SIST EN ISO 21952:2008
Welding consumables - Wire electrodes, wires, rods and deposits for gas-shielded arc welding of creep-resisting steel - Classification (ISO 21952:2007)
Welding consumables - Wire electrodes, wires, rods and deposits for gas-shielded arc welding of creep-resisting steel - Classification (ISO 21952:2007)
This International Standard specifies requirements for classification of wire electrodes, wires and rods for gas-shielded metal arc welding and tungsten inert-gas welding of creep-resisting steels, and for their deposits in the as-welded or post-weld heat-treated condition. One wire electrode can be tested and classified with different shielding gases. This International Standard is a combined specification providing for classification utilizing a system based upon the chemical composition of wire electrodes, wires and rods with requirements for yield strength and average impact energy of 47 J of all-weld metal, or utilizing a system based upon the tensile strength of the all-weld metal deposits and the chemical composition of wire electrodes, wires and rods. 1) Clauses, subclauses and tables which carry the suffix letter "A" are applicable only to wire electrodes, wires, rods and deposits classified in accordance with the system based upon the chemical composition with requirements for yield strength and the average impact energy of 47 J of all-weld metal deposits under this International Standard. 2) Clauses, subclauses and tables which carry the suffix letter "B" are applicable only to wire electrodes, wires, rods and deposits classified in accordance with the system based upon the tensile strength of all-weld metal deposits and the chemical composition of wire electrodes, wires and rods under this International Standard. 3) Clauses, subclauses and tables which do not have either the suffix letter "A" or the suffix letter "B" are applicable to all wire electrodes, wires, rods and deposits classified under this International Standard.
Schweißzusätze - Drahtelektroden, Drähte, Stäbe und Schweißgut zum Schutzgasschweißen von warmfesten Stählen - Einteilung (ISO 21952:2007)
Diese Internationale Norm legt Anforderungen zur Einteilung von Drahtelektroden, Drähten und Stäben für das Schutzgasschweißen und Wolfram-Inertgasschweißen von warmfesten Stählen fest sowie für ihr Schweißgut im Schweißzustand oder nach einer Wärmebehandlung. Eine Drahtelektrode kann mit unterschiedlichen Schutzgasen geprüft und entsprechend eingeteilt werden.
Diese Internationale Norm benutzt zur Einteilung ein kombiniertes System, das auf der Einteilung nach der chemischen Zusammensetzung der Drahtelektroden, Drähte und Stäbe mit Anforderungen an Streckgrenze und an die durchschnittliche Kerbschlagarbeit des reinen Schweißgutes von 47 J beruht oder auf der Zugfestigkeit des reinen Schweißgutes und der chemischen Zusammensetzung der Drahtelektroden, Drähte und Stäbe.
1) Abschnitte und Tabellen mit dem zusätzlichen Buchstaben A sind nur für Drahtelektroden, Drähte, Stäbe und Schweißgut anwendbar, die nach dem System eingeteilt sind, das auf der chemischen Zusammensetzung mit Anforderungen an Streckgrenze und an die durchschnittliche Kerbschlagarbeit des reinen Schweißgutes von 47 J nach dieser Norm beruht.
2) Abschnitte und Tabellen mit dem zusätzlichen Buchstaben B sind nur für Drahtelektroden, Drähte, Stäbe und Schweißgut anwendbar, die nach dem System eingeteilt sind, das auf der Zugfestigkeit des reinen Schweißgutes und der chemischen Zusammensetzung der Drahtelektroden, Drähte und Stäbe nach dieser Norm beruht.
3) Abschnitte und Tabellen ohne zusätzlichen Buchstaben A oder B sind für alle nach dieser Norm eingeteilten Drahtelektroden, Drähte, Stäbe und Schweißgut anwendbar.
Produits consommables pour le soudage - Fils-électrodes, fils, baguettes et dépôts pour le soudage a l'arc sous gaz de protection des aciers résistant au fluage - Classification (ISO 21952:2007)
L'ISO 21952:2007 spécifie les exigences relatives à la classification des fils-électrodes, des fils et des baguettes pour le soudage à l'arc avec électrode fusible sous protection gazeuse et pour le soudage TIG des aciers résistant au fluage, ainsi que pour les dépôts à l'état brut de soudage ou après traitement thermique après soudage. Un fil-électrode peut être soumis aux essais et classifié en utilisant différents gaz de protection.
