Non-alloy steel wire rod for conversion to wire - Part 1: General requirements (ISO 16120-1:2017)

ISO 16120-1:2017 series is applicable to wire rod of non-alloy steel intended for wire drawing and/or cold rolling. The cross-section can be circular, oval, square, rectangular, hexagonal, octagonal, half-round or another shape, generally with at least 5 mm nominal dimension, and with a smooth surface.
ISO 16120-1:2017 specifies general requirements for non-alloy steel wire rod for conversion to wire. It is not applicable to products for which standards exist or are in development, for example:
- steel wire rod intended for heat treatment;
- free-cutting steel wire rod;
- steel wire rod for cold heading and cold extrusion;
- steel wire rod intended for the production of electrodes and products for welding;
- steel wire rod for welded fabric for reinforcement for concrete;
- steel wire rod for ball and roller bearings (see ISO 683‑17);
- steel wire rod for wire for high fatigue strength mechanical springs, such as valve springs.
In addition to the requirements of this document, the general technical delivery requirements specified in ISO 404 apply.

Walzdraht aus unlegiertem Stahl zum Ziehen - Teil 1: Allgemeine Anforderungen (ISO 16120-1:2017)

1.1   Die ISO 16120 gilt für Walzdraht aus unlegiertem Stahl zum Ziehen und/oder Kaltwalzen. Der Querschnitt des Walzdrahtes ist rund, oval, vierkant, rechteckig, sechseckig, achteckig, halbrund oder von anderer Form, und sein Nennmaß beträgt im allgemeinen mindestens 5 mm; seine Oberfläche ist glatt.
1.2   Dieser Teil der ISO 16120 stellt allgemeine Anforderungen dar und gilt nicht für die folgenden Erzeugnisse, für die spezielle Normen bestehen oder in Vorbereitung sind:
   Für eine Wärmebehandlung bestimmter Walzdraht aus Stahl;
   Walzdraht aus Automatenstählen;
   Walzdraht zum Kaltstauch- und Kaltfließpressen;
   Walzdraht zur Herstellung von Elektroden und Schweißzusätzen;
   Walzdraht für geschweißte Matten und zur Betonbewehrung;
   Walzdraht für Wälzlager (siehe ISO 683-17);
   Walzdraht für die Herstellung von Draht für Federn mit hoher Dauerschwingfestigkeit, wie Ventilfedern.
1.3   Zusätzlich zu den Anforderungen nach diesem Teil der ISO 16120 gelten die in ISO 404 festgelegten allgemeinen technischen Lieferbedingungen.

Fil-machine en acier non allié destiné à la fabrication de fils - Partie 1: Exigences générales (ISO 16120-1:2017)

ISO 16120-1:2017 est applicable au fil-machine en acier non allié destiné au tréfilage et/ou au laminage à froid. La section droite du fil-machine peut être circulaire, ovale, carrée, rectangulaire, hexagonale, octogonale, demi-ronde ou autre, et en règle générale, de dimension nominale supérieure ou égale à 5 mm, et avec une surface lisse.
ISO 16120-1:2017 spécifie les exigences générales pour le Fil-machine en acier non allié destiné à la fabrication de fils. Il n'est pas applicable aux produits, pour lesquels il existe des normes spécifiques ou en cours de développement, par exemple:
- le fil-machine en acier destiné aux traitements thermiques;
- le fil-machine en acier pour décolletage;
- le fil-machine en acier pour frappe et extrusion à froid;
- le fil-machine en acier destiné à la fabrication d'électrodes et de produits pour soudage;
- le fil-machine en acier pour treillis soudés pour béton armé;
- le fil-machine en acier pour les roulements à billes et à rouleaux (voir l'ISO 683‑17);
- le fil-machine en acier pour fil à ressort à résistance élevée à la fatigue, tels que les ressorts de soupapes.
En plus des exigences de ce document, les exigences techniques générales de livraison de l'ISO 404 s'appliquent.

