Bsi bs en 00876 1995 (1999)

www bzfxw com BRITISH STANDARD BS EN 876 1995 Destructive tests on welds in metallic materials — Longitudinal tensile test on weld metal in fusion welded joints The European Standard EN 876 1995 has t[.]

BRITISH STANDARD BS EN

876:1995

Destructive tests on

welds in metallic

materials —

Longitudinal tensile

test on weld metal in

fusion welded joints

The European Standard EN 876:1995 has the status of a

British Standard

ICS 25.160.40

This British Standard, having

been prepared under the

direction of the Engineering

Sector Board, was published

under the authority of the

Standards Board and comes

into effect on

15 December 1995

© BSI 07-1999

The following BSI references

relate to the work on this

standard:

Committee reference WEE/2

Draft for comment 92/82868 DC

ISBN 0 580 25322 8

Committees responsible for this British Standard

The preparation of this British Standard was entrusted to Technical Committee WEE/2, Welding tests, upon which the following bodies were represented:

Aluminium Federation Association of Consulting Scientists British Constructional Steelwork Association Ltd

British Iron and Steel Producers’ Association Electricity Association

Health and Safety Executive Institution of Structural Engineers Lloyd’s Register of Shipping Ministry of Defence

Power Generation Contractors’ Association — PGCA (BEAMA Ltd.) TWI

Welding Manufacturers’ Association (BEAMA Ltd.)

Amendments issued since publication

BS EN 876:1995

Contents

Page

ii © BSI 07-1999

National foreword

This British Standard has been prepared by Technical Committee WEE/2 and is

the English language version of EN 876:1995 Destructive tests on welds in

metallic materials — Longitudinal tensile test on weld metal in fusion welded joints published by the European Committee for Standardization (CEN).

EN 876 was produced as a result of international discussions in which the United Kingdom took an active part

EN 876:1995 supersedes tests detailed in BS 709:1983 which will be amended

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.

Cross-reference

Publication referred to Corresponding British Standard

EN 10002-1 BS EN 10002 Tensile testing of metallic materials

Part 1:1990 Method of test at ambient temperature

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, 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

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 876

August 1995

ICS 25.160.40

Descriptors: Welding, fusion welding, welded joints, butt joints, weld metal, destructive tests, tension tests, tests specimen, dimensions

English version Destructive tests on welds in metallic materials —

Longitudinal tensile test on weld metal in fusion

welded joints

Essais destructifs des soudures sur matériaux

métalliques — Essai de traction longitudinale

du métal fondu des assemblages soudés par

fusion

Zerstörende Prüfung von Schweißverbindungen an metallischen Werkstoffen — Längszugversuch an Schweißgut in Schmelzschweißverbindungen

This European Standard was approved by CEN on 1995-07-14 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 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

© 1995 All rights of reproduction and communication in any form and by any means reserved in all

© BSI 07-1999

2

Foreword

This European Standard has been prepared by the

Technical Committee CEN/TC 121, Welding, of

which the secretariat is held by DS

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

February 1996, and conflicting national standards

shall be withdrawn at the latest by February 1996

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 and United Kingdom

Contents

Page

Figure 1 — Examples of location of test specimens — longitudinal plane section 3 Figure 2 — Examples of location of test

Table A.1 — Longitudinal tensile test in

EN 876:1995

1 Scope

This standard specifies the sizes of test specimens

and the test procedure for carrying out longitudinal

tensile tests on cylindrical test specimens in order to

determine the mechanical properties of weld metal

in a fusion welded joint

This standard applies to metallic materials in all

forms of product with joints made by any fusion

welding process, having joint sizes that are

sufficient to obtain cylindrical test specimens with

dimensions in accordance with EN 10002-1

Unless otherwise specified for specific points in this

standard, the general principles of EN 10002-1 shall

apply

2 Normative reference

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 10002-1, Metallic materials — Tensile testing —

Part 1: Method of test (at ambient temperature)

3 Principle

An increasing tensile load is continuously applied

until rupture occurs in a cylindrical test specimen

taken longitudinally from the weld metal in a

welded joint

Unless otherwise specified, the test shall be carried

out at ambient temperature (23 ± 5) °C

4 Denominations and symbols

The denominations and symbols to be used for the

longitudinal tensile tests are specified in

EN 10002-1

5 Removal of test specimens

5.1 Removal

The test specimen shall be removed longitudinally

from the welded joint of the manufactured product

or from the test piece After machining, the parallel

length of the test specimen shall consist only of weld

metal (see Figure 1 and Figure 2)

