Bsi bs en 00573 1 2004

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BRITISH STANDARD

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

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BS EN
573-1:2004


BS EN 573-1:2004

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 It supersedes BS EN 573-1:1995 which is withdrawn.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

aid enquirers to understand the text;

—

present to the responsible international/European committee any
enquiries on the interpretation, or proposals for change, and keep the
UK interests informed;

—

monitor related international and European developments and
promulgate them in the UK.

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.

This British Standard, was

published under the authority
of the Standards Policy and
Strategy Committee on
18 November 2004

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
Amd. No.
© BSI 18 November 2004

ISBN 0 580 44798 7

Date

Comments


EN 573-1

EUROPEAN STANDARD

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NORME EUROPÉENNE
EUROPÄISCHE NORM

November 2004

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
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36

© 2004 CEN

All rights of exploitation in any form and by any means reserved
worldwide for CEN national Members.

B-1050 Brussels

Ref. No. EN 573-1:2004: E


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EN 573-1:2004 (E)

Contents
page
Foreword..............................................................................................................................................................3
1

Scope ......................................................................................................................................................4

2

International registration procedure....................................................................................................4

3

Basis for European designation...........................................................................................................4

4
4.1
4.2
4.3

Four-digit numerical system.................................................................................................................5
Alloy groups ...........................................................................................................................................5
1xxx group..............................................................................................................................................5
2xxx to 8xxx groups ..............................................................................................................................5

5

Registration rules for alloy modifications...........................................................................................6

6

Registration rules for national variations ...........................................................................................7

Bibliography ........................................................................................................................................................8

2


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EN 573-1:2004 (E)

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.

3

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EN 573-1:2004 (E)

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

4

EN AW-5052
EN AW-5154A


EN 573-1:2004 (E)

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4
4.1

Four-digit numerical system
Alloy groups

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

aluminium 99,00 % and greater



aluminium alloys grouped by major alloying elements:



1xxx (1 000 series);

 copper

2xxx (2 000 series);

 manganese

3xxx (3 000 series);

 silicon

4xxx (4 000 series);



magnesium

5xxx (5 000 series);



magnesium and Silicon

6xxx (6 000 series);



zinc

7xxx (7 000 series);



other elements

8xxx (8 000 series);

unused series

9xxx (9 000 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.

4.2

1xxx group

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

The alloy designation in the 2xxx to 8xxx groups is determined by the alloying element (Mg2Si for 6xxx alloys)
present in the greatest mean percentage. If the greatest mean percentage is common to more than one
alloying element, choice of group will be in order of group sequence Cu, Mn, Si, Mg, Mg2Si, Zn or others.
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.

5


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EN 573-1:2004 (E)

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

Up to 1,0 %

0,15 %

Over 1,0 % up to 2,0 %

0,20 %

Over 2,0 % up to 3,0 %

0,25 %

Over 3,0 % up to 4,0 %

0,30 %

Over 4,0 % up to 5,0 %

0,35 %

Over 5,0 % up to 6,0 %

0,40 %

Over 6,0 %

0,50 %

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).

6


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EN 573-1:2004 (E)

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

Up to 1,0 %

0,15 %

Over 1,0 % up to 2,0 %

0,20 %

Over 2,0 % up to 3,0 %

0,25 %

Over 3,0 % up to 4,0 %

0,30 %

Over 4,0 % up to 5,0 %

0,35 %

Over 5,0 % up to 6,0 %

0,40 %

Over 6,0 %

0,50 %

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.

7


EN 573-1:2004 (E)

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Bibliography

[1]

8

International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought
th
Aluminum Alloys (The Aluminum Association Inc., 900 19 Street, N.W., Washington, D.C. 20006).
“Teal Sheets”.


blank

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BS EN
573-1:2004

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