SIST EN ISO 16834:2012

Welding consumables - Wire electrodes, wires, rods and deposits for gas-shielded arc welding of high strength steels - Classification (ISO 16834:2012)

This International Standard specifies requirements for classification of wire electrodes, wires, rods and all-weld metal deposits in the as-welded condition and in the post-weld heat-treated (PWHT) condition for gas shielded metal arc welding and tungsten inert-gas welding of high-strength steels with a minimum yield strength greater than 500 MPa, or a minimum tensile strength greater than 570 MPa. 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 yield strength and the average impact energy of 47 J of all-weld metal, or utilizing a system based upon the tensile strength and the average impact energy of 27 J of all-weld metal. e) Clauses, subclauses and tables which carry the suffix letter “A” are applicable only to wire electrodes, wires, rods and deposits classified according to the system based upon the yield strength and the average impact energy of 47 J of all-weld metal under this International Standard. f) Clauses, subclauses and tables which carry the suffix letter “B” are applicable only to wire electrodes, wires, rods and deposits classified according to the system based upon the tensile strength and the average impact energy of 27 J of all-weld metal under this International Standard. g) 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 hochfesten Stählen - Einteilung (ISO 16834:2012)

Diese Internationale Norm legt Anforderungen für die Einteilung von Drahtelektroden, Drähten, Stäben und
Schweißgut im Schweißzustand und nach einer Wärmebehandlung (PWHT) für das Metall-
Schutzgasschweißen und Wolfram-Inertgasschweißen von hochfesten Stählen mit einer Mindeststreckgrenze
über 500 MPa oder einer Mindestzugfestigkeit über 570 MPa fest. Eine Drahtelektrode kann mit
verschiedenen Schutzgasen geprüft und eingestuft werden.
Diese Norm benutzt zur Einteilung ein kombiniertes System, das auf der Einteilung nach der Streckgrenze
und der durchschnittlichen Kerbschlagarbeit des reinen Schweißgutes von 47 J beruht oder nach der
Zugfestigkeit und der durchschnittlichen Kerbschlagarbeit von 27 J.
a) Abschnitte, Unterabschnitte und Tabellen mit dem zusätzlichen Buchstaben „A“ sind nur für
Drahtelektroden, Drähte, Stäbe und Schweißgut anwendbar, die nach dem System eingeteilt sind, das
auf Anforderungen an die Streckgrenze und an die durchschnittliche Kerbschlagarbeit von 47 J des
reinen Schweißgutes nach dieser Internationalen Norm beruht.
b) Abschnitte, Unterabschnitte und Tabellen mit dem zusätzlichen Buchstaben „B“ sind nur für
Drahtelektroden, Drähte, Stäbe und Schweißgut anwendbar, die nach dem System eingeteilt sind, das
auf Anforderungen an die Zugfestigkeit und an die durchschnittliche Kerbschlagarbeit von 27 J des reinen
Schweißgutes nach dieser Internationalen Norm beruht.
c) Abschnitte, Unterabschnitte 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 à l'arc sous protection gazeuse des aciers à haute résistance - Classification (ISO 16834:2012)

L'ISO 16834:2012 spécifie les exigences relatives à la classification des fils-électrodes, des fils, des baguettes et du métal fondu à l'état brut de soudage ou après traitement thermique après soudage (PWHT) pour le soudage à l'arc sous protection gazeuse et le soudage TIG des aciers à haute résistance ayant une limite d'élasticité minimale supérieure à 500 MPa, ou une limite de résistance à la traction de 570 MPa. Un fil-électrode peut être soumis aux essais et classifié en utilisant différents gaz de protection.
L'ISO 16834:2012 propose une spécification mixte permettant une classification utilisant soit un système basé 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 et l'énergie de rupture moyenne de 27 J pour le métal fondu hors dilution.

