceramics (advanced ceramics, advanced technical
ceramics) — Methods of tests for reinforcements —
Determination of the tensile properties of ceramic filaments
at elevated temperature in air using the hot grip technique
1 Scope
This document specifies a test method for determination of tensile properties, such as tensile strength,
Young’s modulus, and fracture strain of ceramic filaments at elevated temperature in air using the hot grip
technique. This document applies to continuous ceramic filaments obtained either from a multifilament
bundle or spool. This document does not apply to ceramic filaments with creep behaviour at test temperature.
The hot grip technique is limited by the temperature resistance of the current ceramic adhesive.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 7500-1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 10548, Carbon fibre — Determination of size content
ISO 11567, Carbon fibre — Determination of filament diameter and cross-sectional area
ISO/IEC 17025, General requirements for the co
...

ISO/DISFDIS 17590:2024(en)
ISO /TC 206/WG 4
Secretariat: JISC
Date: 2025-02-0603-26
Fine ceramics (advanced ceramics, advanced technical ceramics) —
Methods of tests for reinforcements — Determination of the tensile
properties of ceramic filaments at elevated temperature in air using
the hot grip technique
Céramiques techniques — Méthodes d'essais pour renforts — Détermination des propriétés en traction des
filaments à température élevée par la technique des mors chauds
FDIS stage
ISO/FDIS 17590:2025(en)
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
EmailE-mail: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii
ISO/DISFDIS 17590:20242025(en)
Contents
Foreword . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Apparatus . 3
6 Test specimen gauge length . 5
7 Test specimen preparation . 6
8 Test procedure . 9
9 Calculation of results . 10
10 Test report . 13
Bibliography . 15

Foreword . iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 3
5 Apparatus . 3
5.1 Tensile testing machine . 3
5.2 Grip system . 3
5.3 Specimen holding device . 3
5.4 Adhesive . 4
5.5 Thermocouples . 4
5.6 Heating device . 4
6 Test specimen gauge length . 5
7 Test specimen preparation . 5
7.1 Size removal . 5
7.2 Test specimen assembly . 5
7.3 Filament selection . 6
7.4 Filament gluing . 6
7.5 Filament initial cross-section area determination . 7
7.6 Number of test specimens . 7
8 Test procedure . 7
8.1 Load cell . 7
8.2 Specimen mounting . 7
8.3 Specimen adjusting . 7
iii
ISO/FDIS 17590:2025(en)
8.4 Furnace heating . 7
8.5 Displacement rate setting . 8
8.6 Measurement . 8
8.7 Test validity . 8
9 Calculation of results . 8
9.1 Tensile strength . 8
9.2 Total compliance . 8
9.3 System compliance . 9
9.4 Young’s modulus . 10
9.5 Fracture strain . 10
10 Test report . 10
Bibliography . 12
iv
ISO/DISFDIS 17590:20242025(en)
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.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.htmlwww.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 206, Fine Ceramics.
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.
Field Code Changed
v
DRAFT International Standard ISO/DIS 17590:2024(en)

Fine ceramics (advanced ceramics, advanced technical ceramics) —
Methods of tests for reinforcements — Determination of the tensile
properties of ceramic filaments at elevated temperature in air using
the hot grip technique
1 Scope
This document specifies a test method for determination of tensile properties, such as tensile strength, Young’s
modulus, and fracture strain of ceramic filaments at elevated temperature in air using the hot grip technique.
This document applies to continuous ceramic filaments obtained either from a multifilament bundle or spool.
This document does not apply to ceramic filaments with creep behaviour at test temperature. The hot grip
technique is limited by the temperature resistance of the current ceramic adhesive.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
ISO 7500--1, Metallic materials — Calibration and verification of static uniaxial testing machines — Part 1:
Tension/compression testing machines — Calibration and verification of the force-measuring system
ISO 10548, Carbon fibre — Determination of size content
ISO 11567, Carbon fibre — Determination of filament diameter and cross-sectional area
ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
ISO 19634, Fine ceramics (advanced ceramics, advanced technical ceramics) — Ceramic composites —
Notations and symbols
IEC 60584--1, Thermocouples — Part 1: EMF specifications and tolerances
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 19634 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— — ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp
— — IEC Electropedia: available at https://www.electropedia.org/https://www.electropedia.org/
3.1 3.1
gauge length
L
initial inner distance between tubular grips glued to fibre ends at room temperature
[SOURCE: ISO 19630:2017, 3.1]
ISO/FDIS 17590:2025(en)
3.2 3.2
initial cross-section area
S
initial area of the cross section of the filament within the gauge length (3.1)(3.1) determined at room
temperature
[SOURCE: ISO 19630:2017, 3.3, modified — definition has been revised, “determined at room temperature”
has been added to definition.]
3.3 3.3
maximum tensile force
Fm
highest recorded tensile force on the test specimen when tested to failure
[SOURCE: ISO 19630:2017, 3.4.]
3.4 3.4
tensile strength
σm
ratio of the maximum tensile force (3.4)(3.4) to the initial cross-section area (3.2)(3.2)
[SOURCE: ISO 19630:2017, 3.6]
3.5 3.5
total compliance
Ct
inverse of the slope in the linear part of the force/displacement curve
[SO
...