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1、BRITISH STANDARD BS EN 1780-2:2002 Aluminium and aluminium alloys Designation of alloyed aluminium ingots for remelting, master alloys and castings Part 2: Chemical symbol based designation system The European Standard EN 1780-2:2002 has the status of a British Standard ICS 77.150.10 ? Licensed Copy
2、: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1780-2:2002 This British Standard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strat
3、egy Committee on 30 October 2002 BSI 30 October 2002 ISBN 0 580 40655 5 National foreword This British Standard is the official English language version of EN 1780-2:2002. It supersedes BS EN 1780-2:1997 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee
4、 NFE/35, Light metals and their alloys, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may b
5、e found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are
6、 responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and
7、keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright date display
8、ed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1780-2 October 20
9、02 ICS 77.150.10Supersedes EN 1780-2:2002 English version Aluminium and aluminium alloys - Designation of alloyed aluminium ingots for remelting, master alloys and castings - Part 2: Chemical symbol based designation system Aluminium et alliages daluminium - Systme de dsignation applicable aux lingo
10、ts pour refusion en aluminium alli, aux alliages-mres et aux produits mouls - Partie 2: Systme de dsignation bas sur les symboles chimiques Aluminium und Aluminiumlegierungen - Bezeichnung von legiertem Aluminium in Masseln, Vorlegierungen und Gussstcken - Teil 2: Bezeichnungssystem mit chemischen S
11、ymbolen This European Standard was approved by CEN on 2 September 2002. 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 bibliograp
12、hical references concerning such national standards may be obtained on application to the 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
13、member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norw
14、ay, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide
15、for CEN national Members. Ref. No. EN 1780-2:2002 E Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1780-2:2002 (E) 2 Contents page 1Scope 4 2Normative references 4 3Basis of codification4 4Rules for the coded designation of aluminium all
16、oys and master alloys5 4.1General5 4.2Rules for distinguishing between two alloys of similar composition5 4.3Special application for master alloys 6 Annex A (normative) International chemical symbols 7 Bibliography8 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43 GMT+00:00 2006, Unco
17、ntrolled Copy, (c) BSI EN 1780-2:2002 (E) 3 Foreword This document (EN 1780-2:2002) has been prepared by Technical Committee CEN /TC 132, “Aluminium and aluminium alloys“, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by pu
18、blication of an identical text or by endorsement, at the latest by April 2003, and conflicting national standards shall be withdrawn at the latest by April 2003. Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132/WG 1 “Liquid metal, unalloyed and alloyed ingots“ to pre
19、pare the following standard : EN 1780-2, Aluminium and aluminium alloys Designation of alloyed aluminium ingots for remelting, master alloys and castings Part 2 : Chemical symbol based designation system. This document supersedes EN 1780-2:1996 “Aluminium and aluminium alloys Designation of unalloye
20、d and alloyed aluminium ingots for remelting, master alloys and castings Part 2 : Chemical symbol based designation system“. In this revised edition, unalloyed aluminium ingots have been removed from the scope and provisions for unalloyed aluminium ingots have been deleted. The provisions about the
21、writing rules of unalloyed aluminium has been transferred into the revised version of EN 576. This European Standard EN 1780, “Aluminium and aluminium alloys Designation of alloyed aluminium ingots for remelting, master alloys and castings”, comprises of the following parts: Part 1 : Numerical desig
22、nation system Part 2 : Chemical symbol based designation system Part 3 : Writing rules for chemical composition Annex A is normative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aust
23、ria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43 GMT+00:00 2006, Uncontrolled Copy, (c
24、) BSI EN 1780-2:2002 (E) 4 1 Scope This European Standard specifies a chemical symbol based designation system for aluminium alloys and master alloys as specified in the relevant European Standards. It applies to ingots for remelting and to castings. A designation system for unalloyed aluminium is s
25、pecified in EN 576. An alternative numerical designation system is specified in EN 1780-1. Writing rules for chemical composition are specified in EN 1780-3. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative
26、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 undated references
27、 the latest edition of the publication referred to applies (including amendments). EN 575, Aluminium and aluminium alloys Master alloys produced by melting Specifications. EN 1676, Aluminium and aluminium alloys Alloyed ingots for remelting Specifications. EN 1706, Aluminium and aluminium alloys Cas