Dodajni materiali za varjenje - Žične elektrode, žice, palice in čisti vari za varjenje visokotrdnostnih jekel v zaščiti plinov - Razvrstitev (ISO 16834:2012)

Ta mednarodni standard določa zahteve za razvrstitev žičnih elektrod, žic, palic in kovinskih čistih varov v varjenem stanju ali stanju po varjenju s toplotno obdelavo (PWHT) za obločno varjenje v zaščitnih plinih in varjenje po TIG visokotrdnih jekel z mejo prožnosti, večjo od 500 MPa, ali natezno trdnostjo, večjo od 570 MPa. Eno žično elektrodo je mogoče preskušati in razvrstiti v različnih zaščitnih plinih. Ta mednarodni standard je kombinirana specifikacija, ki določa razvrstitev po sistemu, ki temelji na meji prožnosti in povprečni energiji udarca, ki znaša 47 J, za čiste vare, ali po sistemu, ki temelji na natezni trdnosti in povprečni energiji udarca, ki znaša 27 J, za čiste vare. e) Točke, podtočke in preglednice z dodano črko »A« se uporabljajo samo za žične elektrode, žice, palice in vare, ki so razvrščeni po sistemu, ki temelji na meji prožnosti in povprečni energiji udarca, ki znaša 47 J, za čiste vare v skladu s tem mednarodnim standardom. f) Točke, podtočke in preglednice z dodano črko »B« se uporabljajo samo za žične elektrode, žice, palice in vare, ki so razvrščeni po sistemu, ki temelji na natezni trdnosti in povprečni energiji udarca, ki znaša 27 J, za čiste vare v skladu s tem mednarodnim standardom. g) Točke, podtočke in preglednice brez dodane črke »A« ali »B« se uporabljajo za žične elektrode, žice, palice in vare, ki so razvrščeni v skladu s tem mednarodnim standardom.

General Information

• Status: Published
• Public Enquiry End Date: 24-Dec-2010
• Publication Date: 05-Jul-2012
• ICS: 25.160.20 - Welding consumables
• Technical Committee: VAR - Welding
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 05-Jun-2012
• Due Date: 10-Aug-2012
• Completion Date: 06-Jul-2012
• Ref Project: EN ISO 16834:2012 - Welding consumables - Wire electrodes, wires, rods and deposits for gas shielded arc welding of high strength steels - Classification (ISO 16834:2012)

Relations

• Replaces: SIST EN ISO 16834:2007 - Welding consumables - Wire electrodes, wires, rods and deposits for gas-shielded arc welding of high strength steels - Classification (ISO 16834:2006)
• Effective Date: 01-Sep-2012
• Replaces: SIST EN 12534:1999 - Welding consumables - Wire electrodes, wires, rods and deposits for gas shielded metal arc welding of high strength steels - Classification
• Effective Date: 01-Sep-2012
• Replaces: SIST EN ISO 16834:2007 - Welding consumables - Wire electrodes, wires, rods and deposits for gas-shielded arc welding of high strength steels - Classification (ISO 16834:2006)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 16834:2012
01-september-2012
1DGRPHãþD
SIST EN ISO 16834:2007
'RGDMQLPDWHULDOL]DYDUMHQMHäLþQHHOHNWURGHåLFHSDOLFHLQþLVWLYDUL]DYDUMHQMH
YLVRNRWUGQRVWQLKMHNHOY]DãþLWLSOLQRY5D]YUVWLWHY,62
Welding consumables - Wire electrodes, wires, rods and deposits for gas-shielded arc
welding of high strength steels - Classification (ISO 16834:2012)
Schweißzusätze - Drahtelektroden, Drähte, Stäbe und Schweißgut zum
Schutzgasschweißen von hochfesten Stählen - Einteilung (ISO 16834:2012)
Produits consommables pour le soudage - Fils-électrodes, fils, baguettes et dépôts pour
le soudage à l'arc sous protection gazeuse des aciers à haute résistance - Classification
(ISO 16834:2012)
Ta slovenski standard je istoveten z: EN ISO 16834:2012
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
SIST EN ISO 16834:2012 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 16834:2012

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SIST EN ISO 16834:2012


EUROPEAN STANDARD
EN ISO 16834

NORME EUROPÉENNE

EUROPÄISCHE NORM
May 2012
ICS 25.160.20 Supersedes EN ISO 16834:2007
English Version
Welding consumables - Wire electrodes, wires, rods and
deposits for gas shielded arc welding of high strength steels -
Classification (ISO 16834:2012)
Produits consommables pour le soudage - Fils-électrodes, Schweißzusätze - Drahtelektroden, Drähte, Stäbe und
fils, baguettes et dépôts pour le soudage à l'arc sous flux Schweißgut zum Schutzgasschweißen von hochfesten
gazeux des aciers à haute résistance - Classification (ISO Stählen - Einteilung (ISO 16834:2012)
16834:2012)
This European Standard was approved by CEN on 13 April 2012.

