Aluminium and aluminium alloys - Rolled products for cans, closures and lids - Specifications

This document specifies the technical conditions for inspection and delivery, mechanical properties, dimensional tolerances and other requirements for rolled products made from wrought aluminium and wrought aluminium alloys with thicknesses from 0,150 mm to 0,500 mm for manufacturing rigid cans, closures, lids and tabs.

Aluminium und Aluminiumlegierungen - Walzerzeugnisse für Dosen, Verschlüsse und Deckel - Spezifikationen

Dieses Dokument legt die Technischen Lieferbedingungen, die mechanischen Eigenschaften, die Grenzabmaße und Formtoleranzen und andere Anforderungen an Walzerzeugnisse aus Aluminium und Aluminium-Knetlegierungen mit einer Dicke von 0,150 mm bis 0,500 mm fest, die zur Fertigung von starren Dosen, Verschlüssen, Deckeln und Aufreißlaschen eingesetzt werden.

Aluminium et alliages d'aluminium - Produits laminés pour boîtes, capsules rigides et couvercles - Spécifications

Le présent document spécifie les conditions techniques de contrôle et de livraison, les caractéristiques mécaniques, les tolérances dimensionnelles et autres prescriptions pour les produits laminés en aluminium et alliages d’aluminium corroyés d’une épaisseur comprise entre 0,150 mm et 0,500 mm, utilisés pour la fabrication de boîtes rigides, capsules rigides, couvercles et anneaux.

Aluminij in aluminijeve zlitine - Valjani polizdelki za pločevinke, zapirala in pokrove - Specifikacije

General Information

Status
Published
Publication Date
31-Jan-2007
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Feb-2007
Due Date
01-Feb-2007
Completion Date
01-Feb-2007

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SLOVENSKI STANDARD
SIST EN 541:2007
01-februar-2007
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SIST EN 541:1998

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Aluminium and aluminium alloys - Rolled products for cans, closures and lids -
Specifications
Aluminium und Aluminiumlegierungen - Walzerzeugnisse für Dosen, Verschlüsse und
Deckel - Spezifikationen

Aluminium et alliages d'aluminium - Produits laminés pour boîtes, capsules rigides et

couvercles - Spécifications
Ta slovenski standard je istoveten z: EN 541:2006
ICS:
77.150.10 Aluminijski izdelki Aluminium products
SIST EN 541:2007 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 541
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2006
ICS 77.150.10 Supersedes EN 541:1995
English Version
Aluminium and aluminium alloys - Rolled products for cans,
closures and lids - Specifications

Aluminium et alliages d'aluminium - Produits laminés pour Aluminium und Aluminiumlegierungen - Walzerzeugnisse

boîtes, capsules rigides et couvercles - Spécifications für Dosen, Verschlüsse und Deckel - Spezifikationen

This European Standard was approved by CEN on 16 November 2006.

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, Romania,

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 B-1050 Brussels

© 2006 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 541:2006: E

worldwide for CEN national Members.
---------------------- Page: 2 ----------------------
EN 541:2006 (E)
Contents Page

Foreword..............................................................................................................................................................3

1 Scope ......................................................................................................................................................4

2 Normative references ............................................................................................................................4

3 Terms and definitions ...........................................................................................................................4

4 Technical conditions for inspection and delivery..............................................................................5

5 Mechanical properties...........................................................................................................................9

6 Tolerances on dimensions and form.................................................................................................13

7 Surface finish .......................................................................................................................................17

8 Inspection documents.........................................................................................................................18

9 Labelling ...............................................................................................................................................18

10 Packaging .............................................................................................................................................19

11 Arbitration.............................................................................................................................................19

Annex A (normative) List of aluminium and aluminium alloys ....................................................................20

Annex B (normative) Rules for rounding........................................................................................................21

Annex C (informative) Temper designations..................................................................................................22

Annex D (normative) Chemical composition of aluminium alloy EN AW-5006 ..........................................23

Bibliography ......................................................................................................................................................24

---------------------- Page: 3 ----------------------
EN 541:2006 (E)
Foreword

This document (EN 541:2006) 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 June 2007, and conflicting national standards shall be withdrawn at

the latest by June 2007.
This document supersedes EN 541:1995.