For the purpose of correctly positioning the test

specimen in the joint, the joint cross-section at both

ends of the test specimen can be macroetched

5.2 Marking

Each test piece shall be marked to identify its exact location in the manufactured product or in the joint from which it has been removed

Each test specimen shall be marked to identify its exact location in the test piece from which it has been removed

When removed from the test piece, each test specimen shall be marked

5.3 Heat treatment and/or ageing

No heat treatment shall be applied to the welded joint or to the test specimen unless it is specified or allowed by the relevant application standard dealing with the welded joint to be tested Details of any heat treatment shall be recorded in the test report If natural ageing of aluminium alloys takes place, the time between welding and testing shall be recorded

NOTE The presence of hydrogen in ferrous weld metals may adversely affect the test results and suitable hydrogen release treatment may be necessary.

5.4 Extraction

5.4.1 General

The mechanical or thermal processes used to extract the test specimen shall not change the properties of the test specimen in any way

Figure 1 — Examples of location of test specimens — longitudinal plane section

5.4.2 Steel

Shearing is excluded for thicknesses of more

than 8 mm If thermal cutting or other cutting

methods which could affect the cut surfaces are used

to cut the test specimen from the welded plate, or

from the test piece, the cuts shall be made at a

distance greater than or equal to 8 mm from the

surfaces of the final parallel length of the test

specimen Thermal cutting shall not be used

parallel to the original surface of the welded plate or

of the test piece

5.4.3 Other metallic materials

Shearing and thermal cutting are excluded and only

machining (e.g sawing and turning) shall be used

6 Machining of test specimens

6.1 Location

Unless otherwise specified in the particular

application standard dealing with the welded joint

under examination, the test specimens shall be

removed from the centre of the weld metal as shown

in Figure 1 and the cross-section as shown in

Figure 2 In the case where the test specimen is not

taken from mid-thickness, the distance from the

surfaces, t 1, shall be recorded (see Figure 2b) In the

case of very thick or double-sided welded joints,

more than one test specimen may be removed at

different locations through the thickness

(see Figure 2c), in which case the distances, t1

and t2, of each test specimen in the joint

cross-section shall be recorded

6.2 Dimensions

Each test specimen shall have circular cross-section,

and its dimensions, expressed as functions of the

diameter d of the parallel length shall conform to

EN 10002-1

It shall have a normal diameter d of 10 mm If this

is not possible, the diameter shall be as large as

possible but not less than 4 mm The actual size

shall be recorded in the test report

The gripped ends of the test specimens shall be

compatible with the tensile testing machine used

6.3 Surface quality

The tolerances specified in EN 10002-1 shall apply

Strain-hardening or excessive heating of the

material shall be avoided

7 Conditions of testing

The test specimen shall be loaded gradually and continuously in accordance with EN 10002-1

Figure 2a — All-weld metal test specimen for welding consumable classification

Figure 2b — Test specimen from a joint welded from one side only

Figure 2c — Test specimen from a joint

welded from both sides Figure 2 — Examples of location of test specimens — Cross section

EN 876:1995

8 Test results

8.1 General

The test results shall be determined in accordance

with EN 10002-1

8.2 Examination of fracture surfaces

After rupture of the test specimen, the fracture

surfaces shall be examined and the existence of any

imperfections that may have adversely affected the

test shall be recorded, including their type, size and

quantity If fish eyes are present, they shall be

recorded and only their central regions shall be

considered as imperfections

9 Test report

The test report shall include the following information in addition to that given in EN 10002-1:

— reference to this standard;

— location of test specimen, sketch if required (see Figure 1 and Figure 2);

— test temperature, if outside the ambient temperature;

— type and dimensions of imperfections observed;

— the diameter d.

An example of a typical test report is given in Annex A

Annex A (informative)

Test report

Table A.1 — Longitudinal tensile test in accordance with EN 876

Test specimen

number/position Dimension/diameter Fp Fm Rp Rm L0 A Z temperature Test e.g fracture Remark

appearance

BS EN 876:1995

© BSI 07-1999

List of references

See national foreword

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