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-CENELEC 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-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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, Turkey and United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2012 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 16834:2012: E
worldwide for CEN national Members.

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SIST EN ISO 16834:2012
EN ISO 16834:2012 (E)
Contents Page
Foreword .3

2

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SIST EN ISO 16834:2012
EN ISO 16834:2012 (E)
Foreword
This document (EN ISO 16834:2012) 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 November 2012, and conflicting national standards shall be withdrawn
at the latest by November 2012.
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 ISO 16834:2007.
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, Croatia, 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, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 16834:2012 has been approved by CEN as a EN ISO 16834:2012 without any modification.
3

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SIST EN ISO 16834:2012

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SIST EN ISO 16834:2012

INTERNATIONAL ISO
STANDARD 16834
Second edition
2012-05-01

Welding consumables — Wire electrodes,
wires, rods and deposits for gas shielded
arc welding of high strength steels —
Classification
Produits consommables pour le soudage — Fils-électrodes, fils,
baguettes et dépôts pour le soudage à l'arc sous flux gazeux des aciers
à haute résistance — Classification




Reference number
ISO 16834:2012(E)
©
ISO 2012

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SIST EN ISO 16834:2012
ISO 16834:2012(E)

COPYRIGHT PROTECTED DOCUMENT


©  ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56  CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland

ii © ISO 2012 – All rights reserved

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SIST EN ISO 16834:2012
ISO 16834:2012(E)
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Classification . 2
4 Symbols and requirements . 3
4.1 Symbol for the product/process . 3
4.2 Symbol for strength and elongation properties of all-weld metal . 3
4.3 Symbol for impact properties of all-weld metal . 4
4.4 Symbol for shielding gas . 4
4.5 Symbol for the chemical composition of wire electrodes, wires and rods . 5
4.6 Symbol for condition of post-weld heat treatment . 5
5 Mechanical tests . 9
5.1 Preheating and interpass temperatures . 9
5.2 Welding conditions and pass sequence . 10
5.3 Post-weld heat-treated condition . 10
6 Chemical analysis . 11
7 Rounding procedure . 11
8 Retest . 11
9 Technical delivery conditions . 11
10 Examples of designation . 12
Bibliography . 14

© ISO 2012 – All rights reserved iii

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SIST EN ISO 16834:2012
ISO 16834:2012(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 16834 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 3, Welding consumables.
This second edition cancels and replaces the first edition (ISO 16834:2006), which has been technically
revised.
The main changes compared to the previous edition are:
a) in 4.4, the separation between the A and B side has been eliminated;
b) in Table 3B, the chemical composition has been changed for 4M31 and N5M3;
c) footnote a to Table 3B has been redrafted to give more precision;
d) the designation examples in Clause 10 have been modified.
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 complete listing of these bodies can be
found at www.iso.org.

iv © ISO 2012 – All rights reserved

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SIST EN ISO 16834:2012
ISO 16834:2012(E)
Introduction
This International Standard 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
[1]
accordance with system A is mainly based on EN 12534:1999 . 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 systems into a single classification system.
This International Standard provides a classification for the designation of wire electrodes, wires, rods and
deposits in terms of their chemical composition and, where required, in terms of the yield strength, tensile
strength and elongation of the all-weld metal. The ratio of yield to tensile strength of weld metal is generally
higher than that of the parent metal. Users should note that matching weld metal yield strength to parent metal
yield strength does not necessarily ensure that the weld metal tensile strength matches that of the parent
material. Thus, where the application requires matching tensile strength, selection of the consumable should
be made by reference to column 3 of Table 1A or 1B, as appropriate.
© ISO 2012 – All rights reserved v

