1、May 2017 English price group 9No 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).ICS 77.120.20!%dn“2659675www.din.deDIN EN
2、 12421Magnesium and magnesium alloys Unalloyed magnesium;English version EN 12421:2017,English translation of DIN EN 12421:2017-05Magnesium und Magnesiumlegierungen Reinmagnesium;Englische Fassung EN 12421:2017,Englische bersetzung von DIN EN 12421:2017-05Magnsium et alliages de magnsium Magnsium no
3、n alli;Version anglaise EN 12421:2017,Traduction anglaise de DIN EN 12421:2017-05SupersedesDIN EN 12421:199806www.beuth.deDocument comprises 13 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.04.17 DIN EN 12421:2017-05 2 A comm
4、a is used as the decimal marker. National foreword This document (EN 12421:2017) has been prepared by Technical Committee CEN/TC 190 “Foundry practice” (Secretariat: DIN, Germany), Working Group CEN/TC 190/WG 9 “Cast magnesium” (Secretariat: AFNOR, France). The responsible German body involved in it
5、s preparation was DIN Working Committee NA 036-00-02 GA “Joint working committee Foundry Practice Standards/Nonferrous Metals Standards: Cast magnesium” of DIN-Normenausschuss Gieereiwesen (DIN Standards Committee Foundry Practice). Amendments This standard differs from DIN EN 12421:1998-06 as follo
6、ws: a) in Clause 8, requirements for sampling have been included; b) in Clause 12, requirements for packaging and surface protection have been included; c) in Table 1, four new material grades have been included; d) the structure of the designation with numbers has been amended; e) Annex A comparing
7、 cast unalloyed magnesium material designations according to EN 12421 and ISO has been included. Previous editions DIN EN 12421: 1998-06 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12421 March 2017 ICS 77.120.20 Supersedes EN 12421:1998English Version Magnesium and magnesium alloys - Unallo
8、yed magnesiumMagnsium et alliages de magnsium - Magnsium non alli Magnesium und Magnesiumlegierungen - Reinmagnesium This European Standard was approved by CEN on 6 January 2017. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
9、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 ver
10、sions (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
11、, 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, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain,
12、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 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide fo
13、r CEN national Members. Ref. No. EN 12421:2017 EEN 12421:2017 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Designations 5 5 Order information 5 6 Manufacture 6 7 Requirements . 6 7.1 Chemical composition . 6 7.2 General con
14、dition of the product 6 8 Sampling . 6 8.1 General 6 8.2 Frequency and number of tests . 6 9 Testing . 6 9.1 Determination of the chemical composition . 6 9.2 Rounding of results of chemical analysis . 6 10 Inspection documentation . 8 11 Marking . 8 12 Packaging and surface protection . 8 13 Compla
15、ints . 8 Annex A (informative) Comparison of cast unalloyed magnesium material designations according to EN 12421 and ISO 8287 3 9 Annex B (informative) Significant technical changes between this European Standard and the previous edition 10 Bibliography . 11 DIN EN 12421:2017-05 EN 12421:2017 (E) 3
16、 European foreword This document (EN 12421:2017) has been prepared by Technical Committee CEN/TC 190 “Foundry Technology”, 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, a
17、t the latest by September 2017, and conflicting national standards shall be withdrawn at the latest by September 2017. 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 su
18、ch patent rights. This document supersedes EN 12421:1998. Within its programme of work, Technical Committee CEN/TC 190 requested CEN/TC 190/WG 9 “Cast magnesium” to revise: EN 12421:1998, Magnesium and magnesium alloys Unalloyed magnesium Annex B provides details of significant technical changes bet
19、ween this European Standard and the previous edition. According to the CEN-CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finla
20、nd, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. DIN EN 12421:2017-05 EN 1
21、2421:2017 (E) 4 Introduction This European Standard classifies cast unalloyed magnesium into a number of grades suitable for the applications for which they might be used. Four new grades of cast unalloyed magnesium, as specified in ISO 8287:2011 3, has been added. In this European Standard a new de
22、signation 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. DIN EN 12421:2017-05 EN 12421:2017 (E) 5 1 Scope This Euro
23、pean Standard specifies the grades and corresponding requirements for cast unalloyed magnesium. This European Standard specifies the chemical composition, designation, testing, marking and inspection documentation. 2 Normative references The following documents, in whole or in part, are normatively
24、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 the referenced document (including any amendments) applies. EN 10204, Metallic products - Types of inspection documents EN ISO 80
25、000-1:2013, 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 definitions apply. 3.1 unalloyed magnesium material where the minimum magnesium content is 99,0 % (mass fraction) 3.2 cast unalloyed m
26、agnesium unalloyed magnesium processed in various moulds 4 Designations The material shall be designated either by symbol or by number, as given in Table 1. NOTE The comparison of EN 12421 grade designations with the designations from the ISO standard for unalloyed magnesium, ISO 8287 3, is given in
27、 Annex A. 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) product shape; d) quantity (e.g. number, mass, etc.); e) any special requirements. All requirements shall be agreed between the
