Bsi bs en 00573 1 2004

BRITISH STANDARD BS EN 573 1 2004 Aluminium and aluminium alloys — Chemical composition and form of wrought products — Part 1 Numerical designation system The European Standard EN 573 1 2004 has the s[.]

BRITISH STANDARD BS EN

573-1:2004

Aluminium and

aluminium alloys —

Chemical composition

and form of wrought

products —

Part 1: Numerical designation system

The European Standard EN 573-1:2004 has the status of a

British Standard

ICS 71.120.10; 77.150.10

12&23<,1*:,7+287%6,3(50,66,21(;&(37$63(50,77('%<&23<5,*+7/$:

This British Standard, was

published under the authority

of the Standards Policy and

Strategy Committee on

18 November 2004

© BSI 18 November 2004

ISBN 0 580 44798 7

National foreword

This British Standard is the official English language version of

EN 573-1:2004 It supersedes BS EN 573-1:1995 which is withdrawn

The UK participation in its preparation was entrusted by Technical Committee NFE/35, Light metals and their alloys, to Subcommittee NFE/35/5, Wrought aluminium and aluminium alloys, which has the responsibility to:

A list of organizations represented on this subcommittee 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 be 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 responsible for its correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

enquiries on the interpretation, or proposals for change, and keep the

UK interests informed;

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 notice displayed in this document indicates when the document was last issued

Amendments issued since publication

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

ICS 71.120.10; 77.150.10 Supersedes EN 573-1:1994

English version

Aluminium and aluminium alloys - Chemical composition and form of wrought products - Part 1: Numerical designation system

Aluminium et alliages d'aluminium - Composition chimique

et forme des produits corroyés - Partie 1 : Système de

désignation numérique

Aluminium und Aluminiumlegierungen - Chemische Zusammensetzung und Form von Halbzeug - Teil 1: Numerisches Bezeichnungssystem

This European Standard was approved by CEN on 26 August 2004

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 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 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2004 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members

Ref No EN 573-1:2004: E

2

Contents

page

Foreword 3

1 Scope 4

2 International registration procedure 4

3 Basis for European designation 4

4 Four-digit numerical system 5

4.1 Alloy groups 5

4.2 1xxx group 5

4.3 2xxx to 8xxx groups 5

5 Registration rules for alloy modifications 6

6 Registration rules for national variations 7

Bibliography 8

EN 573-1:2004 (E)

3

Foreword

This document (EN 573-1:2004) 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 publication of an identical text or by endorsement, at the latest by May 2005, and conflicting national standards shall be withdrawn at the latest by May 2005

This document supersedes EN 573-1:1994 It contains only minor modifications which clarify its technical content without modifying it

This standard is part of set of five standards The other standards deal with:

EN 573-2, Aluminium and aluminium alloys – Chemical composition and form of wrought products –

Part 2: Chemical symbol based designation system.

EN 573-3, Aluminium and aluminium alloys – Chemical composition and form of wrought products –

Part 3: Chemical composition.

EN 573-4, Aluminium and aluminium alloys – Chemical composition and form of wrought products –

Part 4: Forms of products

prEN 573-5, Aluminium and aluminium alloys – Chemical composition and form of wrought products –

Part 5: Codification of standardized wrought products

The wording has been clarified in accordance with the "International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys"

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom

4

1 Scope

This document specifies a European designation system of wrought aluminium and aluminium alloys, based

on an international designation system, and the procedure to obtain such international designation

It is in accordance with the "Recommendation" dated December 15, 1970, as revised in March 2002, for an International Designation System for Wrought Aluminum and Wrought Aluminum Alloys issued by the Aluminum Association, Washington DC 20006, USA

This standard applies to wrought products and to ingots intended to be wrought

2 International registration procedure

All requests for international registration shall be submitted to The Aluminum Association by a signatory of the Declaration of Accord The organization that requests an alloy designation shall therefore comply with the terms of the Declaration of Accord, as stated in the so called “Teal Sheets” edited by The Aluminum Association

3 Basis for European designation

The designation is constituted successively by:

 prefix EN followed by a blank space;

 letter A representing aluminium;

 letter W representing wrought products;

 a hyphen;

 an international designation consisting of four digits, representing the chemical composition and, if required, a letter identifying a national variation; this designation is attributed by the Aluminum Association via the international registration procedure

EXAMPLES EN AW-5052

EN AW-5154A

EN 573-1:2004 (E)

5

4 Four-digit numerical system

The first of the four-digits, in the designation indicates the alloy group as follows:

 aluminium alloys grouped by major alloying elements:

 silicon 4xxx (4 000 series);

NOTE For the purpose of this standard an alloying element is any element which is intentionally added for any purpose other than grain refinement and for which minimum and maximum limits are specified