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SIST EN ISO 16834:2012

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SIST EN ISO 16834:2012
INTERNATIONAL STANDARD ISO 16834:2012(E)

Welding consumables — Wire electrodes, wires, rods and
deposits for gas shielded arc welding of high strength steels —
Classification
1 Scope
This International Standard specifies requirements for classification of wire electrodes, wires, rods and all-
weld metal deposits in the as-welded condition and in the post-weld heat-treated (PWHT) condition for gas
shielded metal arc welding and tungsten inert-gas welding of high-strength steels with a minimum yield
strength greater than 500 MPa, or a minimum tensile strength greater than 570 MPa. 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 yield strength and the average impact energy of 47 J of all-weld metal, or utilizing a system based
upon the tensile strength and the average impact energy of 27 J of all-weld metal.
e) Clauses, subclauses and tables which carry the suffix letter “A” are applicable only to wire electrodes,
wires, rods and deposits classified according to the system based upon the yield strength and the
average impact energy of 47 J of all-weld metal under this International Standard.
f) Clauses, subclauses and tables which carry the suffix letter “B” are applicable only to wire electrodes,
wires, rods and deposits classified according to the system based upon the tensile strength and the
average impact energy of 27 J of all-weld metal under this International Standard.
g) 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 544, Welding consumables — Technical delivery conditions for filler materials and fluxes — Type of
product, dimensions, tolerances and markings
ISO 13916, Welding — Guidance on the measurement of preheating temperature, interpass temperature and
preheat maintenance temperature
ISO 14175:2008, Welding consumables — Gases and gas mixtures for fusion welding and allied processes
ISO 14344, Welding consumables — Procurement of filler materials and fluxes
ISO 15792-1:2000, Welding consumables — Test methods — Part 1: Test methods for all-weld metal test
specimens in steel, nickel and nickel alloys
ISO 80000-1:2009, Quantities and units — Part 1: General
© ISO 2012 – All rights reserved 1

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SIST EN ISO 16834:2012
ISO 16834:2012(E)
3 Classification
Classification designations are based upon two approaches to indicate the tensile properties and the impact
properties of the all-weld metal 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 is clear
from the following clauses. In most cases, a given commercial product can be classified according to the
classification requirements in 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 in Table 3A or
Table 3B. A weld deposit shall be classified with additional symbols in accordance with the mechanical
properties of its all-weld metal, using a shielding gas from a specific group.
3A Classification by yield strength and 3B Classification by tensile strength and
47 J impact energy 27 J impact energy
The classification is divided into six parts: The classification is divided into five 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 2) the second part gives a symbol indicating the
strength and elongation of all-weld metal (see strength and elongation of the all-weld metal in
Table 1A); either the as-welded or post-weld heat-treated
condition (see Table 1B);
3) the third part gives a symbol indicating the 3) the third part gives a symbol indicating the
impact properties of all-weld metal (see impact properties of all-weld metal in the same
Table 2); condition as specified for the tensile strength
(see Table 2). The letter “U” after this designa-
tor indicates that the deposit meets an average
optional requirement of 47 J at the designated
Charpy test temperature;
4) the fourth part gives a symbol indicating the 4) the fourth part gives a symbol indicating the
shielding gas used (see 4.4); shielding gas used (see 4.4);
5) the fifth part gives a symbol indicating the 5) the fifth 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 3A); or rod used (see Table 3B).
6) the sixth part gives a symbol indicating the
post-weld heat treatment in case this is applied
(see 4.6A).

2 © ISO 2012 – All rights reserved

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SIST EN ISO 16834:2012
ISO 16834:2012(E)
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
shielded metal arc welding) and/or W (gas shielded arc welding with non-consumable tungsten electrode).
4.2 Symbol for strength and elongation properties of all-weld metal

4.2A Classification by yield strength and 4.2B Classification by tensile strength and
47 J impact energy 27 J impact energy
The symbol in Table 1A indicates yield strength, The symbol in Table 1B indicates yield strength,
tensile strength and elongation of the all-weld metal tensile strength and elongation of the all-weld metal
in the as-welded condition determined in in the as-welded condition or in the post-weld heat-
accordance with Clause 5. treated condition determined in accordance with
Clause 5.

