CEN EN*87b 95
m 3404589 0335269
946
m BS EN 876 : 1995
BRITISH STANDARD
Destructive tests on welds in metallic materials Longitudinal tensile test on weld metal in fusion welded joints
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The European Standard EN 876 : 1995 has the status of a British Standard
ICs 25.160.40
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CEN EN*87b 95
m 3404589 OLL5270
668
m
BS EN 876 : 1995 --``,````,,,,```,`,```,`,```,,`-`-`,,`,,`,`,,`---
Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee WEE/2, Welding tests, upon which the foliowing 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 Uoyd’s Register of Shipping Ministry of Defence Power Generation Contractors’ Association - PGCA (BEAMA Ltd.) TWI Welding Manufacturers’ Association (BEAMA Ltd.)
under the authorityof the StandardsBoard and comes into effect on 16 December 1996
Amd. No.
Date
Text affected
O BSI 1996
The following BSI references relate to the work on this standard: Committee reference WEE12 Draft for comment 92182868 DC ISBN O 680 26322 8 Copyright European Committee for Standardization Provided by IHS under license with CEN No reproduction or networking permitted without license from IHS
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C E N EN+B76 75 D 3 4 0 4 5 8 9 O l l 5 2 7 l 5 T 4
BS EN 876 : 1996
Contents
page Inside front cover ii 2 3
Committees responsible National foreword Foreword Text of EN 876
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CEN E N t ô 7 b 95
3404589 OLL5272 430
BS EN 876 : 1995
National foreword
This British Standard has been prepared by Technical Committee WEE/Z and is the English language version of EN 876 : 1995Destructive tests on welds in metallic mter2als - Longitudinul tensile test on weld metal inf&on 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. Cross-reference Publicationreferred to
Corresponding British S t a n b d
EN 10002-1
BS EN 10002 5?Imsile testing of metallic materials Part 1 : 1990Method of test at ambient temperature
Compliance with a British Standard does not of itself confer immunity from legai obìigations.
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CEN ENa876 95
3 4 0 4 5 8 9 OLL5273 377 D
EUROPEAN STANDARD
EN 876
NORME EUROPÉENNE EUROPÄISCHE NORM
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 - Langszugversuch an Schweißgut in SchmelzschweiBverbindungen
This European Standard was approved by CEN dn 1995-07-14. CEN members are bound to comply with the CENXENELEC 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
O 1995 All rights of reproduction and communication in any form and by any means reserved in ali countries to CEN and its members Ref. No. EN 876 : 1995 E --``,````,,,,```,`,```,`,```,,`-`-`,,`,,`,`,,`---
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CEN E N * 8 7 b 95 W 3q04589 0115274 203
m e2
EN 876 : 1996
Foreword This European Standard has been prepared by the lèchnical 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
Foreword 1 Scope 2 Normative reference 3 Principle 4 Denominations and symbols Removal of test specimens 5 5.1 5.2 5.3 5.4 6 6.1 6.2 6.3 7 8 8.1 8.2 9
Removal
Marking Heat treatment and/or ageing Extraction Machining of test specimens Location Dimensions Surface quality Conditions of testing Test results General Examination of fracture surfaces %st report Annex A (informative) lèst report
page 2 3 3 3 3 3 3 3 3 4 4 4
4 4
5 5 5 5 5 6
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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 CENKENELEC 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
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CEN E N x ö 7 6 95 W 3404589 0125275 1 4 T
Page 3 EN 876 : 1996
5.2 Marking Each test piece shall be marked to identify its This standard specifies the sizes of test specimens exact location in the manufactured product or in and the test procedure for carrying out longitudinal the joint from which it has been removed. tensile tests on cylindrical test specimens in order Each test specimen shall be marked to identify its to determine the mechanical properties of weld exact location in the test piece from which it has metal in a fusion welded joint. been removed. This standard applies to metallic materials in all When removed from the test piece, each test forms of product with joints made by any fusion specimen shali be marked. welding process, having joint sizes that are sufficient to obtain cylindrical test specimens with 5.3 Heat treatment and/or ageing dimensions in accordance with EN 10002-1. No heat treatment shall be applied to the welded Unless otherwise specified for specific points in this joint or to the test specimen unless it is specified or standard, the general principles of EN 10002-1 allowed by the relevant application standard shall apply. dealing with the welded joint to be tested. Details of any heat treatment shall be recorded in the test 2 Normative reference report. If natural ageing of aluminium alloys takes place, the time between welding and testing shall This European Standard incorporates by dated or be recorded. undated reference, provisions from other NOTE. The presence of hydrogen in femus weld metals may publications. These normative references are cited adversely affect the test results and suitable hydrogen release at the appropriate places in the text and the treatment may be necessary. 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.
1 Scope
EN 10002-1 Metallic materials mil.$ testing h r t 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 f 5) O C .
4 Denominations and symbols
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. Copyright European Committee for Standardization Provided by IHS under license with CEN No reproduction or networking permitted without license from IHS
Figure 1. Examples of location of test specimens longitudinal plane section
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The denominations and symbols to be used for the longitudinal tensile tests are specified in EN 10002-1.
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CEN ENJ87b 95
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Page 4 EN 876 : 1995
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.
5.4.2 Steel
Fignre 2a. All-weld metai test specimen for welding consumable classification
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 l , 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, tl and h, of each test specimen in the joint cross-section shall be recorded.
Figure 2b. l è s t specimen from a joint welded from one side only
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 shail 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.
Figure 2c. Test specimen from a joint welded from both sides
Fïgure 2. Examples of location of test specimens - Cross section
6.3 Surface quality
The tolerances specified in EN 10002-1 shall apply. Strain-hardening or excessive heating of the material shall be avoided.
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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.
CEM EN*87b 95
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EN 876 : 1995
7 Conditions of testing
9 Wst report
The test specimen shall be loaded gradually and continuously in accordance with EN 10002-1.
The test report shail 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 f i i r e 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.
8 Wst 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.
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CEN E N t 8 7 6 95
3404589 OLL5278 959
Page 6 EN 876 : 1995
Annex A (informative) Wst report No.. ........................................
According to According to
WPS ............ test result 'tensile test' test result ' ................'
Manufacturer: ................................................................................................................... Purpose of the examination: ................................................................................................. Form of product: ............................................................................................................... Parent metal: ................................................................................................................... Filler metsu: .....................................................................................................................
1 Isrble A . l Longitudinal tensile test in accordance with EN 876 Dimension/ diameter
FP
A
Z
%st temperature
N
%
%
"C
Examiner or examining body:
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Certified by:
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Remark e.g. fracture appearance
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Bst specimen numbed position
CEN EN*ö7b 95
3404589 O L L 5 2 7 9 895
= BS EN 876 : 1996
List of references
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See national foreword.
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CEN EN*87b 95
3 4 0 4 5 8 9 OLL5280 507
BS EN 876 : 1995
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