EN 10263-4:2001

SLOVENSKI STANDARD
01-september-2002
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Steel rod, bars and wire for cold heading and cold extrusion - Part 4: Technical delivery
conditions for steels for quenching and tempering
Walzdraht, Stäbe und Draht aus Kaltstauch- und Kaltfließpressstählen - Teil 4:
Technische Lieferbedingungen für Vergütungsstähle
Barres, fil machine et fils en acier pour transformation a froid et extrusion a froid - Partie
4: Conditions techniques de livraison des aciers pour trempe et revenu
Ta slovenski standard je istoveten z: EN 10263-4:2001
ICS:
77.140.60 Jeklene palice in drogovi Steel bars and rods
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 10263-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2001
ICS 77.140.60; 77.140.65
English version
Steel rod, bars and wire for cold heading and cold extrusion -
Part 4: Technical delivery conditions for steels for quenching and
tempering
Barres, fil machine et fils en acier pour transformation à Walzdraht, Stäbe und Draht aus Kaltstauch- und
froid et extrusion à froid - Partie 4: Conditions techniques Kaltfließpreßstählen - Teil 4: Technische Lieferbedingungen
de livraison des aciers pour trempe et revenu für Vergütungsstähle
This European Standard was approved by CEN on 19 April 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 10263-4:2001 E
worldwide for CEN national Members.

Page 2
CONTENTS
Page
FOREWORD. 3
1 Scope . 4
2 Normative references. 4
3 Terms and definitions. 4
4 Classification and designation . 4
4.1 Classification . 4
4.2 Designation . 4
5 Production Process . 4
5.1 Steelmaking process. 4
5.2 Deoxidation . 4
6 Requirements . 5
6.1 Delivery conditions . 5
6.2 Chemical composition . 5
6.3 Mechanical properties . 5
6.4 Hardenability . 5
6.5 Surface requirements. 5
6.6 Supplementary or special requirements. 5

Page 3
FOREWORD
This European Standard has been prepared by Technical Committee ECISS/TC 15 "Wire-
rod - Qualities, dimensions, tolerances and specific tests", the secretariat of which is held by
UNI.
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 2001, and
conflicting national standards shall be withdrawn at the latest by December 2001.
This European Standard EN 10263 is subdivided as follows:
- Part 1: General technical delivery conditions;
- Part 2: Technical delivery conditions for steels not intended for heat treatment after cold
working;
- Part 3: Technical delivery conditions for case hardening steels;
- Part 4: Technical delivery conditions for steels for quenching and tempering
- Part 5: Technical delivery conditions for stainless steels.
According to the CEN/CENELEC Internal Regulations, the national standards organizations
of the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United
Kingdom.
Page 4
1 Scope
1.1 This Part of EN 10263 is applicable to round rod and round bars and wire with a
diameter up to and including 100 mm, of non-alloy and alloy steel, intended for cold heading
and cold extrusion and subsequent quenching and tempering
1.2 This Part of EN 10263 is complemented by EN 10263-1.
2 Normative references
This European Standard incorporates by date or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and
the publications are listed hereafter. For date references, subsequent amendments to or
revisions of, any of these publications apply to this European Standard only when
incorporated in it by amendment or revision. For undated references the latest edition of the
publication referred to applies (including amendments).
EN 10020 Definitions and classification of grades of steel.
EN 10263-1 Steel rod, bars and wire for cold heading and cold extrusion - Part 1:
General technical delivery conditions
3 Terms and definitions
For the purposes of this standard the definitions in EN 10263-1 and the following apply.
3.1
Quenched and tempered steels
For the purpose of this European Standard quenched and tempered steels are engineering
steels which, because of their chemical composition are suitable for hardening and in the
quenched and tempered condition have good toughness at a given tensile strength
4 Classification and designation
4.1 Classification
All steels covered by this Part of EN 10263 are special steels according to EN 10020.
Steel grades from C35EC to C45RC as quoted in table 2 are non-alloy steels and all others
are alloy steels according to EN 10020.
4.2 Designation
See EN 10263-1:2001.
5 Production Process
5.1 Steelmaking process
See EN 10263-1:2001
5.2 Deoxidation
All steels shall be killed with aluminium and/or silicon. Aluminium and/or silicon may be
replaced by another element having a similar effect.