28、manufacturer and the purchaser by the time of acceptance of the order. DIN EN 12421:2017-05 EN 12421:2017 (E) 6 6 Manufacture The manufacturing process shall be left to the discretion of the manufacturer unless otherwise agreed at the time of ordering. NOTE The manufacturing process covers all opera
29、tions up to the delivery of the product. 7 Requirements 7.1 Chemical composition The chemical composition of cast unalloyed magnesium shall be in accordance with the requirements as given in Table 1. If not otherwise specified in the enquiry and order, the chemical composition of the cast unalloyed
30、magnesium shall relate to that of the samples taken from the melt at the time of pouring. 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
31、 to a level also agreed between the manufacturer and the purchaser. 8 Sampling 8.1 General Samples for chemical analysis shall be made from the same material as that used to produce the material which they represent. All samples shall be adequately marked to guarantee full traceability to the materi
32、al 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 be produced at a frequency in accordance with the process quality assuranc
33、e 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 chemical composition The methods used to determine the chemical composition
34、 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 shall be expressed to the same number of decimal places as the corresponding
35、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 of the rules has been agreed at the time of acceptance of the order. DIN E
36、N 12421:2017-05 EN 12421:2017 (E) 7 Table 1 Chemical composition of cast unalloyed magnesium Material designation Chemical composition % (mass fraction) Symbol Number Element Al Mn Si Fe Cu Ni Pb Sn Na Ca Zn Others each Mg aEN-MB99,5 3.5201 min. max. 0,1 0,1 0,1 0,1 0,1 0,01 0,01 0,01 0,05 99,5 EN-M
37、B99,80-A 3.5202 min. max. 0,05 0,05 0,05 0,05 0,02 0,001 0,01 0,01 0,003 0,003 0,05 0,05 99,80 EN-MB99,80-B 3.5203 min. max. 0,05 0,05 0,05 0,05 0,02 0,002 0,01 0,01 0,05 0,05 99,80 EN-MB99,80-C 3.5204 min. max. 0,05 0,1 0,02 0,004 0,005 0,001 0,01 99,80 EN-MB99,90 3.5205 min. max. 0,02 0,03 0,03 0,
38、004 0,004 0,001 0,01 99,90 EN-MB99,95-A 3.5206 min. max. 0,01 0,006 0,006 0,003 0,005 0,001 0,005 0,005 0,003 0,003 0,005 0,005 99,95 EN-MB99,95-B 3.5207 min. max. 0,01 0,01 0,01 0,005 0,005 0,001 0,005 0,005 0,01 0,005 99,95 EN-MB99,98 3.5208 min. max. 0,004 0,002 0,003 0,002 0,000 5 0,000 5 0,001
39、0,004 0,004 0,005 99,98 EN-MB99,99 3.5209 min. max. 0,002 0,002 0,003 0,002 0,000 3 0,000 3 0,002 0,002 0,003 0,003 99,99 NOTE The material designation is in accordance with EN 1754 1. aBalanceDIN EN 12421:2017-05 EN 12421:2017 (E) 8 10 Inspection documentation When requested by the purchaser and ag
40、reed with the manufacturer, the manufacturer shall issue for the products the appropriate inspection documentation according to EN 10204. The material manufacturer is responsible for affirming conformity with the specification for the material ordered. 11 Marking Unless otherwise agreed, each produc
41、t, or bundle of products, shall be clearly marked with the following: manufacturers identification; material designation; melt identification; unit weight (mass). The method of marking is left to the discretion of the manufacturer. Markings shall be indelible and shall not be a source of contaminati
42、on. 12 Packaging and surface protection Packaging and/or surface protection, if any, for the transport or storage of the products, shall be at the discretion of the manufacturer unless a specific agreement has been made by the time of acceptance of the order. The packaging method should ensure the f
43、ull protection of the products until their final destination. 13 Complaints In case of any complaint, the manufacturer shall be able to examine the validity of the complaint within a reasonable time. If applicable, the sampling conditions and the test methods used to evaluate the disputed characteri
44、stic shall be in accordance with the requirements given in Clause 8 and Clause 9. Unless otherwise agreed, complaints on technical matters may only be made when the specified requirements are not met. DIN EN 12421:2017-05 EN 12421:2017 (E) 9 Annex A (informative) Comparison of cast unalloyed magnesi
45、um material designations according to EN 12421 and ISO 8287 3 This informative annex compares the material designation of the standardized grades of cast unalloyed magnesium based on the EN and ISO designations, see Table A.1. Table A.1 Material designations of cast unalloyed magnesium EN 12421:2017
46、 EN 12421:1998 ISO 8287:2011 symbol number symbol number EN-MB99,5 3.5201 EN-MB99,5 EN-MB10010 ISO Mg 99,5 EN-MB99,80-A 3.5202 EN-MB99,80-A EN-MB10020 ISO Mg 99,80A EN-MB99,80-B 3.5203 EN-MB99,80-B EN-MB10021 ISO Mg 99,80B EN-MB99,80-C 3.5204 a aISO Mg 99,80C EN-MB99,90 3.5205 a aISO Mg 99,90 EN-MB9
47、9,95-A 3.5206 EN-MB99,95-A EN-MB10030 ISO Mg 99,95A EN-MB99,95-B 3.5207 EN-MB99,95-B EN-MB10031 ISO Mg 99,95B EN-MB99,98 3.5208 a aISO Mg 99,98 EN-MB99,99 3.5209 a aISO Mg 99,99 aNot included in EN 12421:1998. DIN EN 12421:2017-05 EN 12421:2017 (E) 10 Annex B (informative) Significant technical chan
48、ges between this European Standard and the previous edition Table B.1 Significant technical changes between this European Standard and the previous edition Clause/Paragraph/Table/Figure Change Clause 8 Requirements regarding sampling added. Clause 12 Requirements regarding packaging and surface protection added. Table 1 Addition of 4 new grades of cast unalloyed magnesium. Structure of designation by numbers has been changed. Annex A Informative Annex A for the comparison
