SANS 51780-2-2008 Aluminium and aluminium alloys - Designation of alloyed aluminium ingots for remelting master alloys and castings Part 2 Chemical symbol based designation system《.pdf

1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

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3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-21501-9 SANS 51780-2:2008Edition 2EN 1780-2:2002Edition 2SOUTH AFRICAN NATIONAL STANDARD Aluminium and aluminium alloys Designation of all

4、oyed aluminium ingots for remelting, master alloys and castings Part 2: Chemical symbol based designation system This national standard is the identical implementation of EN 1780-2:2002 and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by SABS Standards Divisi

5、on 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS SANS 51780-2:2008 Edition 2 EN 1780-2:2002 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee SAB

6、S TC 1078, Engineering materials Non-ferrous metals, in accordance with procedures of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This SANS document was published in September 2008. This SANS document supersedes SABS EN 1780-2:1996 (edition 1). EUROPEAN STANDARD

7、NORME EUROPENNEEUROPISCHE NORMEN 1780-2October 2002ICS 77.150.10 Supersedes EN 1780-2:1996English versionAluminium and aluminium alloys - Designation of alloyedaluminium ingots for remelting, master alloys and castings - Part2: Chemical symbol based designation systemAluminium et alliages daluminium

8、 - Systme dedsignation applicable aux lingots pour refusion enaluminium alli, aux alliages-mres et aux produits mouls- Partie 2: Systme de dsignation bas sur les symboleschimiquesAluminium und Aluminiumlegierungen - Bezeichnung vonlegiertem Aluminium in Masseln, Vorlegierungen undGussstcken - Teil 2

9、 Bezeichnungssystem mitchemischen SymbolenThis 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 EuropeanStandard the status of a national standard without any alteration

10、 Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunde

11、r the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembour

12、g, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2002 CEN All rights of exploitation in any form and by any m

13、eans reservedworldwide for CEN national Members.Ref. No. EN 1780-2:2002 EEN 1780-2:2002 (E)2Contentspage1 Scope 42 Normative references 43 Basis of codification44 Rules for the coded designation of aluminium alloys and master alloys54.1 General54.2 Rules for distinguishing between two alloys of simi

14、lar composition 54.3 Special application for master alloys 6Annex A (normative) International chemical symbols 7Bibliography 8EN 1780-2:2002 (E)3ForewordThis document (EN 1780-2:2002) has been prepared by Technical Committee CEN /TC 132, “Aluminium andaluminium alloys“, the secretariat of which is h

15、eld by AFNOR.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by April 2003, and conflicting national standards shall be withdrawn at the latest byApril 2003.Within its programme of work, Technical Com

16、mittee CEN/TC 132 entrusted CEN/TC 132/WG 1 “Liquid metal,unalloyed and alloyed ingots“ to prepare the following standard :EN 1780-2, Aluminium and aluminium alloys Designation of alloyed aluminium ingots for remelting, master alloysand castings Part 2 : Chemical symbol based designation system.This

17、 document supersedes EN 1780-2:1996 “Aluminium and aluminium alloys Designation of unalloyed andalloyed aluminium ingots for remelting, master alloys and castings Part 2 : Chemical symbol based designationsystem“.In this revised edition, unalloyed aluminium ingots have been removed from the scope an

18、d provisions for unalloyedaluminium ingots have been deleted.The provisions about the writing rules of unalloyed aluminium has been transferred into the revised version ofEN 576.This European Standard EN 1780, “Aluminium and aluminium alloys Designation of alloyed aluminium ingots forremelting, mast

19、er alloys and castings”, comprises of the following parts:Part 1 : Numerical designation systemPart 2 : Chemical symbol based designation systemPart 3 : Writing rules for chemical compositionAnnex A is normative.According to the CEN/CENELEC Internal Regulations, the national standards organizations

20、of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland and the United Kingdom.EN 1780-2:2002 (E)41 ScopeT

21、his European Standard specifies a chemical symbol based designation system for aluminium alloys and masteralloys as specified in the relevant European Standards. It applies to ingots for remelting and to castings.A designation system for unalloyed aluminium is specified in EN 576.An alternative nume