Within its programme of work, Technical Committee CEN/TC 132 entrusted CEN/TC 132/WG 7 "Sheet, strip

and plates" to revise EN 541:1995.
The following technical changes have been made:
General: Normative references updated
Table 1: New alloy added — EN AW-5006
Clause 8: Amended
Annex D: Added
Bibliography: Added

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN shall not be held responsible for identifying any or all such patent rights.

CEN/TC 132 affirms it is its policy that in the case when a patentee refuses to grant licences on standardised

standard products under reasonable and not discriminatory conditions, then this product shall be removed

from the corresponding standard.

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, Den-

mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-

bourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzer-

land and United Kingdom.
---------------------- Page: 4 ----------------------
EN 541:2006 (E)
1 Scope

This document specifies the technical conditions for inspection and delivery, mechanical properties,

dimensional tolerances and other requirements for rolled products made from wrought aluminium and wrought

aluminium alloys with thicknesses from 0,150 mm to 0,500 mm for manufacturing rigid cans, closures, lids and

tabs.
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated refer-

ences, only the edition cited applies. For undated references, the latest edition of the referenced document

(including any amendments) applies.
EN 515, Aluminium and aluminium alloys — Wrought products — Temper designations

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

Part 3: Chemical composition

EN 602, Aluminium and aluminium alloys — Wrought products — Chemical composition of semi-finished

products used for the fabrication of articles for use in contact with foodstuff

EN 10002-1, Metallic materials — Tensile testing — Part 1: Method of test at ambient temperature

EN 10204, Metallic products — Types of inspection documents

EN 14242, Aluminium and aluminium alloys — Chemical analysis — Inductively coupled plasma optical emis-

sion spectral analysis

EN 14361, Aluminium and aluminium alloys — Chemical analysis — Sampling from metal melts

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
sheet

flat rolled product of rectangular cross section with uniform thickness, supplied in straight lengths (i.e. flat) with

trimmed edges
3.2
length of sheet
length is always the dimension in the rolling direction
3.3
width of sheet
width is always the dimension at right angles to the rolling direction
NOTE See 6.2.2, Figure 1.
3.4
strip

flat rolled product of rectangular cross section with uniform thickness, supplied in coils usually with trimmed

edges
NOTE Strip is sometimes called “coil”.
---------------------- Page: 5 ----------------------
EN 541:2006 (E)
3.5
master coil
coil produced from one ingot
3.6
inspection lot

consignment, or part thereof, submitted for inspection, comprising products of the same grade or alloy, form,

temper, size, shape, thickness or cross section and processed in the same manner
3.7
sample
one or more products taken from an inspection lot
3.8
specimen

one or more pieces taken from each product in the sample, e.g. for the purpose of producing test pieces

3.9
test piece
piece taken from a specimen and suitably prepared for testing
3.10
test

operation to which the test piece is subjected in order to measure or classify a property

3.11
order document

document or set of documents agreed between the supplier and purchaser at the time of ordering

NOTE An order document can be an order of the purchaser confirmed by the supplier or a quotation of the supplier

confirmed by the purchaser.
4 Technical conditions for inspection and delivery
4.1 Ordering information

The order document shall define the product required and shall contain the following information:

a) type and form of the product:
 form of the product (sheet or strip);
 surface finish (see Clause 7);
 application;
 designation of the aluminium or aluminium alloy in accordance with EN 573-3;
b) metallurgical temper of the material:
 temper designation in accordance with EN 515 (see also Annex C);
 for H1x tempers: delivery in accordance with Table 1 and/or Table 2;

c) number of this standard or a specification number or, where none exists, the properties agreed between

the supplier and purchaser;
d) dimensions of the product, (in millimetres):
 thickness (to three decimal places);
 width;
 length;
---------------------- Page: 6 ----------------------
EN 541:2006 (E)
 internal and external diameters of the coil or reel;
 core size and type;

For the further processing of the sheet, usually one dimension is critical, demanding a tight tolerance. As

the width tolerance is usually the tighter one, the purchaser shall state the critical dimension as the width

of the sheet.