L'ISO 21952:2007 propose une spécification mixte permettant une classification utilisant soit un système basé sur la composition chimique des fils-électrodes, des fils et des baguettes, avec des exigences sur la limite d'élasticité et l'énergie de rupture moyenne de 47 J pour le métal fondu hors dilution, soit un système basé sur la résistance à la traction des dépôts de métal fondu hors dilution et la composition chimique des fils-électrodes, des fils et des baguettes.
Dodajni materiali za varjenje - Žice in palice za obločno varjenje v zaščitnih plinih jekel, odpornih proti lezenju - Razvrstitev (ISO 21952:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 21952:2008
01-april-2008
'RGDMQLPDWHULDOL]DYDUMHQMHäLFHLQSDOLFH]DREORþQRYDUMHQMHY]DãþLWQLKSOLQLK
MHNHORGSRUQLKSURWLOH]HQMX5D]YUVWLWHY ,62
Welding consumables - Wire electrodes, wires, rods and deposits for gas-shielded arc
welding of creep-resisting steel - Classification (ISO 21952:2007)
Schweißzusätze - Drahtelektroden, Drähte, Stäbe und Schweißgut zum
Schutzgasschweißen von warmfesten Stählen - Einteilung (ISO 21952:2007)
Produits consommables pour le soudage - Fils-électrodes, fils, baguettes et dépôts pour
le soudage a l'arc sous gaz de protection des aciers résistant au fluage - Classification
(ISO 21952:2007)
Ta slovenski standard je istoveten z: EN ISO 21952:2007
ICS:
25.160.20
SIST EN ISO 21952:2008 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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EUROPEAN STANDARD
EN ISO 21952
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2007
ICS 25.160.20 Supersedes EN 12070:1999
English Version
Welding consumables - Wire electrodes, wires, rods and
deposits for gas-shielded arc welding of creep-resisting steel -
Classification (ISO 21952:2007)
Produits consommables pour le soudage - Fils-électrodes, Schweißzusätze - Drahtelektroden, Drähte, Stäbe und
fils, baguettes et dépôts pour le soudage à l'arc sous Schweißgut zum Schutzgasschweißen von warmfesten
protection gazeuse des aciers résistant au fluage - Stählen - Einteilung (ISO 21952:2007)
Classification (ISO 21952:2007)
This European Standard was approved by CEN on 17 October 2007.
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 CEN 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 CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, 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
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21952:2007: E
worldwide for CEN national Members.
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EN ISO 21952:2007 (E)
Contents Page
Foreword.3
2
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EN ISO 21952:2007 (E)
Foreword
This document (EN ISO 21952:2007) has been prepared by Technical Committee ISO/TC 44 "Welding and
allied processes" in collaboration with Technical Committee CEN/TC 121 “Welding” the secretariat of which is
held by DIN.
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 May 2008, and conflicting national standards shall be withdrawn at the
latest by May 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12070:1999.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 21952:2007 has been approved by CEN as a EN ISO 21952:2007 without any modification.
3
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INTERNATIONAL ISO
STANDARD 21952
First edition
2007-11-15
Welding consumables — Wire electrodes,
wires, rods and deposits for gas-shielded
arc welding of creep-resisting steels —
Classification
Produits consommables pour le soudage — Fils-électrodes, fils,
baguettes et dépôts pour le soudage à l'arc sous protection gazeuse
des aciers résistant au fluage — Classification
Reference number
ISO 21952:2007(E)
©
ISO 2007
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ISO 21952:2007(E)
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ii © ISO 2007 – All rights reserved
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ISO 21952:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Classification. 2
4 Symbols and requirements. 2
4.1 Symbol for the product/process . 2
4.2 Symbol for the chemical composition of wire electrodes, wires and rods . 2
4.3 Symbol for the mechanical properties of all-weld metal . 3
4.4 Symbol for shielding gas . 3
4.5 Rounding-off procedure. 3
5 Mechanical tests . 10
5.1 Preheating and interpass temperatures.10
5.2 Welding conditions and pass sequence . 10
6 Chemical analysis. 11
7 Retests . 11
8 Technical delivery conditions . 11
9 Examples of designations . 11
Bibliography . 14
© ISO 2007 – All rights reserved iii
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ISO 21952:2007(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 21952 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 3, Welding consumables.