Valjana žica iz nelegiranega jekla - 1. del: Splošne zahteve (ISO 16120-1:2017)

Skupina standardov ISO 16120 se uporablja za valjane žice iz nelegiranega jekla, namenjene za vlečenje žice in/ali hladno valjanje. Prečni prerez je lahko okrogel, ovalen, kvadraten, pravokoten, šestkoten, osemkoten, polkrožen ali kakšne druge oblike, običajno z vsaj 5 mm nazivne mere in gladko površino.
Ta dokument določa splošne zahteve za valjane žice iz nelegiranega jekla. Ne uporablja se za izdelke, za katere so na voljo standardi, ali za izdelke, za katere se pripravljajo standardi, na primer:
– jeklene valjane žice, namenjene za toplotno obdelavo;
– valjane žice iz avtomatnega jekla;
– jeklene valjane žice za hladno preoblikovanje in hladno iztiskavanje;
– jeklene valjane žice, namenjene za izdelavo elektrod in izdelkov za varjenje;
– jeklene valjane žice za armaturne mreže za armiranje betona;
– jeklene valjane žice za kroglične in kotalne ležaje (glej standard ISO 683-17);
– jeklene valjane žice za mehanske vzmeti z visoko natezno trdnostjo, kot so ventilne vzmeti.
Poleg zahtev tega dokumenta se uporabljajo tudi zahteve splošnih dobavnih pogojev, podanih v standardu ISO 404.

General Information

Status
Published
Publication Date
06-Jun-2017
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
07-Jun-2017
Completion Date
07-Jun-2017

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SLOVENSKI STANDARD
SIST EN ISO 16120-1:2017
01-september-2017
1DGRPHãþD
SIST EN ISO 16120-1:2011
Valjana žica iz nelegiranega jekla - 1. del: Splošne zahteve (ISO 16120-1:2017)

Non-alloy steel wire rod for conversion to wire - Part 1: General requirements (ISO 16120

-1:2017)

Walzdraht aus unlegiertem Stahl zum Ziehen - Teil 1: Allgemeine Anforderungen (ISO

16120-1:2017)

Fil-machine en acier non allié destiné à la fabrication de fils - Partie 1: Exigences

générales (ISO 16120-1:2017)
Ta slovenski standard je istoveten z: EN ISO 16120-1:2017
ICS:
77.140.65 Jeklene žice, jeklene vrvi in Steel wire, wire ropes and
verige link chains
SIST EN ISO 16120-1:2017 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 16120-1:2017
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SIST EN ISO 16120-1:2017
EN ISO 16120-1
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2017
EUROPÄISCHE NORM
ICS 77.140.60 Supersedes EN ISO 16120-1:2011
English Version
Non-alloy steel wire rod for conversion to wire - Part 1:
General requirements (ISO 16120-1:2017)

Fil-machine en acier non allié destiné à la fabrication Walzdraht aus unlegiertem Stahl zum Ziehen - Teil 1:

de fils - Partie 1: Exigences générales (ISO 16120- Allgemeine Anforderungen (ISO 16120-1:2017)

1:2017)
This European Standard was approved by CEN on 20 April 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16120-1:2017 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 16120-1:2017
EN ISO 16120-1:2017 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 16120-1:2017
EN ISO 16120-1:2017 (E)
European foreword

This document (EN ISO 16120-1:2017) has been prepared by Technical Committee ISO/TC 17 “Steel” in

collaboration with Technical Committee ECISS/TC 106 “Wire rod and wires” the secretariat of which is

held by AFNOR.

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 December 2017, and conflicting national standards

shall be withdrawn at the latest by December 2017.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent

rights.
This document supersedes EN ISO 16120-1:2011.

