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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 12421:1998 The Euro
2、pean Standard EN 12421:1998 has the status of a British Standard ICS 77.120.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Magnesium and magnesium alloys Unalloyed magnesium This British Standard, having been prepared under the direction of the Engineering Sector Board, wa
3、s published under the authority of the Standards Board and comes into effect on 15 November 1998 BSI 1998 ISBN 0 580 29992 9 BS EN 12421:1998 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the English language version of EN 12421:1998. The UK
4、 participation in its preparation was entrusted by Technical Committee NFE/35, Light metals and their alloys, to Subcommittee NFE/35/4, Magnesium and magnesium alloys, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries o
5、n the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British
6、 Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Stand
7、ard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover,
8、an inside front cover, the EN title page, pages 2 to 5 and a back cover. CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any
9、 means reserved worldwide for CEN national Members. Ref. No. EN 12421:1998 E EUROPEAN STANDARDEN 12421 NORME EUROPE ENNE EUROPA ISCHE NORM April 1998 ICS 77.120.20 Descriptors: Magnesium, chemical composition, designation, quality, classification, marking, tests English version Magnesium and magnesi
10、um alloys Unalloyed magnesium Magne sium et alliages de magne sium Magne sium non allie Magnesium und Magnesiumlegierungen Reinmagnesium This European Standard was approved by CEN on 25 March 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditio
11、ns 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 Central Secretariat or to any CEN member. This European Standard exists in three off
12、icial 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria,
13、 Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 12421:1998 BSI 1998 Foreword This European Standard has been prepared by Technical Committee CEN/TC 190, F
14、oundry technology, the secretariat of which is held by DIN. Within its programme of work, Technical Committee CEN/TC 190 requested CEN/TC 190/WG 3.10, Cast magnesium, to prepare the following standard: EN 12421, Magnesium and magnesium alloys Unalloyed magnesium. This European Standard shall be give
15、n the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 1998, and conflicting national standards shall be withdrawn at the latest by October 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizatio
16、ns of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 Int
17、roduction3 1Scope3 2Normative references3 3Definitions3 3.1unalloyed magnesium3 3.2cast unalloyed magnesium3 4Information to be supplied by the purchaser3 5Designation3 6Manufacture3 7Requirements3 7.1Chemical composition3 7.2General condition of the product3 8Testing3 9Rounding of numbers3 10Declar
18、ation of conformity and inspection documents3 11Marking5 12Complaints5 Annex A (informative) Bibliography5 ? Page 3 EN 12421:1998 BSI 1998 Introduction This European Standard classifies the commercially available cast unalloyed magnesium into a number of grades suitable for the applications to which
19、 they might be put. 1 Scope This European Standard specifies the chemical composition of cast unalloyed magnesium. It specifies classification, designation and marking. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. Thes
20、e normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undate
21、d references, the latest edition of the publication referred to applies. ISO 31-0:1992, Quantities and units Part 0: General principles. NOTEInformative references to documents used in the preparation of this standard and cited at the appropriate places in the text, are listed in a bibliography, see
22、 annex A. 3 Definitions For the purposes of this standard the following definitions apply. 3.1 unalloyed magnesium magnesium with a minimum mass fraction of 99,0 % 3.2 cast unalloyed magnesium unalloyed magnesium cast in a variety of shapes 4 Information to be supplied by the purchaser The enquiry a
23、nd order shall define the product required and shall contain the following information: a) material designation; b) product shape; c) quantity (e.g. number, mass, etc.); d) any requirements for declarations of conformity; e) any additional requirements agreed between the manufacturer and the purchas
24、er. 5 Designation The material shall be designated either by symbol or by number (see Table 1). 6 Manufacture The manufacturing process shall be left to the discretion of the manufacturer unless otherwise agreed at the time of ordering. NOTEThe manufacturing process covers all operations up to the d
25、elivery of the product. 7 Requirements 7.1 Chemical composition The chemical composition of cast unalloyed magnesium shall conform to the requirements for the appropriate material given in Table 1. If not otherwise specified in the enquiry and order, the chemical composition of the cast unalloyed ma
26、gnesium 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 and shall be commercially free from visible and internal defects to a standard agreed between the manufacturer and the purchaser. 8 Test
27、ing For analysis of chemical composition, samples shall be taken by the manufacturer to assure conformance to the chemical composition requirements given in Table 1 and shall be representative of the material delivered. 9 Rounding of numbers In recording chemical analysis, the number representing th
28、e result for any value specified in this standard shall be expressed to the same number of decimal places as the corresponding number in this standard. The rounding of numbers shall meet the requirements of ISO 31-0:1992, annex B, clause B.3, rule A or B. The choice shall be left to the discretion o
29、f the manufacturer, unless the use of one of the rules is agreed by the time of acceptance of the order. 10 Declaration of conformity and inspection documents If agreed between the manufacturer and the purchaser or when specified on the order, the manufacturer shall provide a declaration of product
30、conformity or an inspection document listing the results of the analysis of the chemical elements given in Table 1, and of any other element which may have been previously agreed. ? BSI 1998 Page 4 EN 12421:1998 Table 1 Chemical composition of cast unalloyed magnesium Material designationChemical co
31、mposition in per cent (mass fraction) SymbolNumberElementAlMnSiFeCuNiPbSnNaCaZnOthers each Mg1) EN-MB99,5EN-MB10010min.99,5 max.0,10,10,10,10,10,010,010,010,05 EN-MB99,80-AEN-MB10020min.99,80 max.0,050,050,050,050,020,0010,010,010,0030,0030,050,05 EN-MB99,80-BEN-MB10021min.99,80 max.0,050,050,050,05
32、0,020,0020,010,010,050,05 EN-MB99,95-AEN-MB10030min.99,95 max.0,010,0060,0060,0030,0050,0010,0050,0050,0030,0030,0050,005 EN-MB99,95-BEN-MB10031min.99,95 max.0,010,010,010,0050,0050,0010,0050,0050,010,005 1)By difference. NOTEThe material designation is in accordance with EN 1754. ? Page 5 EN 12421:
33、1998 BSI 1998 11 Marking Unless otherwise agreed, each product, 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. Marking
34、s shall be indelible and shall not be a source of contamination. 12 Complaints In case of any product complaint, the manufacturer shall be able to examine the validity of the complaint within a reasonable time. Complaints may only be raised against defective products if the defect impairs their proc
35、essing and use to a more than negligible extent. This shall apply unless otherwise agreed by the time of acceptance of the order. The purchaser shall give the manufacturer the opportunity to judge whether the complaints are justified. Annex A (informative) Bibliography In the preparation of this Eur
36、opean Standard, use was made of a document for reference purposes. This informative reference is cited at the appropriate place in the text and the publication is listed hereafter. EN 1754, Magnesium and magnesium alloys Magnesium and magnesium alloy anodes, ingots and castings Designation system. ?
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