1、Magnesium and magnesium alloys - Magnesium alloys for cast anodesBS EN 12438:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12438 September 2017 ICS 77.120.20; 77.150.20 Supersedes EN 12438:1998English Version
2、 Magnesium and magnesium alloys - Magnesium alloys for cast anodes Magnsium et alliages de magnsium - Alliages de magnsium pour anodes coules Magnesium und Magnesiumlegierungen - Magnesiumlegierungen fr Gussanoden This European Standard was approved by CEN on 2 July 2017. CEN members are bound to co
3、mply 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-CENEL
4、EC 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
5、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, Ireland, Italy, Latvia, Lithuania, Luxembou
6、rg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 B
7、russels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12438:2017 ENational forewordThis British Standard is the UK implementation of EN 12438:2017. It supersedes BS EN 12438:1998, which is withdrawn.The UK participation in i
8、ts preparation was entrusted to Technical Committee ISE/111, Steel Castings and Forgings.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible fo
9、r its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 91096 8ICS 77.150.20; 17.100; 77.120.20Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of t
10、he Standards Policy and Strategy Committee on 30 September 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 12438:2017EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12438 September 2017 ICS 77.120.20; 77.150.20 Supersedes EN 12438:1998English Version M
11、agnesium and magnesium alloys - Magnesium alloys for cast anodes Magnsium et alliages de magnsium - Alliages de magnsium pour anodes coules Magnesium und Magnesiumlegierungen - Magnesiumlegierungen fr Gussanoden This European Standard was approved by CEN on 2 July 2017. CEN members are bound to comp
12、ly 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
13、 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 sa
14、me 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, Ireland, Italy, Latvia, Lithuania, Luxembourg
15、, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Bru
16、ssels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12438:2017 EBS EN 12438:2017EN 12438:2017 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Designat
17、ions 5 5 Order information 6 6 Manufacture 6 7 Requirements . 6 8 Sampling . 9 9 Testing . 9 10 Inspection documentation . 9 11 Packaging and surface protection . 9 Annex A (normative) Test method for the determination of the electrode potential of galvanic anodes . 10 Annex B (normative) Test metho
18、d for the determination of the rate of mass loss of galvanic anodes 12 Annex C (informative) Comparison of the designations of magnesium alloy ingots for cast anodes and magnesium alloy cast anodes according to this standard and its previous version . 16 Annex D (informative) Significant technical c
19、hanges between this European Standard and the previous edition 17 Bibliography . 18 BS EN 12438:2017EN 12438:2017 (E) 3 European foreword This document (EN 12438:2017) has been prepared by Technical Committee CEN/TC 190 “Foundry technology”, the secretariat of which is held by DIN. This European Sta
20、ndard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by March 2018, and conflicting national standards shall be withdrawn at the latest by March 2018. Attention is drawn to the possibility that some of the elements of thi
21、s 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 12438:1998. Within its programme of work, Technical Committee CEN/TC 190 requested CEN/TC 190/WG 9 “Cast magnesium” to revise: E
22、N 12438:1998, Magnesium and magnesium alloys Magnesium alloys for cast anodes Annex D provides details of significant technical changes between this European Standard and the previous edition. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following co
23、untries 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, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
24、Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12438:2017EN 12438:2017 (E) 4 Introduction This European Standard classifies magnesium alloys for cast anodes into a number of grades suitable for the applications for which they m
25、ight be used. In this European Standard, a new designation system by number, as established in EN 1754 1, is given. NOTE This designation system by number is based on the structure and rules of EN 100272 2 and so corresponds with the European numbering system for steel and other materials. BS EN 124
26、38:2017EN 12438:2017 (E) 5 1 Scope This European Standard specifies the grades and the corresponding requirements for magnesium alloys for cast anodes. This European Standard specifies 2 groups of cast magnesium alloy grades by a classification based on chemical composition. The first group deals wi
27、th magnesium alloy ingots for anodes. The second group deals with magnesium alloy anode castings. This European Standard specifies chemical composition, designation, testing and inspection documentation. This European Standard does not cover technical delivery conditions for magnesium alloy anode ca
28、stings (see EN 1559-1 3 and EN 1559-5 4). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of th
29、e referenced document (including any amendments) applies. EN 10204, Metallic products - Types of inspection documents EN ISO 80000-1:2013, Quantities and units - Part 1: General (ISO 80000-1:2009 + Cor 1:2011) 3 Terms and definitions For the purposes of this document, the following terms and definit
30、ions apply. 3.1 anode electrode where oxidation reactions take place 3.2 galvanic anode anode attached to a metal object to inhibit the corrosion of the object 4 Designations 4.1 Material The material shall be designated either by symbol or by number as given in Table 1 and Table 2. NOTE The compari
31、son of EN 12438 grade designations with the designations from the previous version of this European Standard is given in Annex C. 4.2 Casting process The following symbols shall be used to indicate the different casting processes: S Sand casting; K Permanent mould casting (gravity); C Continuous cas
32、ting. NOTE Examples of the use of these designations are given in EN 15595 4. BS EN 12438:2017EN 12438:2017 (E) 6 5 Order information The following information shall be supplied by the purchaser: a) the number of this European Standard; b) the designation of the material; c) any special requirements
33、. All requirements shall be agreed between the manufacturer and the purchaser by the time of acceptance of the order (e.g. technical delivery conditions according to EN 1559-1 3 and EN 1559-5 4). 6 Manufacture The manufacturing process shall be left to the discretion of the manufacturer unless other
34、wise agreed at the time of ordering. NOTE The manufacturing process covers all operations up to the delivery of the product. 7 Requirements 7.1 Chemical composition The chemical composition of magnesium alloy ingots for anode castings shall be in accordance with the requirements given in Table 1. Th
35、e chemical composition of magnesium alloy cast anodes shall be in accordance with the requirements given in Table 2. If not otherwise specified in the enquiry and order, the chemical composition of the ingots or the cast anodes shall relate to that of the samples taken from the melt at the time of p
36、ouring. 7.2 General condition of the product The product shall have a clean surface, in accordance with an agreement between the manufacturer and the purchaser, and shall be free from visible and internal imperfections to a level also agreed between the manufacturer and the purchaser. BS EN 12438:20
37、17EN12438:2017(E)7Table1Chemicalcompositionofmagnesium alloyingotsforcastanodesAlloygroupMaterialdesignationComposition%(mass fraction)ElementMgAlZnMnSiFeCuNiOthers(each)SymbolNumberMgAlZnEN-MBMgAl3Zn13.5212min.Rem.2,60,70,20max.3,51,41,00,300,010,050,0010,05EN-MBMgAl6Zn13.5213min.Rem.5,60,70,20max.