Requests for official interpretations of any aspect of this International Standard should be directed to the
Secretariat of ISO/TC 44/SC 3 via your national standards body. A listing of these bodies can be found at
http://www.iso.org.
iv © ISO 2007 – All rights reserved
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ISO 21952:2007(E)
Introduction
This International Standard provides a classification in order to designate wire electrodes, wires and rods in
terms of their chemical composition and, where required, in terms of the yield strength, tensile strength and
elongation of the all-weld metal deposit. The ratio of yield to tensile strength of weld metal is generally higher
than that of parent metal. Users should note that matching weld metal yield strength to parent metal yield
strength will not necessarily ensure that the weld metal tensile strength matches that of the parent material.
Where the application requires matching tensile strength, therefore, selection of the consumable should be
made by reference to column 4 of Table 2.
It should be noted that the mechanical properties of all-weld metal test pieces used to classify the electrodes,
wires and rods will vary from those obtained in production joints because of differences in welding procedure
such as electrode size, width of weave, welding position and material composition.
This International Standard was prepared in collaboration with the International Institute of Welding. It
recognizes that there are two somewhat different approaches in the global market to classifying a given wire
electrode, wire, rod or deposit, and allows for either or both to be used to suit a particular market need.
Application of either type of classification designation (or of both where suitable) identifies a product as
classified in accordance with this International Standard. The classification in accordance with system A is
mainly based on EN 12070:1999. The classification in accordance with system B is mainly based upon
standards used around the Pacific Rim. Future revisions will aim to merge the two approaches into a single
classification system.
© ISO 2007 – All rights reserved v
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INTERNATIONAL STANDARD ISO 21952:2007(E)
Welding consumables — Wire electrodes, wires, rods and
deposits for gas-shielded arc welding of creep-resisting
steels — Classification
1 Scope
This International Standard specifies requirements for classification of wire electrodes, wires and rods for
gas-shielded metal arc welding and tungsten inert-gas welding of creep-resisting steels, and for their deposits
in the as-welded or post-weld heat-treated condition. One wire electrode can be tested and classified with
different shielding gases.
This International Standard is a combined specification providing for classification utilizing a system based
upon the chemical composition of wire electrodes, wires and rods with requirements for yield strength and
average impact energy of 47 J of all-weld metal, or utilizing a system based upon the tensile strength of the
all-weld metal deposits and the chemical composition of wire electrodes, wires and rods.
1) Clauses, subclauses and tables which carry the suffix letter “A” are applicable only to wire electrodes,
wires, rods and deposits classified in accordance with the system based upon the chemical
composition with requirements for yield strength and the average impact energy of 47 J of all-weld
metal deposits under this International Standard.
2) Clauses, subclauses and tables which carry the suffix letter “B” are applicable only to wire electrodes,
wires, rods and deposits classified in accordance with the system based upon the tensile strength of
all-weld metal deposits and the chemical composition of wire electrodes, wires and rods under this
International Standard.
3) Clauses, subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B”
are applicable to all wire electrodes, wires, rods and deposits classified under this International
Standard.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 31-0:1992, Quantities and units — Part 0: General principles
ISO 544, Welding consumables — Technical delivery conditions for welding filler materials — Type of product,
dimensions, tolerances and markings
ISO 4063, Welding and allied processes — Nomenclature of processes and reference numbers
ISO 13916, Welding — Guidance on the measurement of preheating temperature, interpass temperature and
preheat maintenance temperature
ISO 14175, Welding consumables — Gases and gas mixtures for fusion welding and allied processes
© ISO 2007 – All rights reserved 1
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ISO 21952:2007(E)
ISO 14344, Welding and allied processes — Flux and gas shielded electrical welding processes —
Procurement guidelines for consumables
ISO 15792-1, Welding consumables — Test methods — Part 1: Test methods for all-weld metal test
specimens in steel, nickel and nickel alloys
3 Classification
Classification designations are based upon two approaches to indicate the chemical composition of the wire
electrode, wire or rod, and tensile properties and impact properties of the all-weld metal deposits obtained with
a given wire electrode, wire or rod. The two designation approaches include additional designators for some
other classification requirements, but not all, as will be clear from the following clauses. In most cases, a given
commercial product can be classified in accordance with both systems. Then either or both classification
designations can be used for the product.