Designation of the sheet dimension shall always be in the following sequence: thickness × width × length.

It is recommended that the width be indicated by a W after the actual dimension if the width is greater

than the length, (see 6.2.2, Figure 1).
EXAMPLE 0,300 mm × 750 mm × 1 000 mm
0,300 mm × 1 000 mm (W) × 750 mm
e) quantity:
 mass, area or number of pieces;
f) any requirements for inspection documents;
g) any special requirements for packaging:
 mass per coil and per packaging unit;
 number of sheets per stack;
 position of coil axis (vertical or horizontal);
 direction of winding (see Clause 10);
 design of pallet;
h) any special requirements agreed between supplier and purchaser:
 marking of products;
 flagging of joints.
4.2 Requirements
4.2.1 Production and manufacturing processes

Unless otherwise specified in the order, the production and manufacturing processes shall be left to the

discretion of the manufacturer. Any changes in the processes for subsequent and similar orders which signifi-

cantly affect the properties of the product, whether or not specified in this standard, shall be agreed by the

purchaser.
4.2.2 Quality control

The supplier shall be responsible for the performance of all inspection and tests required by this European

Standard and/or the particular specification prior to the shipment of the product.

4.2.3 Chemical composition

The chemical composition shall comply with the requirements as specified in EN 573-3 and for alloy

EN AW-5006 as specified in Annex D and EN 602.
4.2.4 Freedom from defects

The product shall be free from defects prejudicial to its suitable and proper use.

---------------------- Page: 7 ----------------------
EN 541:2006 (E)
4.3 Test procedure
4.3.1 Sampling
4.3.1.1 Samples for chemical analysis

Sampling shall be carried out at the time of casting according to EN 14361. The average content of each

sample shall be within the specification for the chemical composition.

NOTE EN 14361 includes criteria for how to determine the number, volume and shape of samples, the time and loca-

tion of sampling and the design and maintenance of the tools, in order to make sure that the average chemical composi-

tion of the sample represents the average chemical composition of the whole melt.

4.3.1.2 Specimens for mechanical testing
4.3.1.2.1 Number of specimens

Unless otherwise specified, at least one specimen shall be taken from each master coil of an inspection lot.

4.3.1.2.2 Location and size

Specimens shall be taken from samples in such a way that it is possible to orientate the test pieces parallel

with the rolling direction (longitudinal direction).

The specimens shall be sufficiently large enough to allow the manufacture of the test pieces necessary to

carry out the required tests and shall include sufficient metal to allow the manufacture of test pieces for any

retests required.
4.3.1.2.3 Identification of specimens

Each specimen shall be marked in such a way that, after removal, it is still possible to identify the product from

which it was taken and its location and orientation.
4.3.1.3 Test pieces for tensile testing
4.3.1.3.1 Number of test pieces

One test piece shall be taken from each specimen for the tensile test. The shapes and dimensions for tensile

test pieces shall comply with EN 10002-1.
4.3.1.3.2 Identification of the test pieces

Each test piece shall be marked in such a manner that it is possible to identify the inspection lot from which it

was taken and if required, its location and orientation in the product.
4.3.1.3.3 Machining

Any machining necessary shall be carried out in such a manner that it does not change the characteristics of

the metal in the test piece.
4.3.1.4 Test pieces for other tests

For any other tests (e.g. earing, thickness or weight of coatings, lubricants) the procedures shall be agreed

between the supplier and purchaser.
---------------------- Page: 8 ----------------------
EN 541:2006 (E)
4.3.2 Test methods
4.3.2.1 Chemical composition

The ranges of application and the accuracy of the test procedure used shall be validated and proved by the

supplier.

In case of a dispute concerning the chemical composition, referee analysis shall be carried out in accordance

with EN 14242.

NOTE For rapid determination of the chemical composition, different spectral analysis methods are used (e.g.

