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 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 BS EN 876:1995 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 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.) 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 580 25322 Amendments issued since publication Amd No Date Comments BS EN 876:1995 Contents Committees responsible National foreword Foreword Text of EN 876 List of references © BSI 07-1999 Page Inside front cover ii Inside back cover i BS EN 876:1995 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 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 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 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 ii © BSI 07-1999 EUROPEAN STANDARD EN 876 NORME EUROPÉENNE August 1995 EUROPÄISCHE NORM 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 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 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 countries to CEN and its members Ref No EN 876:1995 E EN 876:1995 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 Foreword Scope Normative reference Principle Denominations and symbols Removal of test specimens 5.1 Removal 5.2 Marking 5.3 Heat treatment and/or ageing 5.4 Extraction Machining of test specimens 6.1 Location 6.2 Dimensions 6.3 Surface quality Conditions of testing Test results 8.1 General 8.2 Examination of fracture surfaces Test report Annex A (informative) Test report Figure — Examples of location of test specimens — longitudinal plane section Figure — Examples of location of test specimens — Cross section Table A.1 — Longitudinal tensile test in accordance with EN 876 Page 3 3 3 3 4 4 5 5 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © BSI 07-1999 EN 876:1995 Scope 5.2 Marking 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 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 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) 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 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 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 Denominations and symbols The denominations and symbols to be used for the longitudinal tensile tests are specified in EN 10002-1 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 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 © BSI 07-1999 Figure — Examples of location of test specimens — longitudinal plane section 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 EN 876:1995 5.4.2 Steel Shearing is excluded for thicknesses of more than 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 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 Figure 2a — All-weld metal test specimen for welding consumable classification 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 and the cross-section as shown in Figure In the case where the test specimen is not taken from mid-thickness, the distance from the surfaces, t1, 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 Figure 2b — Test specimen from a joint welded from one side only ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ 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 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 Figure 2c — Test specimen from a joint welded from both sides Figure — Examples of location of test specimens — Cross section Conditions of testing The test specimen shall be loaded gradually and continuously in accordance with EN 10002-1 © BSI 07-1999 EN 876:1995 Test results Test report 8.1 General 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 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 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 ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © BSI 07-1999 EN 876:1995 Annex A (informative) Test report Table A.1 — Longitudinal tensile test in accordance with EN 876 Test specimen number/position Dimension/diameter mm Fp N Fm Rp Rm L0 A Z N N/mm2 N/mm2 mm % % Test Remark temperature e.g fracture appearance °C ｗｗｗ．ｂｚｆｘｗ．ｃｏｍ © BSI 07-1999 BS EN 876:1995 List of references See national foreword © BSI 07-1999 BS EN 876:1995 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the UK view on 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