EN 12168:2024

SLOVENSKI STANDARD
01-december-2024
Baker in bakrove zlitine - Votle palice za prosto strojno obdelavo
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: EN 12168:2024
ICS:
77.150.30 Bakreni izdelki Copper products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 12168
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2024
EUROPÄISCHE NORM
ICS 77.150.30 Supersedes EN 12168:2016
English Version
Copper and copper alloys - Hollow rod for free machining
purposes
Cuivre et alliages de cuivre - Barres creuses pour Kupfer und Kupferlegierungen - Hohlstangen für die
décolletage spanende Bearbeitung
This European Standard was approved by CEN on 30 June 2024.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12168:2024 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
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 . 9
5 Ordering information . 12
6 Requirements . 14
6.1 Composition . 14
6.2 Mechanical properties . 14
6.3 Resistance to dezincification . 14
6.4 Residual stress level . 14
6.5 Dimensions and tolerances . 14
6.5.1 Diameter or width across-flats . 14
6.5.2 Tolerance on wall thickness . 14
6.5.3 Eccentricity . 15
6.5.4 Shape tolerances . 15
6.5.5 Straightness . 15
6.5.6 Length . 15
6.5.7 Corner radii . 15
6.5.8 Twist of polygonal hollow rod . 16
6.6 Surface quality. 16
6.7 Internal inclusion . 17
7 Sampling . 17
7.1 General . 17
7.2 Analysis . 17
7.3 Mechanical tests . 17
7.4 Dezincification resistance and stress corrosion resistance tests . 17
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 . 18
8.2.4 Procedure for testing . 18
8.2.5 Determination of results . 18
8.3 Hardness test . 18
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 . 19
8.7 Rounding of results . 19
9 Certificate of Compliance and inspection documentation . 20
9.1 Certificate of Compliance . 20
9.2 Inspection documentation . 20
10 Marking, packaging, labelling . 20
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/68/EU (Pressure equipment Directive) aimed to be
covered . 39
Bibliography . 40

European foreword
This document (EN 12168:2024) has been prepared by Technical Committee CEN/TC 133 “Copper and
copper alloys”, the secretariat of which is held by DIN.
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 April 2025, and conflicting national standards shall be
withdrawn at the latest by April 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12168:2016.
In comparison with EN 12168:2016, the following significant technical changes were made:
a) Modification of the note in Clause 1;
b) Introduction of eddy current test parameters in 6.6;
c) Introduction of 6.7 Internal inclusion;
d) Modification of the definition of diameter or width across-flats in 6.5.4.1;
e) Addition of a new Figure for straightness at 6.5.5 and modification of 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 specified;
g) Deletion of alloys groups in Table 3;
h) Modification of the chemical composition of CuZn39Pb3 (CW614N), CuZn40Pb2 (CW617N),
CuZn35Pb1,5AlAs (CW625N) and CuZn33Pb1,5AlAs (CW626N) in Table 3;
i) Addition of a new alloy CuZn40Pb1 (CW627N) in Table 3 and Table 7;
j) Modification of the chemical composition of CuZn33Pb1AlSiAs (CW725R) in Table 4;
k) Addition of a new alloy CuZn36Si1P (CW726R) in Table 4 and Table 8;
l) Modification of the range of dimensions in Table 9 and in Table 11;
m) Addition of Table 18 and Table 19;
n) Addition of Annex ZA.
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;
— 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
conductors;
— EN 13605, Copper and copper alloys — Copper profiles and profiled wire for electrical purposes.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Leg
...