BS EN 875-95.pdf

BRITISH STANDARD

Destructive tests on welds in metallic materials — Impact tests — Test specimen location, notch orientation and examination

The European Standard EN 875:1995 has the status of a British Standard

ICS 25.160.40

BS EN 875: 1995

BS EN 875:1995

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 Assocition [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 03-1999 The following BSI references relate to the work on this standard: Committee reference WEE/2 Draft for comment 92/82867 DC ISBN 0 580 25311 2

Amendments issued since publication Amd. No.

Date

Comments

BS EN 875:1995

Contents Committees responsible National foreword Foreword Text of EN 875 List of references

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Page Inside front cover ii 2 3 Inside back cover

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BS EN 875:1995

National foreword This British Standard has been prepared by Technical Committee WEE/2 and is the English language version of EN 875:1995 Destructive tests on welds in metallic materials — Impact tests — Test specimen location, notch orientation and examination published by the European Committee for Standardization (CEN). EN 875 was produced as a result of international discussions in which the United Kingdom took an active part. BS EN 875:1995 supersedes tests detailed in BS 709:1983 which have been deleted by amendment. Cross-references Publication referred to

Corresponding British Standard

EN 10045-1

BS EN 10045 Charpy impact tests on metallic materials Part 1:1990 Test method (V- and U- notches)

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 10, 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 03-1999

EUROPEAN STANDARD

EN 875

NORME EUROPÉENNE August 1995

EUROPÄISCHE NORM ICS 25.160.40

Descriptors: Welding, welded joints, butt joints, metals, destructive tests, bend tests, impact tests, notch strength, designation

English version

Destructive tests on welds in metallic materials — Impact tests — Test specimen location, notch orientation and examination

Essais destructifs des soudures sur matériaux métalliques — Essai de flexion par choc — Position de l’éprouvette, orientation de l’entaille et examen

Zerstörende Prüfung von Schweißverbindungen an metallischen Werkstoffen — Kerbschlagbiegeversuch — Probenlage, Kerbrichtung und Beurteilung

This European Standard was approved by CEN on 1995-07-01. 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 © 1995 Copyright reserved to CEN members

Ref. No. EN 875:1995 E

EN 875:1995

Foreword This European Standard has been prepared by 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 counries 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 the United Kingdom.

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Contents Foreword 1 Scope 2 Normative reference 3 Principle 4 Method of denomination 4.1 Lettering system 4.2 Characters 4.3 Additional information 5 Examples of denomination 6 Examination 7 Test report Annex A (informative) Test report Figure 1 — Typical examples of denominations Table 1 — Notched face parallel to the surface of the test piece (S position) Table 2 — Notched face perpendicular to the surface of the test piece (T position) Table A.1 — Impact test in accordance with EN 875

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EN 875:1995

1 Scope

4.2 Characters

This standard specifies mainly the method to be used when describing test specimen location and notch orientation for the testing and reporting of impact tests on welded butt joints. This standard applies to impact tests on metallic materials in all forms of product made by any fusion welding process. It is used in addition to EN 10045-1 and includes test specimen denomination and additional reporting requirements.

The denomination comprises the following characters: 1st character

U: Charpy U notch, V: Charpy V notch;

2nd character

W: notch in the weld metal; the reference line is the centre line of the weld at the position of the test specimen, H: notch in the heat affected zone; the reference line is the fusion or the joint line (notch will include HAZ);

3rd character

S: notched face parallel to the surfacea, T: notch through the thickness;

4th character

a: the distance of the centre of the notch from the reference line (if a is at the centre line of the weld, a = 0 which should be recorded);

5th character

b: the distance from the weld joint face sideb to the nearer face of the test specimen (if b is at the surface of the weld, b = 0 which should be recorded).

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 10045-1, Metallic materials — Charpy impact test — Part 1: Test method.

3 Principle Impact testing shall be in accordance with EN 10045-1. The test temperature, location, type and size of test specimen, and notch orientation shall be in accordance with the relevant application standard. In addition to the requirements of EN 10045-1, the notch position may be located by macroetching.

4 Method of denomination 4.1 Lettering system The denomination is based on a lettering system to describe the type, location and notch orientation and a numbering system to show the distance (in millimetres) of the notch from reference lines (RL). The method of denomination is shown in Table 1 and Table 2. The test specimen shall be taken from the welded joint such that its longitudinal axis is at right angles to the weld length.

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a This

orientation is equivalent to the denomination “surface notch” used in fracture mechanics testing. b

In the case of double V, K or similar welds, the face side is the side which contains the larger width of the weld or from which the welding energy was first applied.

4.3 Additional information In cases where this simple denomination does not sufficiently define the location or notch orientation, a sketch referring to the weld procedure should be provided.

5 Examples of denomination Examples of denominations are given in Table 1 and Table 2 and Figure 1.

6 Examination The test specimens designated by this standard shall be tested in accordance with EN 10045-1.

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EN 875:1995

7 Test report The test report shall include the following information in addition to that given in EN 10045-1: — reference to this standard; — test specimen denomination; — sketch if required; — type and dimensions of imperfections observed; — other information as required by the application standard and/or by agreement between the contracting parties. An example of a typical test report is given in Annex A.

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© BSI 03-1999

Table 1 — Notched face parallel to the surface of the test piece (S position) Reference

Centre of the weld

Reference

Fusion/joint line

Denomination

Representation

Denomination

Representation

VWS a/b

VHS a/b (pressure weld)

VHS a/b (Fusion weld)

EN 875:1995

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Reference

Centre of the weld

Reference

Fusion/joint line

Denomination

Representation

Denomination

Representation

VWT O/b

VHT O/b

VWT a/b

VHT a/b

EN 875:1995

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Table 2 — Notched face perpendicular to the surface of the test piece (T position)

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Table 2 — Notched face perpendicular to the surface of the test piece (T position) Reference

Centre of the weld

Reference

Fusion/joint line

Denomination

Representation

Denomination

Representation

VWT O/b

VHT a/b

VWT a/b

VHT a/b

EN 875:1995

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EN 875:1995

Figure 1 — Typical examples of denominations

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EN 875:1995

Annex A (informative) Test report

Table A.1 — Impact test in accordance with EN 875 Test Denomination Type and Test specimen dimension temperature No.

a if

mm

ûC

Impact toughness

Impact absorbed energy

J/cm2

J

Remark

Location of fracturea

Type of fracturea

Type and size of imperfection

required

Examiner or examining body

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Certified by:

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BS EN 875:1995

List of references See national foreword.

© BSI 03-1999

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