ISO 23717:2022

Steel wire and wire products - Hose reinforcement wire

This document specifies the composition, dimensions and mechanical properties of steel wire with a high mass fraction of carbon, generally brass coated, for reinforcing high-pressure hoses. It is applicable to multiple parallel wires, braided or spirally wrapped for reinforcement in a rubber or synthetic hose that is made to withstand a relatively high bursting pressure.

Fils et produits tréfilés en acier — Fil d'armature pour flexibles

General Information

• Status: Published
• Publication Date: 10-Mar-2022
• ICS: 77.140.65 - Steel wire, wire ropes and link chains
• Technical Committee: ISO/TC 17/SC 17 - Steel wire rod and wire products
• Drafting Committee: ISO/TC 17/SC 17/WG 16 - Hose reinforcement wire
• Current Stage: 6060 - International Standard published
• Start Date: 11-Mar-2022
• Due Date: 27-Sep-2022
• Completion Date: 11-Mar-2022

Relations

• Revises: ISO 23717:2006 - Steel wire and wire products - Hose reinforcement wire
• Effective Date: 23-Apr-2020

Overview

ISO 23717:2022 specifies requirements for hose reinforcement wire - high-carbon steel wire, generally brass coated, intended for reinforcing high‑pressure rubber or synthetic hoses. The standard covers composition, manufacturing basis, dimensions, mechanical properties and testing for multiple parallel wires used as braided or spirally wrapped reinforcement in hoses designed to withstand relatively high bursting pressures.

Example designation: Hose wire brass coated ISO 23717‑HT‑0,30.

Key topics and technical requirements

• Material and manufacture
  • Wire produced from steel rod per ISO 16120 series; wire is patented or hard‑rolled and cold drawn to achieve required properties.
  • Default coating: brass with Cu = (67.5 ± 4) % (other coatings by agreement).
• Tensile strength classes
  • Five classes: LT (2 150–2 450 MPa), NT (2 450–2 750 MPa), HT (2 750–3 050 MPa), ST (3 050–3 350 MPa), UT (3 350–3 650 MPa).
  • Standard provides tensile strength or breaking‑load ranges, and minimum elongation requirements by nominal diameter.
• Mechanical testing
  • Mandatory tests include tensile test (ISO 6892‑1), reverse bend test (ISO 7801) and torsion test (ISO 7800), with minimum cycles specified per diameter/class.
  • Tests apply both before and after braiding operations where required.
• Surface and dimensional controls
  • Requirements for surface quality, coating mass, diameter tolerances, out‑of‑roundness, and acceptance criteria for cast and tip rise/dead cast.
• Delivery, marking and inspection
  • Specification of delivery conditions (packaging, spools), weld limits, inspection documentation (e.g., ISO 10474) and labelling requirements.
• Recent updates (2022 edition)
  • Added Annex on packaging, updated classification and Cu content, introduced breaking‑load values and cast/tip‑rise requirements, revised diameter tolerances and tests.

Applications

• Reinforcement wires for high‑pressure hydraulic hoses, industrial hoses and flexible lines where high bursting pressure and fatigue resistance are critical.
• Used in braided or spiral constructions in automotive, mobile hydraulics, oil & gas and industrial hydraulic systems.

Who uses this standard

• Steel wire manufacturers (production and quality control)
• Hose producers and braiders integrating reinforcement wire
• Purchasers and specification writers (to order correctly designated wire)
• Testing laboratories and inspectors performing acceptance tests
• Design and R&D engineers specifying hose reinforcement materials

Related standards

• ISO 16120‑1/2/4 (wire rod requirements)
• ISO 6892‑1 (tensile testing)
• ISO 7800 / ISO 7801 (torsion and reverse bend tests)
• ISO 10474 (inspection documents)
• ISO 23475‑1 (tyre cord testing methods)