Page 5
6 Requirements
6.1 Delivery conditions
The delivery conditions in which the products covered by this Part of EN 10263 are normally
supplied, the product forms and the applicable requirements are given in table 1.
6.2 Chemical composition
6.2.1 Heat analysis
The chemical composition for the heat analysis shall be in accordance with the values
specified in table 2 and table 3.
6.2.2 Product analysis
In cases where a product analysis is requested, the admissible deviations from the values
specified for the cast/heat analysis are indicated in table 4.
6.3 Mechanical properties
The mechanical properties of the products, to be determined by the tensile test, shall be in
accordance with the prescriptions given in table 1, for that which concerns the delivery
condition, and in tables 5 and 6.
6.4 Hardenability
6.4.1 In the case of products ordered with standard requirements regarding hardenability,
that is, when the steel names or numbers as quoted in tables 2 and 3 are supplemented by
the symbol “+H”, the hardness values obtained in the end quench test (Jominy test) (see
table 1 of EN 10263-1:2001) shall be in compliance with the values given in tables 7 and 9.
6.4.2 In the case of products ordered with restricted requirements regarding the scatter
bands of the hardness values obtained by the Jominy test, that is when the steel name or
number as quoted in table 2 is supplemented by the symbol “+HH” or “+HL”, the above
hardness values shall be in compliance with the values given in table 8.
NOTE 1 The symbol “+HH” denotes that the upper limit of the scatter band
coincides with the upper limit for the corresponding steel “+H”.
NOTE 2 The symbol “+HL” denotes that the lower limit of the scatter band
coincides with the lower limit for the corresponding steel “+H”.
NOTE 3 See EN 10263-1:2001, 7.7.4
6.4.3 The austenitizing temperatures for the Jominy test are given in tables 7, 8 and 9
6.4.4 Core hardening
In the case of products ordered with requirements regarding core hardening, that is, when
the steel name or number, as quoted in tables 2 and 3 is supplemented by the symbol
“+CH” the core hardening temperature, the hardness values and the corresponding
maximum diameters shall be in compliance with the values given in table 10.
6.5 Surface requirements
For any particular surface requirement to be agreed at the time of ordering see EN 10263-
1:2001, 7.10.
6.6 Supplementary or special requirements
Other requirements that can be agreed at the time of enquiry and order are described in EN
10263-1:2001, Annex B.
Page 6
Table 1 - Summary of delivery conditions, product forms and applicable requirements
products form
Applicable requirements in cases where the steel concerned has been ordered
(a)
with reference to the steel names indicated in
Delivery
Symbols
condition
table
rod bar wire
table 2 or 3 or 5 or 6 table 7 or 8 or 9 table 10 2,4,5,6,7,8 9 or
as hot rolled XX

+U or +U+PE
or peeled
+U+C
+cold drawn XX


Minimum Supplementary
Untreated Chemical Chemical
Chemical
+cold drawn
+U+C+AC

XX
Mechanical Mechanical Mechanical core
or
+spheroidized composition composition
Values for
composition
hardness
+cold drawn
properties properties properties special
as specified as specified
Hardenability
+spheroidized +U+C+AC+LC XX

as specified and requirements
as specified as as
+skin passed
in in
according
in
specified specified maximum as specified
+AC in
as treated XX


tables to tables
tables in in diameter in
table
2 or 3 tables 2 or 3
+AC+PE
+peeled XX

2 or 3 table table according Annex B
5 or 6
and 7 or 8 or 9 and
to table
and 5 or 6 5 or 6 Of
+AC+C
+cold drawn XX