22、rical designation system is specified in EN 1780-1. Writing rules for chemical composition arespecified in EN 1780-3.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate pla

23、ces in the text and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referre

24、d 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 Castings Chemical composition and mechanical propert

25、ies.EN 1780-3:2002, Aluminium and aluminium alloys Designation of alloyed aluminium ingots for remelting, masteralloys and castings Part 3 : Writing rules for chemical composition.3 Basis of codificationThe designation of aluminium alloys and master alloys shall be based on their chemical symbols, u

26、sually followedby 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 alloying element in question shall be based on thechemical

27、 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 fivefigure designation. If only the chemical symbol based designation is used, then it shall have the prefix EN, followedby a b

28、lank space, then the letter A representing aluminium and the letter B representing ingots for remelting, or theletter C representing castings, or the letter M representing master alloys.This letter (B, C or M) shall be separated from the following designation by a hyphen.EXAMPLE EN AB-45400 Al Si5Cu

29、3 or EN AB-Al Si5Cu3The 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/TC 132.EN 1780-2:2002 (E)54 Rules for the coded designation of al

30、uminium alloys and master alloys4.1 GeneralAn alloy shall be designated by the symbol Al, followed by the symbols of the main element or elements. Thesesymbols are usually followed by numbers which express the mass percent contents of the considered elements, inaccordance with the rules shown in 4.2

31、 The symbol Al shall be separated by a blank space from the remainder ofthe designation.When several alloying elements are deemed to be required in the designation, they shall be arranged in order ofdecreasing nominal contents.EXAMPLE 1 EN AB-Al Si5Cu3It these contents are equal, the alloying eleme

32、nts shall be arranged in the alphabetical order of the symbols, asspecified in Annex A.EXAMPLE 2 EN AB-Al Si12CuMgNiThe chemical symbols for alloying elements shall be restricted to a maximum of four elements.EXAMPLE 3 EN AB-Al Si12CuMgNiEXAMPLE 4 EN AC-Al Si12CuMgNiEXAMPLE 5 EN AM-Al Sr10Ti1B0,24.2

33、 Rules for distinguishing between two alloys of similar composition4.2.1 GeneralThe simplest possible designation shall be used.In the case of alloys with similar compositions, the following additional designation shall be used for distinguishingbetween alloys in decreasing priority:4.2.2 Distinguis

34、hing by nominal contentThe alloying element shall be distinguished by the nominal content (middle of the range) rounded to the nearestinteger or, if necessary, to the nearest 0,5, or, for contents less than 1 % to the nearest 0,1.EXAMPLE 1 EN AB-Al Si7Mg0,3EXAMPLE 2 EN AB-Al Si7Mg0,6.4.2.3 Distingui

35、shing by main impuritiesThe main impurity or impurities shall be added in parentheses.EXAMPLE 1 EN AB-Al Si10Mg(Cu)EXAMPLE 2 EN AB-Al Si10Mg(Fe)EXAMPLE 3 EN AB-Al Si9Cu3(Fe)(Zn)EN 1780-2:2002 (E)64.2.4 Distinguishing by a suffixIf the above provision is not sufficient for differentiating between sev

36、eral 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 toavoid confusion with the chemical symbols.EXAMPLE 1 EN AB-Al Si12(a)EXAMPLE 2 EN AB-Al Si12(b)4.3 Special application for master alloysA

37、 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.EN 1780-2:2002 (E)7Annex A(normative)International chemical symbolsAluminium Al Mo

38、lybdenum MoSilver Ag Sodium NaBoron B Niobium NbBeryllium Be Nickel NiBismuth Bi Phosphorus PCalcium Ca Lead PbCadmium Cd Rare Earths RECerium Ce Antimony SbCobalt Co Silicon SiChromium Cr Tin SnCopper Cu Strontium SrIron Fe Titanium TiGallium Ga Vanadium VLithium Li Zinc ZnMagnesium Mg Zirconium Zr

39、Manganese MnEN 1780-2:2002 (E)8Bibliography1 EN 576, Aluminium and aluminium alloys Unalloyed 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. SABSThis s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .