EN ISO 16120-1:2011

SLOVENSKI STANDARD
01-oktober-2011
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SIST EN 10016-1:1997
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Non-alloy steel wire rod for conversion to wire - Part 1: General requirements (ISO 16120
-1:2011)
Walzdraht aus unlegiertem Stahl zum Ziehen - Teil 1: Allgemeine Anforderungen (ISO
16120-1:2011)
Fil-machine en acier non allié destiné à la fabrication de fils - Partie 1: Exigences
générales (ISO 16120-1:2011)
Ta slovenski standard je istoveten z: EN ISO 16120-1:2011
ICS:
77.140.65 Jeklene žice, jeklene vrvi in Steel wire, wire ropes and
verige link chains
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 16120-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2011
ICS 77.140.60 Supersedes EN 10016-1:1994
English Version
Non-alloy steel wire rod for conversion to wire - Part 1: General
requirements (ISO 16120-1:2011)
Fil-machine en acier non allié destiné à la fabrication de fils Walzdraht aus unlegiertem Stahl zum Ziehen - Teil 1:
- Partie 1: Exigences générales (ISO 16120-1:2011) Allgemeine Anforderungen (ISO 16120-1:2011)
This European Standard was approved by CEN on 30 June 2011.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16120-1:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 16120-1:2011) 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 January 2012, and conflicting national standards shall be withdrawn at
the latest by January 2012.
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 10016-1:1994.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 16120-1:2011 has been approved by CEN as a EN ISO 16120-1:2011 without any
modification.
INTERNATIONAL ISO
STANDARD 16120-1
Second edition
2011-07-01
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 16120-1:2011(E)
©
ISO 2011
ISO 16120-1:2011(E)
©  ISO 2011
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2011 – All rights reserved

ISO 16120-1:2011(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Classification .2
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 .4
8 Dimensions, mass and tolerances .4
9 Inspection.4
9.1 Inspection and inspection documents.4
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
9.5 Test methods .6
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) Determining the percentage of resolvable pearlite.19
Bibliography.21

ISO 16120-1:2011(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 16120-1 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 16120-1:2001), which has been technically
revised.
ISO 16120 consists of the following parts, under the general title Non-alloy steel wire rod for conversion to
wire:
⎯ Part 1: General requirements
⎯ Part 2: Specific requirements for general-purpose wire rod
⎯ Part 3: Specific requirements for rimmed and rimmed substitute, low-carbon steel wire rod
⎯ Part 4: Specific requirements for wire rod for special applications

iv © ISO 2011 – All rights reserved

INTERNATIONAL STANDARD ISO 16120-1:2011(E)

Non-alloy steel wire rod for conversion to wire —
Part 1:
General requirements
1 Scope
1.1 ISO 16120 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.
1.2 This part of ISO 16120 covers general requirements and 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.
1.3 In addition to the requirements of this part of ISO 16120, the general technical delivery requirements
specified in ISO 404 apply.
2 Normative references
The following referenced documents are indispensable for the application 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 404:1992, 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 16120-1:2011(E)
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 — Definitions and classification
ISO/TR 9769, Steel and iron — Review of available methods of analysis
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 16120-2:2011, 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 16120-4:2011, 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.
3.1
rod
hot-rolled finished product hot-wound into irregular coils
NOTE 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
NOTE Adapted from ISO 404:1992.
3.3
product analysis
chemical analysis carried out on a sample of the product taken after the final hot rolling operation
NOTE Adapted from ISO 404:1992.
3.4
resolvable pearlite
two-phased structure in which ferrite and iron carbide lamellae can be clearly observed under optical
microscopy in certain conditions
4 Classification
The classification of the steel grades covered by this part of ISO 16120 is indicated in ISO 16120-2,
ISO 16120-3 and ISO 16120-4 for the corresponding steel grades.
2 © ISO 2011 – All rights reserved

ISO 16120-1:2011(E)
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 ISO 16120:
a) quantity to be delivered;
b) cross-section and product type (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 in 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 Clause 3 and 4.6 of ISO 16120-2:2011 and Clause 3 and 4.8 of
ISO 16120-4:2011;
f) the type of inspection and inspection document in accordance with ISO 10474 (or in accordance with
other regional standards, e.g. EN 10204, see the Bibliography);
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); if nothing is mentioned in
the order, class A will be delivered;
l) where applicable, the microstructure (see ISO 16120-4:2011, 4.11);
m) where applicable, suitability for galvanizing;
n) where applicable, suitability for direct drawing;
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).
The following are 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.B according to ISO 10474
100 t round wire rod ISO 16124-12,0T1
ISO 16120-2 – C52D
ISO 10474 inspection document 3.1.B
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 1020 MPa in the as-rolled condition with an inspection document 3.1.B according to ISO 10474.
ISO 16120-1:2011(E)
200 t round wire rod ISO 16124-5,5T1
ISO 16120-4 – C##D2-1020
ISO 10474 inspection document 3.1.B
NOTE ## 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 Table 1 of ISO 16120-2:2011
and ISO 16120-4:2011, 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.
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 Di
...