A wire electrode, wire or rod shall be classified in accordance with its chemical composition as given in
Table 1.
When the wire electrode, wire, rod or deposit is classified in combination with a shielding gas, the
classification shall be prefixed with a symbol in accordance with Clause 4 as appropriate.
3A Classification by chemical composition 3B Classification by tensile strength and
chemical composition
The classification is divided into two parts: The classification is divided into four parts:
1) the first part gives a symbol indicating the 1) the first part gives a symbol indicating the
product/process to be identified; product/process to be identified;
2) the second part gives a symbol indicating the
strength and elongation of the all-weld metal
deposit in the post-weld heat-treated condition
(see Table 2);
3) the third part gives a symbol indicating the
shielding gas used (see 4.4);
2) the second part gives a symbol indicating the 4) the fourth part gives a symbol indicating the
chemical composition of the wire electrode, wire chemical composition of the wire electrode, wire
or rod used (see Table 1). or rod used (see Table 1).
4 Symbols and requirements
4.1 Symbol for the product/process
The symbol for the wire electrode, wire or rod used in the arc welding process shall be the letter G (gas metal
arc welding, process 135, in accordance with ISO 4063) and/or W (tungsten inert-gas welding, process 141, in
accordance with ISO 4063) placed at the beginning of the designation.
4.2 Symbol for the chemical composition of wire electrodes, wires and rods
The symbol in Table 1 indicates the chemical composition of the wire electrode, wire or rod, determined under
the conditions given in Clause 6.
2 © ISO 2007 – All rights reserved
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ISO 21952:2007(E)
4.3 Symbol for the mechanical properties of all-weld metal
4.3A Classification by chemical composition 4.3B Classification by tensile strength and
chemical composition
No symbol shall be used for the mechanical The symbol for the tensile strength of the all-weld
properties of the all-weld metal. The all-weld metal metal deposit produced by the gas-shielded metal
deposit obtained with the wire electrodes, wires and arc welding process and the tungsten inert-gas
rods in Table 1 under the conditions given in welding process shall be 49 for 490 MPa minimum
Clause 5 shall also fulfil the mechanical property tensile strength, 52 for 520 MPa minimum tensile
requirements specified in Table 2. strength, 55 for 550 MPa minimum tensile strength
and 62 for 620 MPa minimum tensile strength. The
complete mechanical property requirements that
shall be fulfilled by the various compositions are
specified in Table 2.
4.4 Symbol for shielding gas
4.4A Classification by chemical composition 4.4B Classification by tensile strength and
chemical composition
No symbol shall be used for the shielding gas. The symbols C and M indicate shielding gas as
described in ISO 14175. No symbol shall be used
for tungsten inert-gas welding when argon shielding
gas as per ISO 14175 is used.
The symbol C shall be used when the classification
has been performed with the shielding gas
ISO 14175 – C1, carbon dioxide.
The symbol M shall be used when the classification
has been performed with the shielding gas
ISO 14175 – M21, but restricted to Ar + 18 % to
25 % CO .
2
The symbol A shall be used when the classification
has been performed with Ar + 1 % to 5 % O . This
2
range of gas mixtures is not described in
ISO 14175.
4.5 Rounding-off procedure
For the purposes of determining compliance with the requirements of this International Standard, the actual
test values obtained shall be subjected to the rounding-off instructions given in ISO 31-0:1992, Annex B,
Rule A. If the measured values are obtained by equipment calibrated in units other than those of this
International Standard, the measured values shall be converted to the units of this International Standard
before rounding off. If an average value is to be compared to the requirements of this International Standard,
rounding off shall be done only after calculating the average. In the case where the testing standard cited in
the normative references of this International Standard contains instructions for rounding off that conflict with
the instructions of this International Standard, the rounding off requirements of the testing standard shall apply.
The rounded-off re
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