Bsi bs en 02004 1 1993 (1999)

BRITISH STANDARD BS EN 2004 1 1993 Test methods for aluminium and aluminium alloy products — Part 1 Determination of electrical conductivity of wrought aluminium alloys The European Standard EN 2004 1[.]

Test methods for

aluminium and

aluminium alloy

products —

Part 1: Determination of electrical

conductivity of wrought aluminium

alloys

The European Standard EN 2004-1:1993 has the status of a

British Standard

UDC 669.715.018.26-4:620.1:537.31:629.7

BS EN 2004-1:1993

This British Standard, having

been prepared under the

direction of the Aerospace

Standards Policy Committee,

was published under the

authority of the Standards

Board and comes

into effect on

15 September 1993

© BSI 08-1999

The following BSI references

relate to the work on this

standard:

Committee reference ACE/24

Draft for comment 91/74925 DC

ISBN 0 580 21079 0

Cooperating organizations

The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries:

Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y

France Association française de normalisation Germany Deutsches Institut für Normung e.V

Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland

Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portuguès da Qualidade Spain Asociación Española de Normalización y Certificación Sweden Standardiseringskommissionen i Sverige

Switzerland Association suisse de normalisation United Kingdom British Standards Institution

Amendments issued since publication

Amd No Date Comments

© BSI 08-1999 i

Contents

Page Cooperating organizations Inside front cover

National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-reference Inside back cover

BS EN 2004-1:1993

National foreword

This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of

EN 2004-1:1992 Aerospace series — Test methods for aluminium and aluminium alloy products — Part 1: Determination of electrical conductivity of wrought aluminium alloys, published by the European Committee for

Standardization (CEN)

EN 2004-1 was produced as a result of international discussions in which the

UK took an active part

A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application

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, pages i and ii, the EN title page, pages 2 to 4, an inside back cover and a back cover

This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover

EUROPÄISCHE NORM July 1993

UDC 669.715.018.26-4:620.1:537.31:629.7

Key words: Aircraft industry, aluminium products, aluminium alloys, rolled products, tests, determination, resistivity

English version

Aerospace series Test methods for aluminium and aluminium

alloy products Part 1: Determination of electrical conductivity of

wrought aluminium alloys

Série aérospatiale

Méthodes d’essais applicables aux produits en

aluminium et alliages d’aluminium

Partie 1: Détermination de la conductivité

électrique des alliages d’aluminium corroyés

Luft- und Raumfahrt Prüfverfahren für Erzeugnisse aus Aluminium und Aluminiumlegierungen

Teil 1: Bestimmung der elektrischen Leitfähigkeit von Aluminium-Knetlegierungen

This European Standard was approved by CEN on 1993-07-23 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,

Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,

Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and

United Kingdom

CEN

European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung

Central Secretariat: rue de Stassart 36, B-1050 Brussels

© CEN 1993 Copyright reserved to CEN members

Ref No EN 2004-1:1993 E

EN 2004-1:1993

© BSI 08-1999

2

Foreword

This European Standard has been prepared by the

European Association of Aerospace Manufacturers

(AECMA)

After inquiries and votes carried out in accordance

with the rules of this Association, this standard has

successively received the approval of the National

Associations and the Official Services of the member

countries of AECMA, prior to its presentation

to CEN

This standard was submitted for Formal Vote, and

the result was positive

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

January 1994, and conflicting national standards

shall be withdrawn at the latest by January 1994

According to the CEN/CENELEC Internal

Regulations, the following countries are bound to

implement this European Standard: Austria,

Belgium, Denmark, Finland, France, Germany,

Greece, Iceland, Ireland, Italy, Luxembourg,

Netherlands, Norway, Portugal, Spain, Sweden,

Switzerland, United Kingdom

Contents

Page

2 Purpose of the test 3

3 Normative references 3

4 Definitions and use of reference blocks 3

5 Unit of conductivity 3

9 Calibration and checks on apparatus 4

Table 1 — Conversion IACS to MS/m 3

© BSI 08-1999 3

1 Scope

This standard specifies a non destructive test

method for the determination of electrical

conductivity of wrought aluminium alloy It is

applicable when referenced

2 Purpose of the test

The test is used to determine:

— the heat treatment condition of products;

— the heat treatment uniformity of batches;

— the heat treatment condition in which some

alloys show the lowest susceptibility to stress

corrosion attack;

— the uniformity of cladding thickness

3 Normative 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

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 2004-7, Aerospace series — Test methods for

aluminium and aluminium alloy products —

Part 7 — Calibration of electrical conductivity

instrumentation1)

4 Definitions and use of reference

blocks

4.1

master reference blocks

blocks of sensibly uniform electrical conductivity the

values of which have been determined and

calibrated in a standardised bridge They shall be

used solely to calibrate and to act as standards for

the preparation of other reference blocks

if such blocks are not yet available, other blocks

shall be used by agreement between the purchaser

and the manufacturer

4.2 secondary reference blocks

blocks of sensibly uniform electrical conductivity calibrated either against a standardised bridge or against master reference blocks such that they may

be used for the calibration of operating reference blocks They shall be used by material

manufacturers and users for the calibration of apparatus for electrical conductivity measurement

to the requirements of this standard

4.3 operating reference blocks

blocks necessary for operation and calibration of apparatus for electrical conductivity measurement The operating reference blocks shall be calibrated at the operating frequency against secondary

reference blocks

5 Unit of conductivity

The unit of electrical conductivity is megasiemens per metre (MS/m)

