Copper and copper alloys - Hollow rod for free machining purposes

This document specifies the composition, property requirements and dimensional tolerances for copper alloy hollow rod, finally produced by drawing or extruding, specifically intended for free machining purposes.
NOTE   Hollow products having an outside diameter greater than 80 mm and/or a wall thickness less than 2 mm are most frequently specified in EN 12449.
The sampling procedures, the methods of test for verification of conformity to the requirements of this document, are also specified.

Kupfer und Kupferlegierungen - Hohlstangen für die spanende Bearbeitung

Dieses Dokument legt die Zusammensetzung, die Anforderungen an die Eigenschaften und die Grenzabmaße für durch Ziehen oder Pressen endgefertigte Hohlstangen aus Kupferlegierungen für die spanende Bearbeitung fest.
ANMERKUNG   Viele Hohlstangen mit einem Außendurchmesser über 80 mm und/oder einer Wanddicke unter 2 mm sind in EN 12449 festgelegt.
Der Ablauf der Probenahme und die Prüfverfahren zur Feststellung der Übereinstimmung mit den Anforderungen dieses Dokuments sind ebenfalls festgelegt.

Cuivre et alliages de cuivre - Barres creuses pour décolletage

Le présent document spécifie la composition, les exigences de propriétés et les tolérances dimensionnelles des barres creuses en alliage de cuivre, fabriquées par étirage ou filage, spécifiquement destinées au décolletage.
NOTE   Les produits creux de diamètre extérieur supérieur à 80 mm et/ou ayant une épaisseur de paroi inférieure à 2 mm sont le plus souvent spécifiés conformément à l’EN 12449.
Les modes opératoires d’échantillonnage et les méthodes d’essai pour la vérification de la conformité aux exigences du présent document sont également spécifiés.

Baker in bakrove zlitine - Votle palice za obdelavo z odrezovanjem na avtomatih

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oSIST prEN 12168:2022
Baker in bakrove zlitine - Votle palice za obdelavo z odrezovanjem na avtomatih
Copper and copper alloys - Hollow rod for free machining purposes
Kupfer und Kupferlegierungen - Hohlstangen für die spanende Bearbeitung
Cuivre et alliages de cuivre - Barres creuses pour décolletage
Ta slovenski standard je istoveten z: prEN 12168
77.150.30 Bakreni izdelki Copper products
oSIST prEN 12168:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 12168:2022
oSIST prEN 12168:2022
prEN 12168
August 2022
ICS 77.150.30 Will supersede EN 12168:2016
English Version
Copper and copper alloys - Hollow rod for free machining
Cuivre et alliages de cuivre ¿ Barres creuses pour Kupfer und Kupferlegierungen - Hohlstangen für die
décolletage spanende Bearbeitung
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 133.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.



CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12168:2022 E
worldwide for CEN national Members.

oSIST prEN 12168:2022
prEN 12168:2022 (E)
Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Designations. 9
4.1 Material . 9
4.1.1 General . 9
4.1.2 Symbol . 9
4.1.3 Number . 9
4.2 Material condition . 9
4.3 Product . 10
5 Ordering information . 13
6 Requirements . 14
6.1 Composition . 14
6.2 Mechanical properties . 14
6.3 Resistance to dezincification . 14
6.4 Residual stress level . 15
6.5 Dimensions and tolerances . 15
6.5.1 Diameter or width across-flats . 15
6.5.2 Tolerance on wall thickness . 15
6.5.3 Eccentricity . 15
6.5.4 Shape tolerances . 15
6.5.5 Straightness . 15
6.5.6 Length . 16
6.5.7 Corner radii . 16
6.5.8 Twist of polygonal hollow rod . 16
6.6 Surface quality. 17
6.7 Internal inclusion . 17
7 Sampling . 17
7.1 General . 17
7.2 Analysis . 17
7.3 Mechanical tests . 18
7.4 Dezincification resistance and stress corrosion resistance tests . 18
8 Test methods . 18
8.1 Analysis . 18
8.2 Tensile test . 18
8.2.1 General . 18
8.2.2 Location of test pieces . 18
8.2.3 Shape and size of test pieces . 19
8.2.4 Procedure for testing . 19
8.2.5 Determination of results . 19
oSIST prEN 12168:2022
prEN 12168:2022 (E)
8.3 Hardness test . 19
8.4 Dezincification resistance test . 19
8.5 Stress corrosion resistance test . 19
8.6 Retests . 19
8.6.1 Analysis, tensile, hardness and dezincification resistance tests . 19
8.6.2 Stress corrosion resistance test . 20
8.7 Rounding of results . 20
9 Declaration of conformity and inspection documentation . 20
9.1 Declaration of conformity . 20
9.2 Inspection documentation . 20
10 Marking, packaging, labelling . 21
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU (Pressure equipment Directive) aimed to be
covered . 37
Bibliography . 38

oSIST prEN 12168:2022
prEN 12168:2022 (E)
European foreword
This document (prEN 12168:2022) has been prepared by Technical Committee CEN/TC 133 “Copper and
copper alloys”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12168:2016.
In comparison with EN 12168:2016, the following significant technical changes were made:
a) Modified the note in Clause 1;
b) Introduction in 6.6 of eddy current test parameters;
c) Introduction of 6.7 Internal inclusion;
d) Modified the definition of diameter or width across-flats at;
e) Added a new Figure for straightness at 6.5.5 and modified values in Table 13;
f) Introduction in the chemical composition Tables of a footnote to explain the meaning of elements for
which no upper and lower limits are defined;
g) Deleted alloys groups in Table 3;
h) Chemical composition of CuZn39Pb3 (CW614N), CuZn40Pb2 (CW617N), CuZn35Pb1,5AlAs
(CW625N) and CuZn33Pb1,5AlAs (CW626N) modified in Table 3;
i) Added a new alloy CuZn40Pb1 (CW627N) in Table 6 and Table 7;
j) Chemical composition of CuZn33Pb1AlSiAs (CW725R) modified in Table 4;
k) Added a new alloy CuZn36Si1P (CW726R) in Table 4 and Table 8
l) Modified the range of dimensions in Table 9 and in Table 11;
m) Table 18 and Table 19 added;
n) Annex ZA added.
This document is one of a series of European Standards for the copper and copper alloy products rod,
wire, profile and forgings. Other products are specified as follows:
— EN 12163, Copper and copper alloys — Rod for general purposes;
— EN 12164, Copper and copper alloys — Rod for free machining purposes;
— EN 12165, Copper and copper alloys — Wrought and unwrought forging stock;
— EN 12166, Copper and copper alloys — Wire for general purposes;
— EN 12167, Copper and copper alloys — Profiles and bars for general purposes;
oSIST prEN 12168:2022
prEN 12168:2022 (E)
— EN 13601, Copper and copper alloys — Copper rod, bar and wire for general electrical purposes;
— EN 13602, Copper and copper alloys — Drawn, round copper wire for the manufacture of electrical
— EN 13605, Copper and copper alloys — Copper profiles and profiled wire for electrical purposes.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part
of this document.

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