S-OES, XRF, GDOES). For S-OES see EN 14726.
4.3.2.2 Tensile test

The tensile test shall be carried out in accordance with EN 10002-1 on test pieces with a reduced section

12,5 mm wide taken parallel with the rolling direction (longitudinal direction). The elongation shall be meas-

ured on an original gauge length of 50 mm. Mechanical properties after simulated lacquer stoving shall be de-

termined after heat treating the test pieces at 205 °C for 20 min in a laboratory furnace.

For determination of compliance, yield strength and tensile strength values shall be rounded to the nearest

1 MPa and elongation values to the nearest 0,1 % using the rounding rules given in Annex B.

4.3.2.3 Measurement of dimensions

The dimensions shall be measured by measuring instruments that are accurate to 1/5 of the relevant toler-

ance.

All dimensions shall be checked at the ambient temperature of the workshop or laboratory, and, in case of

dispute, at a temperature of (20 ± 2) °C.
4.3.2.4 Earing test (anisotropy)

The earing test shall be carried out either in accordance with the relevant European Standard or as agreed

between the supplier and purchaser.
4.3.2.5 Other tests

If other mechanical or physical tests are required (e.g. thickness of coatings, lubricants), these tests shall be

carried out either in accordance with the relevant European Standards or as agreed between supplier and

purchaser.
4.3.3 Retests
4.3.3.1 Mechanical properties

If any of the test pieces first selected fail to meet the requirements for the mechanical tests, the following pro-

cedure shall be applied:

 If an error is clearly identified, either in the test piece preparation or in the test procedure, then the

corresponding result shall be disregarded and the testing resumed as initially required.

 If this is not the case, then two further specimens shall be taken from the same lot, one being from the

same unit of the product (sheet, strip, etc.) from which the original specimen was taken, unless that piece

of product has been withdrawn by the supplier.

If both test pieces form these additional specimens comply with the requirement, the lot which they represent

shall be deemed to comply with this standard.
---------------------- Page: 9 ----------------------
EN 541:2006 (E)
Should one test piece fail:
 lot shall be deemed not to comply with this standard;

 or, where applicable, the lot may be submitted to additional thermal treatment(s) and then retested as a

new lot.
4.3.3.2 Other properties

The retests of other properties shall be agreed between the supplier and purchaser.

5 Mechanical properties
5.1 Tensile

When ordering materials in the cold rolled condition, the supplier and purchaser shall agree upon delivery ei-

ther in accordance with Table 1 and/or Table 2.

NOTE All sheet and strip conforming to this standard are preferably supplied in the materials and with the mechanical

properties specified in Tables 1 and 2. Materials which are delivered with an uncoated surface are generally coated by the

purchaser (except tab stock). The mechanical properties of these materials can change as a result of stoving conditions

(temperature and time), depending on the temper of the material.

In general, only materials in the cold rolled condition show a significant drop in strength values. In the partially annealed

condition the mechanical properties undergo only minor changes during lacquer stoving and remain within the listed range

after simulated stoving treatment of 205 °C for 20 min.

Processing the material and stability of the final product depends on the mechanical properties after lacquer stoving. Ta-

ble 2, therefore, shows for the “cold rolled” materials of Table 1 and the guaranteed mechanical properties after a simu-

lated stoving treatment of 205 °C for 20 min. This thermal treatment approximates most of the real lacquering conditions in

use today in sheet lacquering and decorating.
5.2 Earing

If required, limiting values for earing shall be agreed between the supplier and purchaser.

---------------------- Page: 10 ----------------------
EN 541:2006 (E)
Table 1 — Mechanical properties
Elonga-
Metal Notes
R R
0,2 tion
m p
Alloy designation Temper thickness Application on
MPa MPa A
50 mm
mm condition
min.max.min.max.min.
closures
H14 0,18 to 0,30 145 185 125 165 2 cold rolled
can bodies
EN AW-3003
partially
H24/ closures
EN AW-Al Mn1Cu
0,18 to 0,30 145 185 115 155 4 annealed
H44 can bodies
lacquered
H16 0,15 to 0,26 160 200 150 190 1 closures cold rolled
partially
H24/
0,18 to 0,30 225 265 175 215 4 can bodies annealed
H44
lacquered
EN AW-3004 partially
H25/ can bodies
EN AW-Al Mn1Mg1 0,18 to 0
...

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