Table 1A — Symbol for tensile properties of Table 1B — Symbol for tensile properties of all-
all-weld metal weld metal
(Classification by yield strength (Classification by tensile strength
and 47 J impact energy) and 27 J impact energy)
a
Symbol Minimum Tensile Minimum Minimum Tensile Minimum
Symbol
a b b c
strength strength
yield strength elongation yield strength elongation
MPa MPa % MPa MPa %
59X 490 590 to 790 16
55 550 640 to 820 18
62X 530 620 to 820 15
62 620 700 to 890 18
69X 600 690 to 890 14
69 690 770 to 940 17
76X 680 760 to 960 13
79 790 880 to 1 080 16
78X 680 780 to 980 13
89 890 940 to 1 180 15
83X 745 830 to 1 030 12
a a
For yield strength, the lower yield strength, R , is used  X is “A”, “P” or “AP”; see 4.6B.
eL
when yielding occurs, otherwise the 0,2% proof strength,
b
For yield strength, the lower yield, R , is used when
eL
R , is used.
p
0,2
yielding occurs; otherwise, the 0,2 % proof strength, R , is
p0,2
b
used.
Gauge length is equal to five times the test specimen
diameter.
c
Gauge length is equal to five times the test specimen
diameter.


NOTE Post-weld heat treatment can alter the strength of the weld metal from that obtained in the as-welded condition.
© ISO 2012 – All rights reserved 3

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SIST EN ISO 16834:2012
ISO 16834:2012(E)
4.3 Symbol for impact properties of all-weld metal
4.3A Classification by yield strength and 4.3B Classification by tensile strength
47 J impact energy and 27 J impact energy
The symbol in Table 2 indicates the temperature at The symbol in Table 2 indicates the temperature at
which an impact energy of 47 J is achieved under which an impact energy of 27 J is achieved in the
the conditions given in Clause 5A. Three test as-welded condition or in the post-weld heat-treated
specimens shall be tested. Only one individual value
condition under the conditions given in Clause 5B.
may be lower than 47 J but not lower than 32 J.
Five test specimens shall be tested. The lowest and
highest values obtained shall be disregarded. Two
of the three remaining values shall be greater than
the specified 27 J level, one of the three may be
lower but shall not be less than 20 J. The average of
the three remaining values shall be at least 27 J.
The addition of the optional symbol U, immediately
after the symbol for condition of heat treatment,
indicates that the supplemental requirement of 47 J
impact energy at the normal 27 J impact test
temperature has also been satisfied. For the 47 J
impact requirement, the number of specimens
tested and values obtained shall meet the
requirement of 4.3A.
When an all-weld metal or a welded joint has been classified for a certain temperature, it automatically covers
any higher temperature in Table 2.
Table 2 — Symbol for impact properties of all-weld metal or welded joint
Symbol Temperature for minimum average impact
a,b b
energy of 47 J or 27 J
°C
Z No requirements
a b
+ 20
A or Y
0
0
20
2
3 30
4 40
5
50
6
60
a
See 4.3A.
b
See 4.3B.

