ISO 16650:2025

FINAL DRAFT
International
Standard
ISO/FDIS 16650
ISO/TC 17/SC 17
Bead wire
Secretariat: SAC
Fil d'acier pour tringle
Voting begins on:
2025-05-30
Voting terminates on:
2025-07-25
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 16650:2025(en) © ISO 2025

FINAL DRAFT
ISO/FDIS 16650:2025(en)
International
Standard
ISO/FDIS 16650
ISO/TC 17/SC 17
Bead wire
Secretariat: SAC
Fil d'acier pour tringle
Voting begins on:
Voting terminates on:
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/FDIS 16650:2025(en) © ISO 2025

ii
ISO/FDIS 16650:2025(en)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 2
5 Designation and ordering . 2
5.1 Designation .2
5.2 Information to be supplied by the purchaser.2
6 Requirements . 3
6.1 Chemical composition of steel .3
6.2 Metallic coating .3
6.3 Cumar weight .3
6.4 Mechanical properties .3
6.4.1 General .3
6.4.2 Tensile test results .3
6.4.3 Torsion test .5
6.5 Surface quality .5
6.5.1 General .5
6.5.2 Coating thickness .5
6.6 Delivery conditions . .5
6.6.1 Unit package .5
6.6.2 Welds . .5
6.6.3 Wire straightness .6
6.6.4 Residual torsion .6
6.7 Dimensions and tolerances . .6
6.7.1 Size tolerances .6
6.7.2 Requirements for adhesion .6
7 Testing and inspection . 6
7.1 Tests and inspection documents .6
7.2 Programme for specific inspection .6
7.3 Test procedures .6
7.3.1 Chemical composition .6
7.3.2 Tensile test .7
7.3.3 Torsion test .7
7.3.4 Diameter and out-of-roundness .7
7.3.5 Straightness .7
7.3.6 Residual torsions .7
7.3.7 Adhesion test .7
7.4 Retests .7
8 Marking, labelling, packaging and shelf life . 7
Annex A (informative) Adhesion testing . 9
Annex B (informative) Pulling out test clamp .12
Annex C (informative) Spool .13
Bibliography .15

iii
ISO/FDIS 16650:2025(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 17, Steel, Subcommittee SC 17, Steel wire rod
and wire products.
This second edition cancels and replaces the first edition (ISO 16650:2004), which has been technically
revised.
The main changes are as follows:
— the terms and definitions clause (Clause 3) has been revised;
— super tensile strength has been added in Clause 4;
— the table of chemical composition (former Table 1) of steel has been deleted and subsequent tables have
been renumbered;
— metallic coating (6.2) has been revised;
— cumar weight (6.3) has been added;
— the mechanical properties (6.4) has been revised;
— surface quality (6.5) has been revised;
— delivery conditions (6.6) has been revised;
— torsion test (6.4.3) has been revised;
— adhesion testing (Annex A) has been revised.
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 16650:2025(en)
Bead wire
1 Scope
This document specifies the requirements and characteristics of round and flat wire used for strengthe
...

ISO/DISFDIS 16650:2024(en)
ISO /TC 17/SC 17/WG 20
Secretariat: SAC
Date: 2025-04-0705-16
Bead wire
Fil d'acier pour tringle
FDIS stage
ISO/DISFDIS 16650:2025(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: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii © ISO #### 2025 – All rights reserved
ii
ISO/DISFDIS 16650:20242025(en)
Contents
Foreword . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification. 2
5 Designation and ordering . 2
6 Requirements . 3
7 Testing and inspection . 7
8 Marking, labelling, packaging and shelf life . 9
Annex A (informative) Adhesion testing . 10
Annex B (informative) Pulling out test clamp . 16
Annex C (informative) Spool . 19
Bibliography . 21

Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification. 2
5 Designation and ordering . 2
5.1 Designation . 2
5.2 Information to be supplied by the purchaser . 2
6 Requirements . 2
6.1 Chemical Composition of steel . 2
6.2 Metallic coating . 2
6.3 Cumar weight . 3
6.4 Mechanical properties . 3
6.4.1 General.3
6.4.2 Tensile test results.3
6.4.2.1 General.3
6.4.2.2 Tensile strength.3
6.4.2.3 Elongation at fracture.5
6.4.2.4 Yiled ratio.5
iii
ISO/DISFDIS 16650:2025(en)
6.4.3 Tosion test.5
6.5 Surface quality.5
6.5.1 General.5
6.5.2 Coating thickness.5
6.6 Delivery conditions . 5
6.6.1 Unit package.5
6.6.2 Welds.5
6.6.3 Wire straightness.6
6.6.4 Residual torsion.6
6.7 Dimensions and tolerances . 6
6.7.1 Size tolerances.6
6.7.2 Requirements for adhesion.6

7 Testing and inspection . 6
7.1 Tests and inspection documents . 6
7.2 Programme for specific inspection. 6
7.3 Test procedures . 6
7.3.1 Chemical compostion.6
7.3.2 Tensile test.7
7.3.3 Torsion test.7
7.3.4 Diameter and out-of-roundness.7
7.3.5 Straightness.7
7.3.6 Residual torsions.7
7.3.7 Adhesion test.7
7.4 Retests . 7
8 Marking, labelling, packaging and shelf life . 7
Annex A (informative) Adhesion testing . 9
A.1 Principle.9
A.2 Vulcanizing mould.9
A.3 Upper mould plate.10
A.4 Bottom plate mould plate.11
Annex B (informative) Pulling out test clamp . 12
iv © ISO #### 2025 – All rights reserved
iv
ISO/DISFDIS 16650:20242025(en)
Annex C(informative)Spool . 13

v
ISO/DISFDIS 16650:2025(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.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
...