EN ISO 13919-2:2001

SLOVENSKI STANDARD
01-maj-2002
Varjenje - Spoji, zvarjeni z elektronskim in laserskim žarkom - Smernice za stopnje
sprejemljivosti napak - 2. del: Aluminij in njegove varive zlitine (ISO 13919-2:2001)
Welding - Electron and laser beam welded joints - Guidance on quality levels for
imperfections - Part 2: Aluminium and its weldable alloys (ISO 13919-2:2001)
Schweißen - Elektronenstrahl- und Laserstrahl-Schweißverbindungen - Richtlinie für
Bewertungsgruppen für Unregelmäßigkeiten - Teil 2: Aluminium und seine
schweißgeeigneten Legierungen (ISO 13919-2:2001)
Soudage - Assemblages soudés par faisceau d'électrons et par faisceau laser - Guide
des niveaux de qualité des défauts - Partie 2: Aluminium et ses alliages soudables (ISO
13919-2:2001)
Ta slovenski standard je istoveten z: EN ISO 13919-2:2001
ICS:
25.160.40 Varjeni spoji in vari Welded joints
77.120.10 Aluminij in aluminijeve zlitine Aluminium and aluminium
alloys
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 13919-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2001
ICS 25.160.00
English version
Welding - Electron and laser beam welded joints - Guidance on
quality levels for imperfections - Part 2: Aluminium and its
weldable alloys (ISO 13919-2:2001)
Soudage - Assemblages soudés par faisceau d'électrons et Schweißen - Elektronenstrahl- und Laserstrahl-
par faisceau laser - Guide des niveaux de qualité des Schweißverbindungen - Richtlinie für Bewertungsgruppen
défauts - Partie 2: Aluminium et ses alliages soudables für Unregelmäßigkeiten - Teil 2: Aluminium und seine
(ISO 13919-2:2001) schweißgeeigneten Legierungen (ISO 13919-2:2001)
This European Standard was approved by CEN on 13 April 2000.
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 Management Centre 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13919-2:2001 E
worldwide for CEN national Members.

Contents
Foreword.3
1 Scope .4
2 Normative references .4
3 Symbols .5
4 Evaluation of welds .5
Annex A (informative).13
Annex ZA (informative).14
Foreword
The text of EN ISO 13919-2:2001 has been prepared by Technical Committee CEN/TC 121 "Welding", the
secretariat of which is held by DS, in collaboration with Technical Committee ISO/TC 44 "Welding and allied
processes".
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 March 2002, and conflicting national standards shall be withdrawn at the latest by
March 2002.
This European Standard has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,
France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,
Switzerland and the United Kingdom.
Introduction
This European standard should be used as a reference in the drafting of application codes and/or for other application
standards. It may be used within a total quality system for the production of satisfactory welded joints. It provides three
sets of dimensional values from which a selection can be made for a particular application. The quality level necessary
in each case should be defined by the application standard or the responsible designer in conjunction with the
manufacturer, user and/or other parties concerned. The level should be prescribed before the start of production,
preferably at the inquiry or order stage. For special purposes, additional details may need to be prescribed.
The quality levels given in this standard are intended to provide basic reference data and are not specifically related to
any particular application. They refer to welded joints and not the complete product or component itself. It is possible,
therefore, for different quality levels to be applied to individual welded joints in the same product or component. Quality
levels are listed in table 1.
Table 1
Quality levels for weld imperfections
Level symbol Quality level
D Moderate
C Intermediate
B Stringent
The three quality levels are arbitrarily identified as D, C and B and are intended to cover the majority of practical
applications.
If higher requirements are made on welds than compatible with the above levels (e.g. for dynamic loading) such welds
may be machined or ground after welding in order to remove surface imperfections.
It would normally be hoped that for a particular welded joint the dimensional limits for imperfections could all be
covered by specifying one quality level. In some cases, however, e.g. for certain types of aluminium or aluminium alloys
and structures as well as for fatigue loading or leak tightness applications it may be necessary to specify different
quality levels for different imperfections in the same welded joint or to include additional requirements.
The choice of quality level for any application should take account of design considerations, subsequent processing,
e.g. surfacing, mode of stressing (e.g. static, dynamic), service conditions (e.g. temperature, environment), and
consequences of failure. Economic factors are also important and should include not only the cost of welding but also
that of inspection, test and repair.
Although this standard includes types of imperfections relevant to the electron and laser beam welding processes, only
those which are applicable to the process and application in question need to be considered.
Imperfections are quoted in terms of their actual dimensions, and their detection and evaluation may require the use of
one or more methods of non-destructive testing. The detection and sizing of imperfections is dependent on the
inspection methods and the extent of testing specified in the application standard or contract.
This standard does not include details of recommended methods of detection and sizing and, therefore, it needs to be
supplemented by requirements for examination, inspection and testing. It should be appreciated that methods of non-
destructive examination may not be able to give the detection, characterisation and sizing necessary for use within
certain types of imperfections shown in table 2.
Although this standard covers material thicknesses (penetration depths) from 1 mm and above for electron and laser
beam welding, it should be noted that the permitted size for all types of imperfection has an absolute, upper limit.
Application for thicknesses above 50 mm for electron beam welding and 12 mm for laser beam welding is, for that
reason, usually safe, but may be overly conservative and may require special precautions, such as weld bead dressing
in order to comply with the limits for reinforcement and undercut. Attention should be paid to such precautions during
approval testing of the welding procedure and alternative requirements may have to be specified, if necessary.
Application for thicknesses below 1 mm is possible, but the requirements may be overly conservative for certain types
of imperfections.
1 Scope
This standard provides guidance on levels of imperfections in electron and laser beam welded joints in aluminium and
its alloys. Three levels are given in such a way as to permit application for a wide range of welded fabrications. The
levels refer to production quality and not to the fitness-for-purpose of the product manufactured.
This standard applies to electron and laser beam welding of:
– aluminium and its alloys;
– all types of welds welded with or without additional filler wire;
– materials equal to or above 1 mm thickness for electron and laser beam welding.
When significant deviations from the joint geometries and dimensions stated in this standard are present in the welded
product, it is necessary to evaluate to what extent the provisions of this standard can apply.
NOTE For circular welds, a lower quality level e.g., may be specified for the fade-out zone.
Metallurgical aspects, e.g. grain size, hardness are not covered by this standard.
2 Normative references
This European Standard incorporates by dat
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