Keywords: ISO 23717:2022, hose reinforcement wire, brass coated wire, high tensile steel wire, high‑pressure hoses, tensile strength classes, wire testing, wire dimensions.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 23717
Second edition
2022-03
Steel wire and wire products — Hose
reinforcement wire
Fils et produits tréfilés en acier — Fil d'armature pour flexibles
Reference number
© ISO 2022
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 Classification . 2
5 Designation and ordering .2
5.1 Designation . 2
5.2 Information supplied by the purchaser and items to be agreed upon. 2
6 Requirements . 3
6.1 Material . 3
6.1.1 Steel . 3
6.1.2 Chemical composition . 3
6.1.3 Wire. 3
6.1.4 Coating material . 3
6.2 Mechanical properties . 3
6.2.1 Tensile strength, breaking load and elongation . 3
6.2.2 Reverse bend test . . 3
6.2.3 Torsion test . 3
6.3 Surface quality . 6
6.3.1 General . 6
6.3.2 Coating mass . 6
6.3.3 Cast and tip rise/dead cast . 6
6.4 Dimensions and tolerances . . . 6
6.4.1 Tolerance on diameter . 6
6.4.2 Out of roundness . 6
6.5 Delivery conditions . . 7
6.5.1 Unit package . 7
6.5.2 Welds . . 7
7 Testing and inspection .7
7.1 Testing and inspection documents . 7
7.2 Scope of test programme for acceptance inspection. 7
7.3 Test procedures . 7
7.3.1 Tensile test . 7
7.3.2 Reverse bend test and torsion test . 7
7.3.3 Diameter and out of roundness . 7
7.3.4 Cast and tip rise/dead cast . 8
7.3.5 Coating test . 8
7.4 Retests . 8
8 Marking, labelling and packaging .8
Annex A (informative) Packaging of hose reinforcement wire . 9
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 documents 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).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
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 23717:2006), which has been technically
revised.
The main changes are as follows:
— Annex A on packaging added;
— Clause 2 updated;
— Clause 3 updated;
— classification from LT to UT updated (see Clause 4);
— Cu content of coating updated (see 6.1.4);
— breaking load for mechanical properties added (see 6.2.1 and Table 1);
— product list and mechanical properties updated (see Table 1);
— cast and tip rise/dead cast requirement added (see 6.3.3 and Table 3);
— tolerance on diameter updated (see Table 4);
— welds requirement updated (see 6.5.2);
— test procedures for Cast and tip rise/dead cast and coating test added (see 7.3.4 and 7.3.5);
— labelling information for packing updated (see Table 5).
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
v
INTERNATIONAL STANDARD ISO 23717:2022(E)
Steel wire and wire products — Hose reinforcement wire
1 Scope
This document specifies the composition, dimensions and mechanical properties of steel wire with a
high mass fraction of carbon, generally brass coated, for reinforcing high-pressure hoses.
It is applicable to multiple parallel wires, braided or spirally wrapped for reinforcement in a rubber or
synthetic hose that is made to withstand a relatively high bursting pressure.
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 404, Steel and steel products — General technical delivery requirements
ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature
ISO 7800, Metallic materials — Wire — Simple torsion test
ISO 7801, Metallic materials — Wire — Reverse bend test
ISO 10474, Steel and steel products — Inspection documents
ISO 16120-1, Non-alloy steel wire rod for conversion to wire — Part 1: General requirements
ISO 16120-2, Non-alloy steel wire rod for conversion to wire — Part 2: Specific requirements for general
purpose wire rod
ISO 16120-4, Non-alloy steel wire rod for conversion to wire — Part 4: Specific requirements for wire rod
for special applications
ISO 23475-1, Testing method for steel tyre cord — Part 1: General requirements
3 Terms and definitions
For the purposes of this document, the following terms and definitions 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
nominal diameter
d
value of the diameter by which the wire is designated and specified by the purchaser
Note 1 to entry: The nominal diameter is expressed in millimetres.
Note 2 to entry: This is the basis on which the values of all relevant characteristics are determined for the
acceptance of the wire.
3.2
out of roundness
arithmetic difference between the maximum and minimum diameter measured in a transverse cross-
section perpendicular to the wire axis
3.3
cast
smallest external diameter of a wire loops naturally formed when placed on a smooth surface without
external tension
3.4
tip rise/dead cast
vertical height of the cut wire end that protrudes above the flat and smooth surface, on which the wire
is placed without external tension
4 Classification
Hose wire is classified according to five classes of tensile strength.
— LT: Low
...