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, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 16120-1:2017 has been approved by CEN as EN ISO 16120-1:2017 without any

modification.
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SIST EN ISO 16120-1:2017
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SIST EN ISO 16120-1:2017
INTERNATIONAL ISO
STANDARD 16120-1
Third edition
2017-05
Non-alloy steel wire rod for
conversion to wire —
Part 1:
General requirements
Fil-machine en acier non allié destiné à la fabrication de fils —
Partie 1: Exigences générales
Reference number
ISO 16120-1:2017(E)
ISO 2017
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SIST EN ISO 16120-1:2017
ISO 16120-1:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland

All rights reserved. Unless otherwise specified, 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
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
---------------------- Page: 8 ----------------------
SIST EN ISO 16120-1:2017
ISO 16120-1:2017(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 2

4 Classification ............................................................................................................................................................................................................ 3

5 Ordering information to be supplied by the purchaser............................................................................................... 3

6 Production process ............................................................................................................................................................................................ 4

7 Requirements .......................................................................................................................................................................................................... 4

7.1 General ........................................................................................................................................................................................................... 4

7.2 Quality system ......................................................................................................................................................................................... 4

7.3 Method of delivery ............................................................................................................................................................................... 4

7.4 Delivery condition ................................................................................................................................................................................ 5

8 Dimensions, mass and tolerances ...................................................................................................................................................... 5

9 Inspection .................................................................................................................................................................................................................... 5

9.1 Inspection and inspection documents ................................................................................................................................ 5

9.2 Extension of inspection ................................................................................................................................................................... 5

9.3 Acceptance unit, number of samples and test pieces ............................................................................................ 5

9.4 Sampling and preparation of samples and test pieces ......................................................................................... 6

9.4.1 Chemical composition ................................................................................................................................................. 6

9.4.2 Tensile strength ................................................................................................................................................................ 6

9.4.3 Decarburization, surface discontinuities, non-metallic inclusions, core

segregation and microstructure ......................................................................................................................... 6

9.5 Test methods ............................................................................................................................................................................................. 6

9.5.1 Chemical composition ................................................................................................................................................. 6

9.5.2 Tensile strength ................................................................................................................................................................ 6

9.5.3 Surface discontinuities ............................................................................................................................................... 6

9.5.4 Decarburization ................................................................................................................................................................ 7

9.5.5 Non-metallic inclusions ............................................................................................................................................. 7

9.5.6 Core segregation .............................................................................................................................................................. 7

9.5.7 Microstructure ................................................................................................................................................................... 7

9.5.8 Determination of cementite network in high-carbon steel wire rod .................. ................ 7

9.6 Retest ............................................................................................................................................................................................................... 7

10 Marking .......................................................................................................................................................................................................................... 7

11 Disputes ......................................................................................................................................................................................................................... 7

Annex A (normative) Determination of core segregation .............................................................................................................. 8

Annex B (informative) Measurement of surface discontinuities .........................................................................................11

Annex C (informative) Mechanical damage ................................................................................................................................................14

Annex D (normative) Determination of percentage of resolvable pearlite in high-carbon

steel wire rod ........................................................................................................................................................................................................18

Annex E (normative) Determination of cementite network in high-carbon steel wire rod .....................22

Bibliography .............................................................................................................................................................................................................................27

© ISO 2017 – All rights reserved iii
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SIST EN ISO 16120-1:2017
ISO 16120-1:2017(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.

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 on 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 the following

URL: w w w . i s o .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 third edition cancels and replaces the second edition (ISO 16120-1:2011), which has been

technically revised.
The main changes compared to the previous edition are:

— core segregation, surface discontinuity and mechanical damage have been added to the terms and

definitions;

— determination of cementite network in high-carbon steel wire rod (9.5.8 and Annex E) added.

