EN 10323:2004
(Main)Steel wire and wire products - Bead wire
Steel wire and wire products - Bead wire
This document specifies composition, dimensions and mechanical properties of round and flat wire used for strengthening the bead of all kinds of tyres.
Stahldraht und Drahterzeugnisse - Reifeneinlegedraht
Dieses Dokument legt die Zusammensetzung, die Maße und die mechanischen Eigenschaften von rundem und flachem Draht fest, der zur Verstärkung des Wulstes von Reifen aller Art verwendet wird.
Fils et produits tréfilés en acier - Fil pour tringle
La présente Norme européenne spécifie la composition, les dimensions, les propriétés mécaniques de fils ronds et plats utilisés pour renforcer la nervure de tous types de pneumatiques.
Steel wire and wire products - Bead wire
General Information
- Status
- Published
- Publication Date
- 01-Sep-2004
- Withdrawal Date
- 30-Mar-2005
- Technical Committee
- ECISS/TC 106 - Wire rod and wires
- Drafting Committee
- ECISS/TC 30/SC 2 - Steel wire for springs
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 03-Sep-2025
- Completion Date
- 23-Sep-2025
Overview
EN 10323:2004 - Steel wire and wire products - Bead wire (CEN) specifies the composition, dimensions and mechanical properties of round and flat steel wire used to strengthen the bead area of tyres. The standard covers material requirements, metallic coatings, dimensional tolerances, mechanical tests and delivery/marking rules for bead wire supplied for all kinds of tyres.
Key topics and technical requirements
- Material and chemistry: Wire is manufactured from steel rod complying with EN 10016 series. Chemical limits are specified for carbon, silicon and manganese for the two tensile classes (NT and HT).
- NT and HT have different C/Si/Mn ranges (see standard heat-analysis tables).
- Tensile classes: Two classes - NT (normal tensile) and HT (high tensile). Indicative tensile strengths vary with diameter (roughly NT ≈ 1 650–2 200 MPa; HT ≈ 2 200–2 350 MPa in the standard’s tables).
- Mechanical properties and tests: Mandatory tensile tests (EN 10002-1 / EN 10218-1) with minimum breaking force, elongation (typically ≥ 5 %) and 0.2 % proof stress requirements. Torsion testing (after thermal ageing) with minimum number of torsions per diameter is specified.
- Coatings: Round wire may be brass, bronze 1 or bronze 2 coated; flat bead wire is brass coated only. Coating composition and thickness limits are defined (e.g. brass ~0.15 ± 0.05 µm; bronze variants per Table 4).
- Dimensions and tolerances: Diameter tolerances for round wire (e.g. ±0.02 mm for d ≤ 1.60 mm; ±0.03 mm for larger sizes). Flat wire tolerances (e.g. 3.0 × 1.5 mm with ±0.05 mm width, ±0.03 mm thickness).
- Delivery & inspection: Unit packages on spools (recommended spool types in Annex B), allowance for welds if they meet breaking force requirements, straightness and residual torsion checks. Inspection documents per EN 10204 and general delivery rules per EN 10021.
- Adhesion testing: If required by purchaser, adhesion methods (example ASTM D1871 Method 1 in Annex A) are used to verify coating adhesion to wire.
Applications and users
- Primary use: tyre bead reinforcement in passenger, truck and specialty tyres.
- Who uses it: tyre manufacturers, wire producers and suppliers, OEMs in automotive and tyre engineering, quality/inspection teams, procurement specifying bead wire, and test laboratories validating compliance.
- Practical benefits: ensures consistent mechanical performance, reliable coating adhesion for rubber bonding, traceable delivery and compatibility with tyre assembly processes.
Related standards
- EN 10016-1/2/4 (steel rod for drawing), EN 10002-1 (tensile testing), EN 10218-1/2 (wire test methods/dimensions), EN 10244-1 (coating thickness), EN 10021 (delivery requirements), EN 10204 (inspection documents), and CR 10261. Annex A references ASTM D1871 for adhesion testing.
Keywords: EN 10323, bead wire, steel wire, tyre reinforcement, brass coated wire, bronze coated wire, tensile strength NT HT, coating thickness, wire dimensions, CEN standard.
Frequently Asked Questions
EN 10323:2004 is a standard published by the European Committee for Standardization (CEN). Its full title is "Steel wire and wire products - Bead wire". This standard covers: This document specifies composition, dimensions and mechanical properties of round and flat wire used for strengthening the bead of all kinds of tyres.
This document specifies composition, dimensions and mechanical properties of round and flat wire used for strengthening the bead of all kinds of tyres.
EN 10323:2004 is classified under the following ICS (International Classification for Standards) categories: 77.140.65 - Steel wire, wire ropes and link chains. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 10323:2004 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Steel wire and wire products - Bead wireStahldraht und Drahterzeugnisse - ReifeneinlegedrahtFils et produits tréfilés en acier - Fil
pour tringleSteel wire and wire products - Bead wire77.140.65Jeklene žice, jeklene vrvi in verigeSteel wire, wire ropes and link chainsICS:Ta slovenski standard je istoveten z:EN 10323:2004SIST EN 10323:2004en01-november-2004SIST EN 10323:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10323September 2004ICSEnglish versionSteel wire and wire products - Bead wireFils et produits tréfilés en acier - Fil
pour tringleStahldraht und Drahterzeugnisse - ReifeneinlegedrahtThis European Standard was approved by CEN on 1 July 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10323:2004: ESIST EN 10323:2004
Adhesion testing.13 Annex B (informative)
Bead wire.14 Bibliography.16
EN 10244-1, Steel wire and wire products – Non-ferrous metallic coatings on steel wire – Part 1: General principles CR 10261, ECISS Information circular 11 – Iron and steel – Review of available methods of chemical analysis 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 nominal diameter: d value of the diameter, expressed in millimetres, by which the wire is designated and specified by the purchaser NOTE This is the basis on which the values of all relevant characteristics are determined for the acceptance of the wire 3.2 actual diameter arithmetic mean of two measurements of the diameter at right angles determined at any cross-section 3.3 out of roundness arithmetic difference between the maximum and minimum diameters measured in a transverse cross-section perpendicular to the wire axis SIST EN 10323:2004
It is supplied in two classes of tensile strength: NT: Normal tensile strength; HT: High tensile strength. 5 Designation and ordering 5.1 Designation For products supplied in accordance with this document, the designation shall state in the following order: the term: bead wire; for flat wire after the term bead wire: flat; the coating: see 6.1.3; the number of this document; for flat wire the dimensions expressed as width x thickness: 3 x 1,5; the tensile strength class (see 4); for round wire the nominal diameter. EXAMPLE Bronze coated bead wire 1,295 mm high tensile strength conforming to EN 10323 shall be designated:
Bead wire bronze coated EN 10323 HT 1,295. 5.2 Information to be supplied by the purchaser The purchaser shall clearly state in his enquiry or order the product and following information: for round wire the nominal diameter; the desired quantity; the unit and type of delivery; if cumar residue coating is required (see 6.1.3); if an adhesion test is required and if
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