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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1780-2 : 1997 The E
2、uropean Standard EN 1780-2 : 1996 has the status of a British Standard ICS 77.150.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and castings Part 2. Chemical
3、symbol based designation system Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1780-2 : 1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Sta
4、ndards Board and comes into effect on 15 May 1997 BSI 1997 The following BSI references relate to the work on this standard: Committee reference NFE/35 Draft for comment 95/700785 DC ISBN 0 580 27152 8 Amendments issued since publication Amd. No.DateText affected Committees responsible for this Brit
5、ish Standard The preparation of this British Standard was entrusted to Technical Committee NFE/35, Light metals and their alloys, upon which the following bodies were represented: Aluminium Federation Aluminium Stockholders Association Association of Light Alloy Refiners Limited Magnesium Industry C
6、ouncil Ministry of Defence The following bodies were also represented in the drafting of the standard, through sub-committees and panels: Association of British Welded Aluminium Tube Makers British Foundry Association British Investment Casting Trade Association Institution of Structural Engineers L
7、ight Metal Founders Association Metal Packaging Manufacturers Association Society of Motor Manufacturers and Traders Limited Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1780-2 : 1997 BSI 1997i Contents Page Committees responsibleIn
8、side front cover National forewordii Foreword2 Text of EN 1780-23 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 1997 BS EN 1780-2 : 1997 National foreword This British Standard has been prepared by Technical Committee NFE/35 and is
9、the English language version of EN 1780-2 : 1996, published by the European Committee for Standardization (CEN). Cross-references Publication referred toCorresponding British Standard BS EN 1780 Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, maste
10、r alloys and castings EN 1780-1Part 1 : 1997 Numerical designation system EN 1780-3Part 3 : 1997 Writing rules for chemical compositions Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside fro
11、nt cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komi
12、tee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 1780-2 : 1996 E EUROPEAN STANDARDEN 1780-2 NORME EUROPE ENNE EUROPA ISCHE NORM November 1996 ICS 77.150.10 Descriptors: Aluminium, aluminium alloys, ingots, castings, designat
13、ion, chemical symbols English version Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and castings Part 2: Chemical symbol based designation system Aluminium et alliages daluminium Syste me de de signation applicable aux lingots pour
14、refusion en aluminium allie ou non allie , aux alliages-me res et aux produits moule s Partie 2 : Syste me de de signation base sur les symboles chimiques Aluminium und Aluminiumlegierungen Bezeichnung von unlegiertem und legiertem Aluminium in Masseln, Vorlegierungen und Gustu cken Teil 2 : Bezeich
15、nungssystem mit chemischen Symbolen This European Standard was approved by CEN on 1996-10-26. 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-dat
16、e 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 official versions (English, French, German). A version in any other language made by translation under the
17、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, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, N
18、orway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 1780-2 : 1996 BSI 1997 Foreword This European Standard has been prepared by Technical Committee CEN/TC 132, Aluminium a
19、nd aluminium alloys, the secretariat of which is held by AFNOR. 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 May 1997, and conflicting national standards shall be withdrawn at the latest by May
20、 1997. Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132/WG 1, Liquid metal, unalloyed and alloyed ingots, to prepare the following standard : EN 1780-2Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys an
21、d castings Part 2 : Chemical symbol based designation system This standard is a Part of EN 1780 which is in three parts. The other parts are : EN 1780-1Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and castings Part 1 : Numerical de
22、signation system EN 1780-3Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and castings Part 3 : Writing rules for chemical composition According to the CEN/CENELEC Internal Regulations, the national standards organizations of the foll
23、owing countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3B
24、asis of codification3 4Rules for the coded designation of unalloyed aluminium3 5Rules for the coded designation of aluminium alloys and master alloys3 Annex A(normative) International chemical symbols5 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontrolled Copy,
25、 (c) BSI Page 3 EN 1780-2 : 1996 BSI 1997 1 Scope This part of EN 1780 specifies a code of designation applicable to unalloyed aluminium, aluminium alloys and master alloys as specified in the relevant European Standards. It is a descriptive code based primarily on chemical symbols. It applies to in
26、gots for remelting and to castings. 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. T
27、hese 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 und
28、ated references the latest edition of the publication referred to applies. EN 1780-1Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting and castings Part 1 : Numerical designation system EN 1780-3Aluminium and aluminium alloys Designation of unalloyed a
29、nd alloyed aluminium ingots for remelting and castings Part 3 : Writing rules for chemical composition 3 Basis of codification 3.1 The designations of aluminium, aluminium alloys and master alloys are based on their chemical symbols, usually followed by numbers indicating the purity of aluminium or
30、nominal content of the considered alloying element. 3.2 The chemical symbols used are those of the international nomenclature (see annex A). 3.3 The numbers or figures indicating the purity of aluminium, or the nominal content of the alloying element in question, are based on the chemical compositio
31、n limits specified in clause 3 of EN 1780-3. 3.4 Preferably all designations complying with this codification should be put within square brackets, following the five figure designation. If only the chemical symbol based designation is used, then it shall have the prefix EN, followed by a blank spac
32、e, then the letter A representing aluminium and the letter B identifying ingots for remelting, or the letter C identifying castings, or the letter M identifying master alloys. This letter (B, C or M) shall be separated from the following designation by a hyphen. EXAMPLES : EN AB-45400 Al Si5Cu3 or E
33、N AB-Al Si5Cu3 3.5 The designations currently in use and the corresponding chemical compositions limits are specified in the standards listed in clause 3 of EN 1780-3. 3.6 Assignments or revisions of designations shall be approved by Technical Committee CEN/TC132. 4 Rules for the coded designation o
34、f unalloyed aluminium 4.1 The designation for unalloyed aluminium shall consist of the international chemical symbol of the metal (Al) followed by the percentage purity expressed to one or two decimal places, as necessary. EXAMPLE : EN AB-Al 99,80 The symbol Al is separated by a blank space from the
35、 percentage purity. 4.2 Special use A letter suffix following the first decimal may be used. It characterizes : either a specific application : letter E for electrical applications. EXAMPLE : EN AB-Al 99,7 E : or the chronological order of registration : letters A, B, C . (except E, I, O, Q). EXAMPL
36、ES : EN AB-Al 99,7 A EN AB-Al 99,7 B 5 Rules for the coded designation of aluminium alloys and master alloys 5.1 An alloy shall be designated by the symbol Al, followed by the symbols of the main element or elements. These symbols are usually followed by numbers which express the mass percent conten
37、ts of the considered elements, in compliance with the rules shown in 5.2. The symbol Al shall be separated by a blank space from the remaider of the designation. 5.1.1 When several alloying elements are deemed to be required in the designation, they shall be arranged in order of decreasing nominal c
38、ontents. EXAMPLE : EN AB-Al Si5Cu3 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 4 EN 1780-2 : 1996 BSI 1997 5.1.2 If these contents are equal, the alloying elements shall be arranged in the alphabetical order of the symbols, as shown
39、 in annex A. EXAMPLE : EN AB-Al Si12CuMgNi 5.1.3 The chemical symbols for alloying elements shall be restricted to four elements. EXAMPLES : EN AB-Al Si12CuMgNi EN AC-Al Si12CuMgNi EN AM-Al Sr10Ti1B0,2 5.2 Rules for distinguishing between two alloys of similar composition Care shall be taken to use
40、the simplest possible designation. In the case of alloys with similar compositions, the following additional designation shall be used for distinguishing between alloys. In decreasing priority : 5.2.1 The alloying element shall be distinguished by the nominal content (middle of the range) rounded to
41、 the nearest integer or, if necessary, to the nearest 5/10, or, for contents less than 1 % to the nearest 1/10. EXAMPLES : EN AB-Al Si7Mg0,3 EN AB-Al Si7Mg0,6 5.2.2 The main impurity or impurities shall be added in brackets. EXAMPLES : EN AB-Al Si12(Fe) EN AB-Al Si10Mg(Cu) EN AB-Al Si9Cu3(Fe)(Zn) 5.
42、2.3 If the above provision is not acceptable for differentiating between several alloys, a suffix shall be used : (a), (b), (c)., according to the date of submission to CEN. This suffix shall be placed in parentheses to avoid confusion with the chemical symbols. EXAMPLES : EN AB-Al Si12(a) EN AB-Al
43、Si12(b) 5.3 Special application for 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 sh
44、effieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 5 EN 1780-2 : 1996 BSI 1997 Annex A (normative) International chemical symbols The international chemical symbols are as follows: AluminiumAlMolybdenumMo SilverAgSodiumNa BoronBNiobiumNb BerylliumBeNickelNi BismuthBiP
45、hosphorusP CalciumCaLeadPb CadmiumCdRare EarthsRE CeriumCeAntimonySb CobaltCoSiliconSi ChromiumCrTinSn CopperCuStrontiumSr IronFeTitaniumTi GalliumGaVanadiumV LithiumLiZincZn MagnesiumMgZirconiumZr ManganeseMn Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontroll
46、ed Copy, (c) BSI 6blank Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 1997 BS EN 1780-2 : 1997 List of references See national foreword. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 17 08:47:44 GMT+00:00 2006, Uncontrolled Copy,
47、 (c) BSI BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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