A list of all parts in the ISO 16120 series can be found on the ISO website.
iv © ISO 2017 – All rights reserved
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SIST EN ISO 16120-1:2017
INTERNATIONAL STANDARD ISO 16120-1:2017(E)
Non-alloy steel wire rod for conversion to wire —
Part 1:
General requirements
1 Scope

The ISO 16120 series is applicable to wire rod of non-alloy steel intended for wire drawing and/or cold

rolling. The cross-section can be circular, oval, square, rectangular, hexagonal, octagonal, half-round or

another shape, generally with at least 5 mm nominal dimension, and with a smooth surface.

This document specifies general requirements for non-alloy steel wire rod for conversion to wire. It is

not applicable to products for which standards exist or are in development, for example:

— steel wire rod intended for heat treatment;
— free-cutting steel wire rod;
— steel wire rod for cold heading and cold extrusion;

— steel wire rod intended for the production of electrodes and products for welding;

— steel wire rod for welded fabric for reinforcement for concrete;
— steel wire rod for ball and roller bearings (see ISO 683-17);

— steel wire rod for wire for high fatigue strength mechanical springs, such as valve springs.

In addition to the requirements of this document, the general technical delivery requirements specified

in ISO 404 apply.
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 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing

ISO 404:2013, Steel and steel products — General technical delivery requirements
ISO 3887, Steels — Determination of depth of decarburization
ISO 4885, Ferrous products — Heat treatments — Vocabulary

ISO 4948-1, Steels — Classification — Part 1: Classification of steels into unalloyed and alloy steels based

on chemical composition

ISO 4948-2, Steels — Classification — Part 2: Classification of unalloyed and alloy steels according to main

quality classes and main property or application characteristics

ISO 6892-1, Metallic materials — Tensile testing — Part 1: Method of test at room temperature

ISO 6929, Steel products — Vocabulary
ISO/TR 9769, Steel and iron — Review of available methods of analysis
© ISO 2017 – All rights reserved 1
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SIST EN ISO 16120-1:2017
ISO 16120-1:2017(E)
ISO 10474, Steel and steel products — Inspection documents

ISO 14284, Steel and iron — Sampling and preparation of samples for the determination of chemical

composition

ISO 16120-2:2017, Non-alloy steel wire rod for conversion to wire — Part 2: Specific requirements for

general-purpose wire rod

ISO 16120-3:2011, Non-alloy steel wire rod for conversion to wire — Part 3: Specific requirements for

rimmed and rimmed substitute, low-carbon steel wire rod

ISO 16120-4:2017, Non-alloy steel wire rod for conversion to wire — Part 4: Specific requirements for wire

rod for special applications
ISO 16124, Steel wire rod — Dimensions and tolerances
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 377, ISO 404, ISO 4885,

ISO 4948-1, ISO 4948-2 and ISO 6929 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at http:// www .iso .org/ obp
3.1
rod
hot-rolled finished product hot-wound into irregular coils

Note 1 to entry: Rod used for wire-drawing purposes in coil form is generally termed wire rod.

3.2
heat analysis

chemical analysis representative of the heat, by a method determined at the steelmaker’s discretion

[SOURCE: ISO 404:2013, 3.11, modified.]
3.3
product analysis

chemical analysis carried out on a sample of the product taken after the final hot rolling operation

[SOURCE: ISO 404:2013, 3.12, modified.]
3.4
resolvable pearlite

two-phased structure in which ferrite and iron carbide lamellae can be clearly observed under optical

microscopy in certain conditions
3.5
core segregation

local variation in chemical composition that is noticeable over a cross-section of wire rod (3.1) by

macrographic examination and that concerns primarily the segregation resulting from a solidification

process in continuous casting

Note 1 to entry: It is for this reason that an examination, specifically for carbon core segregation, will reveal the

presence of segregation.

Note 2 to entry: A different technique is used to assess grain boundary cementite (which may be detrimental to

further processing), the formation of which is related to carbon segregation and the cooling rate after wire rod

rolling. However, grain boundary cementite should not be confused with core segregation.