28、tings Chemical composition and mechanical properties. EN 1780-3:2002, Aluminium and aluminium alloys Designation of alloyed aluminium ingots for remelting, master alloys and castings Part 3 : Writing rules for chemical composition. 3 Basis of codification The designation of aluminium alloys and mast
29、er alloys shall be based on their chemical symbols, usually followed by numbers indicating the nominal content of the considered alloying element. The chemical symbols used shall be those of the international nomenclature (see Annex A). The numbers or figures indicating the nominal content of the al
30、loying element in question shall be based on the chemical composition limits specified in clause 3 of EN 1780-3:2002. Preferably all designations complying with this codification should be put within square brackets, following the five figure designation. If only the chemical symbol based designatio
31、n is used, then it shall have the prefix EN, followed by a blank space, then the letter A representing aluminium and the letter B representing ingots for remelting, or the letter C representing castings, or the letter M representing master alloys. This letter (B, C or M) shall be separated from the
32、following designation by a hyphen. EXAMPLEEN AB-45400 Al Si5Cu3 or EN AB-Al Si5Cu3 The designations currently in use and the corresponding chemical compositions limits are specified in EN 575, EN 1676 and EN 1706. Assignments or revisions of designations shall be approved by Technical Committee CEN/
33、TC 132. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1780-2:2002 (E) 5 4 Rules for the coded designation of aluminium alloys and master alloys 4.1 General An alloy shall be designated by the symbol Al, followed by the symbols of the ma
34、in element or elements. These symbols are usually followed by numbers which express the mass percent contents of the considered elements, in accordance with the rules shown in 4.2. The symbol Al shall be separated by a blank space from the remainder of the designation. When several alloying elements
35、 are deemed to be required in the designation, they shall be arranged in order of decreasing nominal contents. EXAMPLE 1EN AB-Al Si5Cu3 It these contents are equal, the alloying elements shall be arranged in the alphabetical order of the symbols, as specified in Annex A. EXAMPLE 2EN AB-Al Si12CuMgNi
36、 The chemical symbols for alloying elements shall be restricted to a maximum of four elements. EXAMPLE 3EN AB-Al Si12CuMgNi EXAMPLE 4 EN AC-Al Si12CuMgNi EXAMPLE 5 EN AM-Al Sr10Ti1B0,2 4.2 Rules for distinguishing between two alloys of similar composition 4.2.1 General The simplest possible designat
37、ion shall be used. In the case of alloys with similar compositions, the following additional designation shall be used for distinguishing between alloys in decreasing priority: 4.2.2 Distinguishing by nominal content The alloying element shall be distinguished by the nominal content (middle of the r
38、ange) rounded to the nearest integer or, if necessary, to the nearest 0,5, or, for contents less than 1 % to the nearest 0,1. EXAMPLE 1EN AB-Al Si7Mg0,3 EXAMPLE 2 EN AB-Al Si7Mg0,6. 4.2.3 Distinguishing by main impurities The main impurity or impurities shall be added in parentheses. EXAMPLE 1EN AB-
39、Al Si10Mg(Cu) EXAMPLE 2 EN AB-Al Si10Mg(Fe) EXAMPLE 3 EN AB-Al Si9Cu3(Fe)(Zn) Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1780-2:2002 (E) 6 4.2.4 Distinguishing by a suffix If the above provision is not sufficient for differentiating
40、between several alloys, a suffix shall be used : (a), (b), (c), according to the date of registration. This suffix shall consist of a lower case letter placed in parentheses to avoid confusion with the chemical symbols. EXAMPLE 1EN AB-Al Si12(a) EXAMPLE 2 EN AB-Al Si12(b) 4.3 Special application for
41、 master alloys A suffix (A) or (B) shall be used at the end of the chemical designation, according to the level of impurities, i.e.: (A) for master alloy with low level of impurities ; (B) for master alloy with high level of impurities. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43
42、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1780-2:2002 (E) 7 Annex A (normative) International chemical symbols AluminiumAlMolybdenumMo SilverAgSodiumNa BoronBNiobiumNb BerylliumBeNickelNi BismuthBiPhosphorusP CalciumCaLeadPb CadmiumCdRare EarthsRE CeriumCeAntimonySb CobaltCoSiliconSi ChromiumCr
43、TinSn CopperCuStrontiumSr IronFeTitaniumTi GalliumGaVanadiumV LithiumLiZincZn MagnesiumMgZirconiumZr ManganeseMn Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 1780-2:2002 (E) 8 Bibliography 1 EN 576, Aluminium and aluminium alloys Unall
44、oyed aluminium ingots for remelting Specifications. 2 EN 1780-1, Aluminium and aluminium alloys Designation of alloyed aluminium ingots for remelting, master alloys and castings Part 1 : Numerical designation system. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43 GMT+00:00 2006, Unc
45、ontrolled Copy, (c) BSI blank Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:13:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1780-2:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British
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