1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12168:2011Copper and copper alloys Hollow rod for free machiningpurposesCopyright European Committee for Standardization Provided by IHS under license with CENNot for Resal
2、eNo reproduction or networking permitted without license from IHS-,-,-BS EN 12168:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12168:2011. Itsupersedes BS EN 12168:1998 which is withdrawn.The UK participation in its preparation was entrusted to Technical
3、Committee NFE/34, Copper and copper alloys.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580
4、 67075 6ICS 77.150.30Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2011.Amendments issued since publicationDate Text affectedCopyright European Committee
5、 for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12168:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12168 June 2011 ICS 77.150.30 Supersedes EN 12168:1998English Version Copper and copper a
6、lloys - Hollow rod for free machining purposes Cuivre et alliages de cuivre - Barres creuses pour dcolletage Kupfer und Kupferlegierungen - Hohlstangen fr die spanende Bearbeitung This European Standard was approved by CEN on 14 April 2011. CEN members are bound to comply with the CEN/CENELEC Intern
7、al 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 C
8、EN 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 vers
9、ions. 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, Sl
10、ovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN
11、 national Members. Ref. No. EN 12168:2011: ECopyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12168:2011EN 12168:2011 (E) 2 Contents Page Foreword 4Introduction .61 Scope 72
12、Normative references 73 Terms and definitions .74 Designations 84.1 Material .84.1.1 General 84.1.2 Symbol 84.1.3 Number .94.2 Material condition 94.3 Product .95 Ordering information 106 Requirements 126.1 Composition 126.2 Mechanical properties 126.3 Resistance to dezincification 126.4 Residual st
13、ress level 126.5 Dimensions and tolerances . 126.5.1 Diameter or width across-flats 126.5.2 Tolerance on wall thickness 126.5.3 Eccentricity 126.5.4 Shape tolerances 136.5.5 Straightness 136.5.6 Length 136.5.7 Corner radii 136.5.8 Twist of polygonal hollow rod . 137 Sampling 147.1 General . 147.2 An
14、alysis . 147.3 Mechanical tests . 147.4 Dezincification resistance and stress corrosion resistance tests 148 Test methods . 158.1 Analysis . 158.2 Tensile test 158.2.1 General . 158.2.2 Location of test pieces . 158.2.3 Shape and size of test pieces 158.2.4 Procedure for testing . 158.2.5 Determinat
15、ion of results 158.3 Hardness test 168.4 Dezincification resistance test 168.5 Stress corrosion resistance test . 168.6 Retests . 168.6.1 Analysis, tensile, hardness and dezincification resistance tests 168.6.2 Stress corrosion resistance test . 168.7 Rounding of results 16Copyright European Committ
16、ee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12168:2011EN 12168:2011 (E) 3 9 Declaration of conformity and inspection documentation . 179.1 Declaration of conformity . 179.2 Inspection documentat
17、ion 1710 Marking, packaging, labelling 17Annex A (normative) Determination of mean depth of dezincification . 28A.1 Introduction 28A.2 Procedure . 28A.3 Expression of results 28Bibliography 30Figures Figure 1 Examples of hollow rod cross-sections . 8 Figure 2 Measurement of twist of polygonal hollow
18、 rod . 14 Figure A.1 Example of contiguous fields 29 Tables Table 1 Composition of low alloyed copper alloys 17 Table 2 Composition of copper-zinc alloys . 18 Table 3 Composition of copper-zinc-lead alloys 19 Table 4 Composition of complex copper-zinc alloys . 20 Table 5 Mechanical properties of low
19、 alloyed copper alloys 21 Table 6 Mechanical properties of copper-zinc alloys 22 Table 7 Mechanical properties of copper-zinc-lead alloys 23 Table 8 Mechanical properties of complex copper-zinc alloys . 24 Table 9 Tolerances on external diameter or width across-flats 25 Table 10 Tolerances on wall t
20、hickness 25 Table 11 Tolerances on diameter of the bore . 25 Table 12 Tolerances on eccentricity 26 Table 13 Tolerances on straightness of hollow rod . 26 Table 14 Tolerances on length of hollow rod 26 Table 15 Corner radii for hollow rod with square, hexagonal or octagonal external shape 26 Table 1
21、6 Maximum twist for hollow rod with square, hexagonal or octagonal external shape 27 Table 17 Sampling rate 27 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12168:2011EN
22、12168:2011 (E) 4 Foreword This document (EN 12168:2011) 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 e
23、ndorsement, at the latest by December 2011, and conflicting national standards shall be withdrawn at the latest by December 2011. 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
24、 identifying any or all such patent rights. This document supersedes EN 12168:1998. Within its programme of work, Technical Committee CEN/TC 133 requested CEN/TC 133/WG 4 “Extruded and drawn products, forgings and scrap“ to revise the following standard: EN 12168, Copper and copper alloys Hollow rod
25、 for free machining purposes. This is one of a series of European Standards for the copper and copper alloy products rod, wire and profile. 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