Spheroidized 4
4 4
10 EN 10263-1:2001(b)
+cold drawn
+AC+C+AC

XX
+spheroidized
+cold drawn
+AC+C+AC+LC
+spheroidized
XX
+skin passed
other Other delivery conditions can be agreed at the time of ordering
(a) X = applicable

= not applicable
(b) If agreed at the time of ordering

Page 7
a) b)
Table 2 - Steel grades and chemical composition for steel grades WITHOUT BORON.  Heat analysis, % by mass.
Steel grade P
Si Cu
c)
Steel Steel C Mn max SCr Mo Ni
d)
max max
name number
C35EC 1.1172 0,32/0,39 0,30 0,50/0,80 0,025 0,025 max 0,25
C35RC 1.1060 0.32/0,39 0,30 0,50/0,80 0,025 0.020/0,035 0,25
C45EC 1.1192 0,42/0,50 0,30 0,50/0,80 0,025 0,025 max 0,25
C45RC 1.1061 0,42/0,50 0,30 0,50/0,80 0,025 0.020/0,035 0,25
37Mo2 1.5418 0,35/0,40 0,30 0,60/0,90 0,025 0,025 max 0,20/0,30 0,25
38Cr2 1.7003 0,35/0,42 0,30 0,50/0,80 0,025 0,025 max 0,40/0,60 0,25
46Cr2 1.7006 0,42/0,50 0,30 0,50/0,80 0,025 0,025 max 0,40/0,60 0,25
34Cr4 1.7033 0,30/0,37 0,30 0,60/0,90 0,025 0,025 max 0,90/1,20 0,25
37Cr4 1.7034 0,34/0,41 0,30 0,60/0,90 0,025 0,025 max 0,90/1,20 0,25
41Cr4 1.7035 0,38/0,45 0,30 0,60/0,90 0,025 0,025 max 0,90/1,20 0,25
41CrS4 1.7039 0,38/0,45 0,30 0,60/0,90 0,025 0.020/0,040 0,90/1,20 0,25
25CrMo4 1.7218 0,22/0,29 0,30 0,60/0,90 0,025 0,025 max 0,90/1,20 0,15/0,30 0,25
25CrMoS4 1.7213 0,22/0,29 0,30 0,60/0,90 0,025 0.020/0,040 0,90/1,20 0,15/0,30 0,25
34CrMo4 1.7220 0,30/0,37 0,30 0,60/0,90 0,025 0,025 max 0,90/1,20 0,15/0,30 0,25
37CrMo4 1.7202 0,35/0,40 0,30 0,60/0,90 0,025 0,025 max 0,90/1,20 0,15/0,30 0,25
42CrMo4 1.7225 0,38/0,45 0,30 0,60/0,90 0,025 0,025 max 0,90/1,20 0,15/0,30 0,25
42CrMoS4 1.7227 0,38/0,45 0,30 0,60/0,90 0,025 0.020/0,040 0,90/1,20 0,15/0,30 0,25
34CrNiMo6 1.6582 0,30/0,38 0,30 0,50/0,80 0,025 0,025 max 1,30/1,70 0,15/0,30 1,30/1,70 0,25
41NiCrMo7-3-2 1.6563 0.38/0,44 0,30 0,60/0,90 0,025 0,025 max 0,70/0,90 0,15/0,30 1,65/2,00 0,25
a) Elements not quoted in this table should not be intentionally added to the steel without the agreement of the purchaser, except those intended for finishing the heat.
All reasonable precaution shall be taken in order to prevent the addition of elements from scrap or other material used in the production process. However, residual
elements may be present provided that they do not affect the hardenability, mechanical properties and applicability.
b) In the case of steels with hardenability requirements (see tables 7 to 9) minor deviation from the specified limits are permitted (with the exception of sulphur and
phosphorus), provided that they do not exceed 0,01 % for carbon and the values indicated in table 4 for the other elements.
c) A carbon range of 0,04% (e.g. 0,33 - 0,37 %) may be agreed at the time of
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