1、September 2014Translation by DIN-Sprachendienst.English price group 20No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I
2、CS 77.150.30!%:C“2239632www.din.deDDIN EN 12420Copper and copper alloys Forgings;English version EN 12420:2014,English translation of DIN EN 12420:2014-09Kupfer und Kupferlegierungen Schmiedestcke;Englische Fassung EN 12420:2014,Englische bersetzung von DIN EN 12420:2014-09Cuivre et alliages de cuiv
3、re Pices forges;Version anglaise EN 12420:2014,Traduction anglaise de DIN EN 12420:2014-09SupersedesDIN EN 12420:1999-03www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 61 pages08.14 DIN EN 12420:2014-09 2 A comma is used as the decimal
4、marker. National foreword This standard has been prepared by Technical Committee CEN/TC 133 “Copper and copper alloys” (Secre-tariat: DIN, Germany). The responsible German body involved in its preparation was the Normenausschuss Nichteisenmetalle (DIN Standards Committee Nonferrous Metals), Working
5、Committee NA 066-02-04 AA Strangpress- und Zieh-erzeugnisse. Amendments This standard differs from DIN EN 12420:1999-03 as follows: a) materials have been aligned with EN 12165:2010; b) mechanical properties have been modified to reflect market needs; c) Annex B (informative) “Tensile properties” ha
6、s been added as an aid to component design. Previous editions DIN 1714: 1936x-02 DIN 17673:1957-04 DIN 17673-1: 1961-08, 1969-01, 1974-06, 1983-12 DIN 17673-2:1957-04, 1963-03, 1973-12 DIN 17673-3: 1963-03, 1974-01 DIN 17673-4: 1963-03, 1974-01 DIN 17678-1: 1973-12, 1983-12 DIN 17678-2: 1973-11 DIN
7、17678-3: 1973-12 DIN 17678-4: 1973-12 DIN EN 12420: 1999-03 EN 12420June 2014 ICS 77.150.30 Supersedes EN 12420:1999English Version Copper and copper alloys - Forgings Cuivre et alliages de cuivre - Pices forges Kupfer und Kupferlegierungen - Schmiedestcke This European Standard was approved by CEN
8、on 24 April 2014. 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 ma
9、y 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
10、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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland
11、, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by a
12、ny means reserved worldwide for CEN national Members. Ref. No. EN 12420:2014 EEUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMContents PageForeword 4 Introduction .6 1 Scope 7 2 Normative references 7 3
13、Terms and definitions .7 4 Designations 8 4.1 Material .8 4.1.1 General 8 4.1.2 Symbol 8 4.1.3 Number .8 4.2 Material condition 8 4.3 Product .8 5 Ordering information 10 6 Requirements 10 6.1 Composition 10 6.2 Mechanical properties 11 6.2.1 Hardness properties . 11 6.2.2 Tensile properties . 11 6.