26、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 13347, Copper and copper alloys Rod and wire for welding and braze welding; EN
27、 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. In compari
28、son with EN 12168:1998, the following significant technical changes were made: a) Removal of four materials: 1) CuZn38Pb4 (CW609N) and CuZn37Pb1 (CW605N); 2) CuZn36Pb2Sn1 (CW711R) and CuZn37Pb1Sn1 (CW714R); b) Addition of five new materials: 1) CuZn40 (CW509L), CuZn42 (CW510L) and CuZn38As (CW511L)
29、due to market requirements on restriction of lead; Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12168:2011EN 12168:2011 (E) 5 2) CuZn32Pb2AsFeSi (CW709R); 3) CuZn21Si3P
30、(CW724R) due to market requirements on restriction of lead; c) Revision of the mechanical properties (Tables 5 to 8) to reflect market needs; in particular the tensile strength, the 0,2 % proof strength and the elongation that were previously informative are now mandatory since these are important f
31、igures for design purposes; d) Modification of the sampling rate (Table 17). 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,
32、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. Copyright European Committee for Standardization Provided
33、 by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12168:2011EN 12168:2011 (E) 6 Introduction The European Committee for Standardization (CEN) draws attention to the fact that it is claimed that compliance with this document may inv
34、olve the use of a patent concerning the alloy CuZn21Si3P (CW724R) given in 6.1. CEN takes no position concerning the evidence, validity and scope of this patent right. The holder of this patent right has assured the CEN that he is willing to negotiate licenses under reasonable and non-discriminatory
35、 terms and conditions with applicants throughout the world. In this respect, the statement of the holder of this patent right is registered with CEN. Information may be obtained from: Wieland Werke AG Graf Arco Strae 36 D-89079 Ulm Attention is drawn to the possibility that some of the elements of t
36、his document may be the subject of patent rights other than those identified above. CEN shall not be held responsible for identifying any or all such patent rights. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking perm
37、itted without license from IHS-,-,-BS EN 12168:2011EN 12168:2011 (E) 7 1 Scope This European Standard 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.
38、NOTE Hollow products having an outside diameter greater than 80 mm and/or a wall thickness less than 2 mm are specified in EN 12449. The sampling procedures, the methods of test for verification of conformity to the requirements of this European Standard, are also specified. 2 Normative references T
39、he 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. EN 1173, Copper and copper alloys Material conditi
40、on designation EN 1412, Copper and copper alloys European numbering system EN 1655, Copper and copper alloys Declarations of conformity EN 10204:2004, Metallic products Types of inspection documents EN 14977, Copper and copper alloys Detection of tensile stress 5 % ammonia test EN ISO 6506-1, Metall
41、ic materials Brinell hardness test Part 1: Test method (ISO 6506-1:2005) EN ISO 6509:1995, Corrosion of metals and alloys Determination of dezincification resistance of brass (ISO 6509:1981) EN ISO 6892-1, Metallic materials Tensile testing Part 1: Method of test at room temperature (ISO 6892-1:2009
42、) ISO 1190-1, Copper and copper alloys Code of designation Part 1: Designation of materials ISO 6957, Copper alloys Ammonia test for stress corrosion resistance 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 hollow rod straight product, of u
43、niform cross-section along its whole length with an enclosed void for which the longitudinal axes of its external contour and its internal contour, which is the boundary with the enclosed void, are coincidental NOTE The external and internal contours of the rod, at any cross-section, can be that of
44、a circle, square, rectangle, hexagon, or octagon, or with slight modification of those basic shapes by inclusion of detail(s) of relatively small size to the remainder of the cross-section. Examples of hollow rod cross-sections are shown in Figure 1. Copyright European Committee for Standardization
45、Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 12168:2011EN 12168:2011 (E) 8 Figure 1 Examples of hollow rod cross-sections 3.2 deviation from circular form difference between the maximum and the minimum outside diameter
46、s measured at any one cross-section of the product NOTE Adapted from EN 12163:2011. 3.3 eccentricity difference between the maximum and the minimum wall thickness, measured in the same cross-section perpendicular to the axis of the hollow rod, expressed as a percentage of the sum of the maximum and
47、minimum wall thicknesses (smax.and smin.): e = 100.min.max.min.max+ssssNOTE For polygons, wall thickness is measured perpendicular to the mid-points of the flat outside surfaces. 4 Designations 4.1 Material 4.1.1 General The material is designated either by symbol or number (see Tables 1 to 4). 4.1.2 Symbol The material symbol designation is based on the designation system given in ISO 1190-1. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