Measuring instruments shall be calibrated in this unit Where the instrument is scaled differently (e.g % IACS), the instrument manufacturer shall supply to the purchaser the values for conversion to MS/m (see Table 1)

6 Principle

A comparator method by means of an instrument which requires to be calibrated against operating reference blocks of known electrical conductivity

7 Limitations

7.1 Products of less than 1,2 mm thickness

They shall only be tested by agreement between the purchaser and the manufacturer These parties shall jointly define the corrections and acceptance conditions to be applied during testing and acceptance of these products

7.2 Coated products

They shall not be tested unless the coating is insulating and less than 0,01 mm thick

Table 1 — Conversion IACS to MS/m

1) In preparation at the date of publication of this standard.

% IACS 25,9 27,6 29,3 31,0 32,8 34,5 36,2 37,9

% IACS 39,7 41,4 43,1 44,8 46,6 48,3 50,0 51,7

EN 2004-1:1993

8 Apparatus

8.1 The frequency of measuring instruments lies

normally between 2 kHz and 800 kHz

The choice of frequency lies with the purchaser of

the instrument

8.2 Should a multi-range instrument be used, each

range shall be calibrated

8.3 Every time when an instrument is to be used for

determining uniformity of cladding thickness, it

shall be calibrated at the operating frequency

8.4 The reading or measuring instrument shall be so

accurate that the indication can be read to an

accuracy of at least 0,2 MS/m

9 Calibration and checks on apparatus

9.1 The apparatus shall be calibrated to EN 2004-7

9.2 Before measuring and at adequate intervals of

more than 2 h during testing, the apparatus shall be

calibrated against the operating reference blocks

and any necessary correction factor or correction

applied

9.3 Where routine measurement is made over a

limited range of conductivity (3,5 MS/m max.), the

apparatus shall be regularly checked at the high

and low limits of this range using the operating

reference blocks with the same limits

9.4 If the measuring instrument shows a greater

deviation than = 0,3 MS/m from the operating

reference blocks, it shall be re-calibrated and all

parts re-checked

10 Procedure

10.1 Temperature

The apparatus and operating reference blocks shall

be used in conditions of stable temperature and the

product to be tested shall be as near as possible to

this stable temperature

All reference blocks used for measurements shall be

placed in contact with the product under

examination for a period of time sufficient to achieve

a uniform temperature and where possible remain

in contact during the whole test

10.2 Frequency

A frequency of 60 kHz is the most widely used

For sheet thickness 1,2 mm u a u 1,6 mm the

minimum frequency to be used shall be 60 kHz

10.3 Measuring conditions 10.3.1 Unless otherwise stated in the technical specification or design documents, the

measurement shall be made with the probe on a surface which is parallel to the longitudinal direction of the product

10.3.2 During the tests the edges of the test coil or probe shall be at least 8 mm from an edge or a surface discontinuity Tests shall not be made where

an element can influence the reading

10.3.3 Unless otherwise agreed between purchaser and manufacturer, measurements shall be made on surface having a concave radius of

curvature > 500 mm or a convex radius of curvature > 100 mm

10.3.4 The measurement shall be carried out on surfaces with roughness Ra u 10 Èm

For products with surface roughness Ra > 10 Èm:

— the operating reference blocks shall have the same roughness as the product,

or

— the surface area to be tested shall be dressed to

Ra u 10 Èm

10.3.5 Surface cleanliness

All surfaces to be tested shall be clean and free from loose contaminant

10.3.6 Irregular readings

Where local irregular variations in reading are obtained, the presence of small surface flaws may be suspected The surface may be slightly dressed to remove such flaws

If the irregular readings are still displayed at this point, they shall be stated in the test report with the remark «after dressing»

11 Test report

The test report shall include the following:

— reference to this standard;

— results of electrical conductivity measurements in MS/m;

— measuring positions;

— type and reference number of the instrument used

© BSI 08-1999

National annex NA (informative)

Committees responsible

The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/24 upon which the following bodies were represented:

Aluminium Federation

Aluminium Stockholders’ Association

Association of Light Alloy Refiners Limited

BNF Metals Technology Centre

British Forging Industry Association

British Industrial Fasteners Federation

British Investment Casting Trade Association

Institute of British Foundrymen

Light Metal Founders’ Association

Magnesium Industry Council

Ministry of Defence

National Centre of Tribology

Society of British Aerospace Companies Limited

National annex NB (informative)

Cross-reference

There is no British Standard corresponding to EN 2004-7 referred to in the text It is envisaged that a British Standard identical in number and title will be published in due course

BS EN

2004-1:1993

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