38、6,51,41,00,300,010,050,0010,05EN-MBMgAl6Zn33.5214min.Rem.5,12,10,20max.7,04,01,00,300,010,050,0010,05MgMnEN-MBMgMn13.5230min.Rem.0,50max.0,010,051,30,050,020,020,0010,05EN-MBMgMn23.5231min.Rem.1,20max.0,010,052,50,050,020,020,0010,05NOTEThematerialdesignationisinaccordancewithEN17541.BS EN 12438:201
39、7EN12438:2017(E)8Table2Chemicalcompositionofmagnesium alloycastanodesAlloygroupMaterialdesignationCastingprocessaComposition%(mass fraction)ElementMgAlZnMnSiFeCuNiOthers(each)As+Sb+Pb+Cr+NibCd+Hg+SebSymbolNumberMgAlZnEN-MAMgAl3Zn13.5112S, K, Cmin.Rem.2,50,60,2max.3,51,41,00,30,020,050,0020,050,10,01
40、EN-MAMgAl6Zn13.5113S, K, Cmin.Rem.5,50,60,2max.6,51,41,00,30,020,050,0020,050,10,01EN-MAMgAl6Zn33.5114S, K, Cmin.Rem.5,02,00,2max.7,04,01,00,30,020,050,0020,050,10,01MgMnEN-MAMgMn13.5130S, K, Cmin.Rem.0,5max.0,010,051,30,050,030,020,0020,050,10,01EN-MAMgMn23.5131S, K, Cmin.Rem.1,2max.0,010,052,50,05
41、0,030,020,0020,050,10,01NOTEThematerialdesignationisinaccordancewithEN17541.aS=Sand casting;K=Permanent mould casting(gravity);C=Continuouscasting.bOnlyforanodesusedinpotablewater(tapwater).BS EN 12438:2017EN12438:2017(E)8Table2Chemicalcompositionofmagnesium alloycastanodesAlloygroupMaterialdesignat
42、ionCastingprocessaComposition%(mass fraction)ElementMgAlZnMnSiFeCuNiOthers(each)As+Sb+Pb+Cr+NibCd+Hg+SebSymbolNumberMgAlZnEN-MAMgAl3Zn13.5112S, K, Cmin.Rem.2,50,60,2max.3,51,41,00,30,020,050,0020,050,10,01EN-MAMgAl6Zn13.5113S, K, Cmin.Rem.5,50,60,2max.6,51,41,00,30,020,050,0020,050,10,01EN-MAMgAl6Zn
43、33.5114S, K, Cmin.Rem.5,02,00,2max.7,04,01,00,30,020,050,0020,050,10,01MgMnEN-MAMgMn13.5130S, K, Cmin.Rem.0,5max.0,010,051,30,050,030,020,0020,050,10,01EN-MAMgMn23.5131S, K, Cmin.Rem.1,2max.0,010,052,50,050,030,020,0020,050,10,01NOTEThematerialdesignationisinaccordancewithEN17541.aS=Sand casting;K=P
44、ermanent mould casting(gravity);C=Continuouscasting.bOnlyforanodesusedinpotablewater(tapwater).EN 12438:2017 (E) 9 8 Sampling 8.1 General Samples for the determination of the chemical composition shall be made from the same material as that used to produce the product which they represent. All sampl
45、es shall be adequately marked to guarantee full traceability to the product which they represent. The samples for the determination of the chemical composition shall be cast in a manner which ensures accurate results. 8.2 Frequency and number of tests Samples, representative of the material, shall b
46、e produced at a frequency in accordance with the process quality assurance procedures adopted by the manufacturer or as agreed with the purchaser. The quality assurance procedures for sampling should be based on appropriate and recognized statistical principles. 9 Testing 9.1 Determination of the ch
47、emical composition The methods used to determine the chemical composition of the material shall be in accordance with standardized methods or validated procedures. 9.2 Rounding of results of chemical analysis In recording the result obtained for any value specified in this European Standard, it shal
48、l be expressed to the same number of decimal places as the corresponding value in this European Standard. Rounding shall be carried out as specified in EN ISO 80000-1:2013, B.2 and B.3. In B.3, it is left to the discretion of the manufacturer as to whether to use Rule A or B, unless the use of one o
49、f the rules has been agreed at the time of acceptance of the order. 9.3 Electrochemical testing If applicable, electrochemical testing shall be carried out in accordance with Annex A and Annex B. 10 Inspection documentation When requested by the purchaser and agreed with the manufacturer, the manufacturer shall issue for the products the appropriate inspection documentation according to EN 10204. 11 Packaging a