14、3 Electrical properties . 11 6.4 Resistance to dezincification 11 6.5 Residual stress level 11 6.6 Tolerances for die forgings . 11 6.6.1 General . 11 6.6.2 Tolerances for dimensions within the die cavity and for dimensions across the die parting line . 12 6.6.3 Mismatch . 13 6.6.4 Flash projection
15、14 6.6.5 Ejector marks 15 6.6.6 Flatness tolerances 15 6.6.7 Angular tolerances . 16 6.7 Tolerances for cored forgings . 16 6.8 Tolerances for hand forgings 17 6.8.1 General . 17 6.8.2 Tolerances on dimensions 18 6.8.3 Flatness tolerance 18 6.9 Surface quality 19 6.10 Drawings 19 7 Sampling 19 7.1 G
16、eneral . 19 7.2 Analysis . 19 7.3 Hardness, stress corrosion resistance, dezincification resistance and electrical property tests 20 8 Test methods . 20 8.1 Analysis . 20 8.2 Hardness test 20 EN 12420:2014 (E) DIN EN 12420:2014-0928.3 Electrical conductivity test . 20 8.4 Dezincification resistance
17、test . 20 8.5 Stress corrosion resistance test 20 8.6 Retests 21 8.6.1 Analysis, hardness, electrical conductivity and dezincification resistance tests 21 8.6.2 Stress corrosion resistance test 21 8.7 Rounding of results . 21 9 Declaration of conformity and inspection documentation . 21 9.1 Declarat
18、ion of conformity . 21 9.2 Inspection documentation 21 10 Marking, labelling, packaging 22 Annex A (informative) Recommended guidelines for design . 39 A.1 Introduction 39 A.2 General information 39 A.3 Guidelines for die forgings . 40 A.3.1 Drafts 40 A.3.2 Web thicknesses . 40 A.3.3 Side wall thick
19、nesses 41 A.3.4 Rib design 42 A.3.5 Cores . 43 A.3.6 Flash . 44 A.3.7 Transition radii . 45 A.3.8 Clamping lengths and clamping areas for finish machining 47 A.3.9 Design for cross-sectional shapes 47 A.3.10 Recommended machining allowances and total allowances . 48 A.4 Guidelines for hand forgings
20、. 50 A.4.1 General . 50 A.4.2 General information 50 A.4.3 Section changes and transitions . 51 A.4.4 Recommended machining allowances . 51 A.4.5 Total allowances per side of forging . 52 A.5 Guidelines for marking . 52 Annex B (informative) Tensile properties . 54 Annex ZA (informative) Relationshi
21、p between this European Standard and the Essential Requirements of EU Directive 97/23/EC, Pressure Equipment Directive (PED) . 58 Bibliography 59 EN 12420:2014 (E)DIN EN 12420:2014-093Foreword This document (EN 12420:2014) has been prepared by Technical Committee CEN/TC 133 “Copper and copper alloys
22、”, 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 December 2014 and conflicting national standards shall be withdrawn at the latest by December 2014. Atte
23、ntion 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 12420:1999. This document has been prepared under a mandate gi
24、ven to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Pressure Equipment Directive (PED) 97/23/EC. For relationship with EU Directive 97/23/EC, see informative Annex ZA, which is an integral part of this document. This is one of a se
25、ries 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 a
26、lloys Wrought and unwrought forging stock; EN 12166, Copper and copper alloys Wire for general purposes; EN 12167, Copper and copper alloys Profiles and rectangular bars for general purposes; EN 12168, Copper and copper alloys Hollow rod for free machining purposes. Within its programme of work, Tec
27、hnical Committee CEN/TC 133 requested CEN/TC 133/WG 4 “Extruded and drawn products, forgings and scrap” to revise the following standard: EN 12420:1999, Copper and copper alloys Forgings. In comparison with EN 12420:1999, the following significant technical changes were made: 1) new text has been in
28、troduced concerning optional restrictions to chemical compositions of materials with respect to individual uses or regulations for the use in contact with drinking water; 2) materials have been considered coherently with EN 12165:2011; 3) four new materials have been added: CuZn35Pb1,5AlAs (CW625N),
29、 CuZn33Pb1,5AlAs (CW626N), CuZn21Si3P (CW724R) and CuZn33Pb1AlSiAs (CW725R); 4) the mechanical properties have been modified to reflect market needs; 5) an informative Annex B Tensile properties has been introduced. EN 12420:2014 (E) DIN EN 12420:2014-094According to the CEN-CENELEC Internal Regulat
30、ions, 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Ital
31、y, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. EN 12420:2014 (E)DIN EN 12420:2014-095Introduction The European Committee for Standardization (CEN) draws attention to the fact that
32、 it is claimed that compliance with this document may involve the use of a patent concerning the alloys CuZn21Si3P (CW724R) and CuZn33Pb1AlSiAs (CW725R). CEN takes no position concerning the evidence, validity and scope of this patent right. The holder of this patent right has ensured the CEN that h
33、e/she is willing to negotiate licences under reasonable and not-discriminatory terms and conditions with applicants throughout the world. In this respect, the statement of the holder of this patent right is registered with CEN. For CuZn21Si3P (CW724R) information may be obtained from: Wieland-Werke
34、AG Graf Arco Strae 36 89079 Ulm GERMANY For CuZn33Pb1AlSiAs (CW725R) information may be obtained from: Diehl Metall Messing Heinrich-Diehl-Strae 9 D-90552 Rthenbach/Pegnitz GERMANY Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights ot
35、her than those identified above. CEN shall not be held responsible for identifying any or all such patent rights. CEN (http:/www.cen.eu/cen/WorkArea/IPR/Pages/default.aspx) and CENELEC (http:/www.cenelec.eu/membersandexperts/toolsandapplications/index.html) maintain on-line lists of patents relevant
36、 to their standards. Users are encouraged to consult the lists for the most up to date information concerning patents. Due to developing legislation, the composition of a material may be restricted to the composition specified in this European Standard with respect to individual uses (e.g. for the u
37、se in contact with drinking water in some Member States of the European Union). These individual restrictions are not part of this European Standard. Nevertheless, for materials for which traditional and major uses are affected, these restrictions are indicated. The absence of an indication, however
38、, does not imply that the material can be used in any application without any legal restriction. EN 12420:2014 (E) DIN EN 12420:2014-0961 Scope This European Standard specifies the composition, the property requirements and tolerances on dimensions and form for copper and copper alloy die and hand f
39、orgings. The sampling procedures, the methods of test for verification of conformity to the requirements of this standard, and the delivery conditions are also specified. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispen
40、sable for its application. 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 condition designation EN 1655, Copper and copper alloys Declarations o
41、f conformity EN 1976, Copper and copper alloys Cast unwrought copper products 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, Metallic materials Brinell hardness test Part 1: Test method (IS
42、O 6506-1) EN ISO 6509, Corrosion of metals and alloys Determination of dezincification resistance of brass (ISO 6509) ISO 2768-1, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications ISO 6957, Copper alloys Ammonia test for stress corrosion
43、 resistance 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 forging wrought product, hot formed by hammering or pressing 3.1.1 die forging forging produced between closed dies 3.1.2 hand forging forging produced between open dies 3.1.3 cored
44、forging forging produced between closed dies including cores EN 12420:2014 (E)DIN EN 12420:2014-0973.2 deviation from concentricity half of the difference between the maximum and the minimum wall thickness (smaxand smin), measured in the same plane perpendicular to the axis of the forging Note 1 to
45、entry: Deviation from concentricity (mm) = (smax smin)/2. 3.3 inspection lot definite quantity of products of the same cross-sectional dimensions, the same material and material condition, collected together for inspection (testing) 4 Designations 4.1 Material 4.1.1 General The material is designate
46、d either by symbol or number (see Tables 1 to 8). 4.1.2 Symbol The material symbol designation is based on the designation system given in ISO 1190-1. NOTE Although material symbol designations used in this standard might be the same as those in other standards using the designation system given in
47、ISO 1190-1, the detailed composition requirements are not necessarily the same. 4.1.3 Number The material number designation is in accordance with the system given in EN 1412. 4.2 Material condition For the purposes of this standard, the following designations, which are in accordance with the syste
48、m given in EN 1173, apply for the material condition: M Material condition for the product as manufactured without specified mechanical properties; H. Material condition designated by the minimum value of hardness requirement for the product with mandatory hardness requirements; S (suffix) Material
49、condition for a product which is stress relieved. Products in the M or H. condition may be specially processed (i.e. mechanically or thermally stress relieved) in order to lower the residual stress level to improve the resistance to stress corrosion and the dimensional stability on machining see Clause 5, list entry g) and list entry h). Except when the suffix S is used, material condition is designated by only one of the above design