The designation assigned shall be in the 1xxx group whenever the minimum aluminium content is specified as 99,00 % and greater In the 1xxx group, the last two of the four digits in the designation indicate the minimum aluminium percentage These digits are the same as the two digits to the right of the decimal point in the minimum aluminium percentage, when it is expressed to the nearest 0,01 %

The second digit in the alloy designation indicates alloy modifications in impurity limits or alloying elements If the second digit in the designation is zero, it indicates unalloyed aluminium having natural impurity limits; integers 1 to 9, which are assigned consecutively as needed, indicate special control of one or more individual impurities or alloying elements

4.3 2xxx to 8xxx groups

present in the greatest mean percentage If the greatest mean percentage is common to more than one

In the 2xxx to 8xxx alloy groups the last two of the four digits in the designation have no special significance but serve only to identify the different aluminium alloys in the group

The second digit in the alloy designation indicates the original alloy and alloy modifications If the second figure in the designation is zero, it indicates the original alloy; integers 1 to 9 inclusive, which are assigned consecutively, indicate alloy modifications

6

5 Registration rules for alloy modifications

A modification of the original alloy is limited to any one or a combination of the following:

a) change of not more than the following amounts in the arithmetic mean of the limits for an individual alloying element or combination of elements expressed as an alloying element or both:

Arithmetic mean of limits for alloying elements in original alloy

Maximum change

to determine compliance when maximum and minimum limits are specified for a combination of two or more elements in one alloy composition, the arithmetic mean of such combination is compared to the sum of the mean values of the same individual elements, or any combination thereof, in another alloy composition; b) addition or deletion of not more than one alloying element with limits having an arithmetic mean of not more than 0,30 %, or addition or deletion of not more than one combination of elements expressed as an alloying element with limits having a combined arithmetic mean of not more than 0,40 %;

c) substitution of one alloying element for another element serving the same purpose;

d) change in limits for impurities expressed singly or as a combination;

e) change in limits for grain refining elements;

f) maximum iron or silicon limits, of 0,12 % and 0,10 %, or less, respectively, reflecting high purity base metal

An alloy should not be registered as a modification if it meets the requirements for a national variation (see clause 6)

EN 573-1:2004 (E)

7

6 Registration rules for national variations

National variations of wrought aluminium and wrought aluminium alloys registered by another country in accordance with this Recommendation [1] are identified by a serial letter after the numerical designation The serial letters are assigned in alphabetical sequence starting with A for the first national variation registered, but omitting I, O and Q

A national variation has composition limits which are similar but not identical to those registered by another country, with differences such as:

a) differences in arithmetic mean of limits for an individual alloying element or combination of elements expressed as an alloying element, or both, not exceeding the following amounts:

Arithmetic mean of limits for alloying elements in original alloy

or modification

Maximum difference

to determine compliance when maximum and minimum limits are specified for a combination of two or more elements in one alloy composition, the arithmetic mean of such combination is compared to the sum of the mean values of the same individual elements, or any combination thereof, in another alloy composition;

b) substitution of one alloying element for another element serving the same purpose;

c) different limits for impurities except for low iron Iron maximum of 0,12 % or less, reflecting high purity base metal, should be considered as an alloy modification (see clause 5);

d) different limits on grain refining elements;

e) inclusion of a minimum limit for iron or silicon, or both

An alloy meeting these requirements should not be registered as a new alloy or alloy modification

8

Bibliography

“Teal Sheets”

blank

389 Chiswick High Road

London

W4 4AL

BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter

Revisions

British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions

It is the constant aim of BSI to improve the quality of our products and services

We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover

Tel: +44 (0)20 8996 9000 Fax: +44 (0)20 8996 7400

BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards

Buying standards

Orders for all BSI, international and foreign standards publications should be addressed to Customer Services Tel: +44 (0)20 8996 9001

Fax: +44 (0)20 8996 7001 Email: orders@bsi-global.com Standards are also available from the BSI website at http://www.bsi-global.com

In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested

Information on standards

BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on all its products and services Contact the Information Centre

Tel: +44 (0)20 8996 7111 Fax: +44 (0)20 8996 7048 Email: info@bsi-global.com Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details

of these and other benefits contact Membership Administration

Tel: +44 (0)20 8996 7002 Fax: +44 (0)20 8996 7001

Email: membership@bsi-global.com

Information regarding online access to British Standards via British Standards Online can be found at http://www.bsi-global.com/bsonline

Further information about BSI is available on the BSI website at http://www.bsi-global.com

Copyright

Copyright subsists in all BSI publications BSI also holds the copyright, in the

UK, of the publications of the international standardization bodies Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means – electronic, photocopying, recording or otherwise – without prior written permission from BSI

This does not preclude the free use, in the course of implementing the standard,

of necessary details such as symbols, and size, type or grade designations If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained

Details and advice can be obtained from the Copyright & Licensing Manager Tel: +44 (0)20 8996 7070 Fax: +44 (0)20 8996 7553

Email: copyright@bsi-global.com