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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1780-3 : 1997 The E
2、uropean Standard EN 1780-3 : 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 3. Writing r
3、ules for chemical composition Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:11:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1780-3 : 1997 This British Standard, having been prepared under the direction of the Engineering Sector Board, was published under the authority of the Stand
4、ards 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 94/700786 DC ISBN 0 580 27149 8 Amendments issued since publication Amd. No.DateText affected Committees responsible for this Britis
5、h 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 Cou
6、ncil Ministry of Defence Society of Motor Manufacturers and Traders Limited The following bodies were also represented in the drafting of the standard, through sub-committees and panels: British Foundry Association British Investment Casting Trade Association Light Metal Founders Association License
7、d Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:11:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 1780-3 : 1997 BSI 1997i Contents Page Committees responsibleInside front cover National forewordii Foreword2 Text of EN 1780-33 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:11:08 GM
8、T+00:00 2006, Uncontrolled Copy, (c) BSI ii BSI 1997 BS EN 1780-3 : 1997 National foreword This British Standard has been prepared by Technical Committee NFE/35 and is the English language version of EN 1780-3 : 1996, published by the European Committee for Standardization (CEN). Cross-references Pu
9、blication referred toCorresponding British Standard EN 575BS EN 575 : 1996 Aluminium and aluminium alloys. Master alloys produced by melting. Specifications EN 576BS EN 576 : 1996 Aluminium and aluminium alloys. Unalloyed aluminium ingots for remelting. Specifications EN 1676BS EN 1676 : 1970 Specif
10、ication for heaters for tar and bitumen (mobile and transportable) EN 1706BS 1706 : 1990 Method for specifying electroplated coatings of zinc and cadmium on iron and steel BS EN 1780 Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and
11、 castings EN 1780-1Part 1 : 1997 Numerical designation system EN 1780-2Part 2 : 1997 Chemical symbol based designation system 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 front cover, p
12、ages i and ii, the EN title page, pages 2 to 4, an inside back cover and a back cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:11:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r No
13、rmung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN 1780-3 : 1996 E EUROPEAN STANDARDEN 1780-3 NORME EUROPE ENNE EUROPA ISCHE NORM November 1996 ICS 77.150.10 Descriptors: Aluminium, aluminium alloys, ingots, castings, chemical compositio
14、n, writing rules English version Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and castings Part 3: Writing rules for chemical composition Aluminium et alliages daluminium Syste me de de signation applicable aux lingots pour refusio
15、n en aluminium allie ou non allie, aux alliages-me res et aux produits moule s Partie 3: Re gles de criture pour la composition chimique Aluminium und Aluminiumlegierungen Bezeichnung von unlegiertem und legiertem Aluminium in Masseln, Vorlegierungen und Gustu cken Teil 3 : Schreibregeln fu r die ch
16、emische Zusammensetzung 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-date lists and
17、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 responsibili
18、ty 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, Norway, Portu
19、gal, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:11:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 2 EN 1780-3 : 1996 BSI 1997 Foreword This European Standard has been prepared by Technical Committee CEN/TC 132, Aluminium and aluminium
20、 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 1997. Within
21、 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 1780-3Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and castings Par
22、t 3 : Writing rules for chemical composition 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 designation system
23、 EN 1780-2Aluminium and aluminium alloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and castings Part 2 : Chemical symbol based designation system According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countrie
24、s 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 Foreword2 1Scope3 2Normative references3 3Chemical composition
25、 limits3 4Writing rules3 5Alloy designations3 6Sequence of elements3 7Rounding rules for determination of compliance3 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:11:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Page 3 EN 1780-3 : 1996 BSI 1997 1 Scope This Part of EN 1780 specifies the
26、 writing rules for chemical composition of unalloyed aluminium, aluminium alloys and master alloys. It applies to ingots for remelting and to castings. The five-figure numerical and the chemical symbol based designation systems of materials are specified in EN 1780-1 and EN 1780-2, respectively. 2 N
27、ormative references This European Standard incorporates by dated or undated reference, provisions from other publications. These 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
28、 of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 575Aluminium and aluminium alloys Master alloys produced by melting Specifications EN 576Aluminium
29、 and aluminium alloys Unalloyed aluminium ingots for remelting Specifications EN 1676Aluminium and aluminium alloys Alloyed aluminium ingots for remelting Specifications prEN 1706Aluminium and aluminium alloys Castings Chemical composition and mechanical properties EN 1780-1Aluminium and aluminium a
30、lloys Designation of unalloyed and alloyed aluminium ingots for remelting, master alloys and castings Part 1 : Numerical designation system EN 1780-2Aluminium and aluminium alloys Designation of unalloyed aluminium, aluminium alloys and master alloys for remelting and castings Part 2 : Chemical symb
31、ol based designation system 3 Chemical composition limits The chemical composition limits are specified in EN 575, EN 576, EN 1676 and prEN 1706. 4 Writing rules 4.1 Standard limits for alloying elements and impurities are generally expressed in percentage by mass to the following places (except in
32、certain cases as specified in the standards listed in clause 3): a)less than 0,001 %0,000X; b)0,001 % through less than 0,01 % 0,00X; c)0,01 % through less than 0,10 % refined aluminium0,0XX; others0,0X; d)0,10 through 0,55 %0,XX; e)over 0,55 %0,X; X,X; XX,X. 4.2 The aluminium content for refined al
33、uminium is the difference between 100,00 % and the sum of all other metallic elements present in amounts of 0,0010 % or more each, expressed to the third decimal before determining the sum, which is rounded to the second decimal before subtracting. The aluminium content for unalloyed aluminium not m
34、ade by a refining process is the difference between 100,00 % and the sum of all other metallic elements present in amounts of 0,010 % or more each expressed to the second decimal before determining the sum. 5 Alloy designations Both the five figure based designations and the chemical symbol based de
35、signations are used in the tables appended to the specific European Standards (see clause 3). 6 Sequence of elements Standards limits for alloying elements and impurities are expressed in the following sequence: Silicon, Iron, Copper, Manganese, Magnesium, Chromium, Nickel, Zinc . Titanium, Other El
36、ements each, Other Elements total, Aluminium. Additional specified elements having limits are inserted in alphabetical order of their chemical symbols between zinc and titanium, or are specified in footnotes. Aluminium is specified as a minimum for unalloyed aluminium and as a remainder for aluminiu
37、m alloys. 7 Rounding rules for determination of compliance In recording chemical analysis test results, the number representing the result for any element specified in this standard shall be expressed to the same number of decimal places as the corresponding number in the reference standard. For una
38、lloyed aluminium, the aluminium content is derived as described in 4.2. The following rounding rules shall be used for determination of compliance with this standard : a) when the figure immediately after the last figure to be retained is less than 5, the last figure to be retained remains unchanged
39、 ; b) when the figure immediately after the last figure to be retained is greater than 5, or equal to 5 and followed by at least one figure other than zero, the last figure to be retained is increased by one ; c) when the figure immediately after the last figure to be retained is equal to 5 and foll
40、owed by zeros only, the last figure to be retained remains unchanged if even and is increased by one if odd. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:11:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4blank Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:11:08 GMT+00:00 200
41、6, Uncontrolled Copy, (c) BSI BSI 1997 BS EN 1780-3 : 1997 List of references See national foreword. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:11:08 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | |
42、 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing
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