2 © ISO 2017 – All rights reserved
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SIST EN ISO 16120-1:2017
ISO 16120-1:2017(E)
3.6
surface discontinuity

measurable discontinuity in the surface of the wire rod (3.1), introduced at some point during the

manufacturing process
3.7
mechanical damage

discernible contact which the wire rod (3.1) encounters after the rolling and coiling operation, i.e.

during subsequent handling of the coil, and which marks the surface

Note 1 to entry: The contact can be introduced by abrasion or impact and can occur between coils or between the

coil and any other material capable of inducing damage (concrete, steel or other materials).

Note 2 to entry: See Annex C.
4 Classification

The classification of the steel grades covered by this document is indicated in ISO 16120-2, ISO 16120-3

and ISO 16120-4 for the corresponding steel grades.
5 Ordering information to be supplied by the purchaser

The following information shall be supplied by the purchaser at the time of enquiry and order, to enable

the supplier to comply satisfactorily with the requirements of the ISO 16120 series:

a) quantity to be delivered;

b) cross-section and product type (e.g. round wire rod, square wire rod, hexagonal wire rod, etc.);

c) nominal dimensions of the wire rod and tolerance class in accordance with ISO 16124 (if another

tolerance class such as T1 is required);
d) reference to the relevant part of ISO 16120, i.e. ISO 16120-2;

e) steel grade, including any variations, and/or the addition of other elements, as permitted by

ISO 16120-2 and ISO 16120-4;

(For steels according to ISO 16120-2 and ISO 16120-4, wire rod can also be ordered by the mean

tensile strength; see ISO 16120-2:2017, Clause 3 and 4.6 and ISO 16120-4:2017, Clause 3 and 4.8.

When ordering to tensile strength, it is necessary also to indicate the required tolerances on tensile

strength ranges — Option A or Option B.)

f) type of inspection and inspection document in accordance with ISO 10474 (or in accordance with

other regional standards, e.g. EN 10204);
g) surface condition (where different from the as-rolled condition);
h) dimensions and mass of coils;

i) where applicable, indication of the type of descaling (chemical cleaning or mechanical);

j) where applicable, the amount of microalloying elements (see ISO 16120-2 and ISO 16120-4);

k) where applicable, class B for the depth of decarburization (see ISO 16120-4);
NOTE If nothing is mentioned in the order, class A will be delivered;
l) where applicable, the microstructure (see ISO 16120-4:2017, 4.11);
m) where applicable, suitability for galvanizing;
n) where applicable, suitability for direct drawing;
© ISO 2017 – All rights reserved 3
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SIST EN ISO 16120-1:2017
ISO 16120-1:2017(E)
o) where applicable, the quality system (see 7.2);
p) where applicable, the method of binding and labelling.

Items g) to p) are options. If the purchaser does not indicate a wish to implement any of these options,

the supplier shall supply the product in accordance with the basic specifications of items a) to f).

Examples 1 and 2 provide two ordering examples.

EXAMPLE 1 For grades ordered according to chemical composition, 100 tonnes of round wire rod, nominal

diameter of 12 mm with dimensional tolerances according to ISO 16124, class T1, steel grades ISO 16120-2 –

C52D in the as-rolled condition with an inspection document 3.1 according to ISO 10474.

100 t round wire rod ISO 16124-12,0T1
ISO 16120-2 – C52D
ISO 10474 inspection document 3.1

EXAMPLE 2 For grades ordered according to tensile strength, 200 tonnes of round wire rod, nominal diameter

of 5,5 mm with dimensional tolerances according to ISO 16124, class T1, steel grades ISO 16120-4 – C##D2 with

tensile strength 1 020 MPa, tensile strength tolerance Option A, in the as-rolled condition with an inspection

document 3.1 according to ISO 10474.
200 t round wire rod ISO 16124-5, 5T1
ISO 16120-4 – C##D2–1020A
ISO 10474 inspection document 3.1

NOTE The symbol “##” means “to be left blank” since the carbon content is at the discretion of the supplying

mill, and the supplying mill indicates the exact number of ## based on the grade designation until shipment.

See ISO 16120-2:2017, Table 1 and ISO 16120-4:2017, Table 1, respectively, for the grade designation.

6 Production process

At the request of the purchaser at the time of enquiry and ordering, the steel making and manufacturing

process shall be made known to the purchaser. Those processes that are specifically agreed upon shall

not be changed without the prior agreement of the purchaser.
7 Requirements
7.1 General

Suppliers are responsible, using the means they think fit, for inspecting their product in accordance

with various quality criteria specified. In view of the practical difficulties in inspecting a coil of wire

rod along its entire length, it cannot be proved that no value greater than the specified limits is to be

found in the coil as a whole. Statistical evaluation of performances applicable to all coils may be agreed

between the purchaser and the manufacturer at the time of ordering.
7.2 Quality system

If agreed between the supplier and purchaser at the time of enquiry and order, the wire rod supplied

shall be produced under a mutually acceptable quality system.
7.3 Method of delivery

Wire rod shall be delivered by heat or part of a heat. Unless otherwise specified, the number of heats

per delivery should be minimized as far as possible.
4 © ISO 2017 – All rights reserved
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SIST EN ISO 16120-1:2017
ISO 16120-1:2017(E)
7.4 Delivery condition

Wire rod shall be supplied in the as-rolled state, in coils of one continuous length with non-aligned

turns, but capable of being unwound in a regular manner during subsequent processing.

The coils shall be cut back at both ends to provide a product of uniform shape and properties.

8 Dimensions, mass and tolerances

The dimensions, mass and tolerances of the wire rod shall be in accordance with the requirements of

ISO 16124.
9 Inspection
9.1 Inspection and inspection documents

Inspection and inspection documents shall be in accordance with ISO 404 and ISO 10474.

9.2 Extension of inspection

If the order is accompanied by a request for an inspection certificate or an inspection report, the

inspection shall be carried out in accordance with Table 1. If the order requires an inspection document

3.1 or 3.2, the purchaser shall supply to the manufacturer the name and address of the organization or

person nominated to carry out the inspection.
Table 1 — Extension of inspection
Rimmed and
General-purpose Wire rod for
rimmed substitute,
wire rod special applications
Subject of test
low-carbon wire rod
(ISO 16120-2) (ISO 16120-4)
(ISO 16120-3)
Surface discontinuities 0 0 0
Decarburization — — 0
Non-metallic inclusions — 0 0
Core segregation 0 — 0
Product analysis 0 0 0
Tensile strength 0 0 0
Microstructure — — 0
See Annex D.
— is not carried out.
0 is carried out only if part of the options agreed at the time of ordering.
9.3 Acceptance unit, number of samples and test pieces

Unless otherwise agreed, the acceptance unit is composed of wire rod of the same cross-sectional

dimension, originating from the same heat, and rolled in the same continuous lot.

If specific inspection is required, the number of samples and test pieces given in Table 2 shall apply.

For wire rod for special applications, a higher frequency of sampling may be agreed. If non-specific

inspection is required, the performance statistics or suitable data may be used.
© ISO 2017 – All rights reserved 5
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SIST EN ISO 16120-1:2017
ISO 16120-1:2017(E)
Table 2 — Acceptance unit, number of samples and test pieces
Type of requirement Number of samples and test pieces
Product analysis Three, from three different coils originating from
the same heat, but not necessarily rolled in the same
continuous lot
Permissible depth of surface discontinuities
Permissible depth of decarburization
One per 20 t with a minimum of three and a maximum
Non-metallic inclusions
of five per acceptance unit
Tensile strength
Microstructure
Core segregation 10
Cementite network At least 10 samples

Another number of samples to be examined may be agreed upon between the supplier and purchaser at the time of

ordering, depending upon the process capability.

The number of samples to be examined may be agreed upon between the supplier and the purchaser, w

...

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