4.4 Symbol for shielding gas
The symbols for shielding gases shall be in accordance with ISO 14175:2008, for example:
 The symbol I1 shall be used when the classification has been performed with shielding gas ISO 14175-I1,
100% argon;
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SIST EN ISO 16834:2012
ISO 16834:2012(E)
 The symbol M12, for mixed gases, shall be used when the classification has been performed with
shielding gas ISO 14175-M12, but without helium;
 The symbol M13 shall be used when the classification has been performed with shielding gas
ISO 14175-M13;
 The symbol M20, for mixed gases, shall be used when the classification has been performed with
shielding gas ISO 14175-M20, but without helium;
 The symbol M21, for mixed gases, shall be used when the classification has been performed with
shielding gas ISO 14175-M21, but without helium;
 The symbol C1 shall be used when the classification has been performed with shielding gas
ISO 14175-C1, carbon dioxide;
 The symbol Z is used for an unspecified shielding gas.
4.5 Symbol for the chemical composition of wire electrodes, wires and rods
The symbols in Table 3A or Table 3B indicate the chemical composition of the wire electrode, wire or rod and
includes an indication of characteristic alloying elements.
4.6 Symbol for condition of post-weld heat treatment
4.6A Classification by yield strength and 4.6B Classification by tensile strength and
47 J impact energy 27 J impact energy
The symbol T indicates that strength, elongation and The symbol A shall be added to the classification of
impact properties in the classification of all-weld the weld deposits classified in the as-welded
metal are obtained after a post-weld heat treatment. condition. The symbol P shall be added to the
The post-weld heat-treated condition shall be as classification for weld deposits classified in the
specified in 5.3A. post-weld heat-treated condition. Both symbols AP
shall be added to the classification for weld deposits
classified in both conditions.

© ISO 2012 – All rights reserved 5

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SIST EN ISO 16834:2012
ISO 16834:2012(E)
6 © ISO 2012 – All rights reserved
Table 3A — Symbol for chemical composition
(Classification by yield strength and 47 J impact energy)
Chemical composition,
a,b
% (by mass)
Symbol
(ISO 16834-A)
Total other
C Si Mn P S Ni Cr Mo Cu V
elements
Mn3NiCrMo 0,14 0,60 to 0,80 1,30 to 1,80 0,015 0,018 0,50 to 0,65 0,40 to 0,65 0,15 to 0,30 0,30 0,03 0,25
Mn3Ni1CrMo 0,12 0,40 to 0,70 1,30 to 1,80 0,015 0,018 1,20 to 1,60 0,20 to 0,40 0,20 to 0,30 0,35 0,05 to 0,13 0,25
Mn3Ni1Mo 0,12 0,40 to 0,80 1,30 to 1,90 0,015 0,018 0,80 to 1,30 0,15 0,25 to 0,65 0,30 0,03 0,25
Mn3Ni1,5Mo 0,08 0,20 to 0,60 1,30 to 1,80 0,015 0,018 1,40 to 2,10 0,15 0,25 to 0,55 0,30 0,03 0,25
Mn3Ni1Cu 0,12 0,20 to 0,60 1,20 to 1,80 0,015 0,018 0,80 to 1,25 0,15 0,20 0,30 to 0,65 0,03 0,25
Mn3Ni1MoCu 0,12 0,20 to 0,60 1,20 to 1,80 0,015 0,018 0,80 to 1,25 0,15 0,20 to 0,55 0,30 to 0,65 0,03 0,25
Mn3Ni2,5CrMo 0,12 0,40 to 0,70 1,30 to 1,80 0,015 0,018 2,30 to 2,80 0,20 to 0,60 0,30 to 0,65 0,30 0,03 0,25
Mn4Ni1Mo 0,12 0,50 to 0,80 1,60 to 2,10 0,015 0,018 0,80 to 1,25 0,15 0,20 to 0,55 0,30 0,03 0,25
Mn4Ni2Mo 0,12 0,25 to 0,60 1,60 to 2,10 0,015 0,018 2,00 to 2,60 0,15 0,30 to 0,65 0,30 0,03 0,25
Mn4Ni1,5CrMo 0,12 0,50 to 0,80 1,60 to 2,10 0,015 0,018 1,30 to 1,90 0,15 to 0,40 0,30 to 0,65 0,30 0,03 0,25
Mn4Ni2CrMo 0,12 0,60 to 0,90 1,60 to 2,10 0,015 0,018 1,80 to 2,30 0,20 to 0,45 0,45 to 0,70 0,30 0,03 0,25
Mn4Ni2,5CrMo 0,13 0,50 to 0,80 1,60 to 2,10 0,015 0,018 2,30 to 2,80 0,20 to 0,60 0,30 to 0,65 0,30 0,03 0,25
c
Z Any other agreed composition
a
If not specified: Ti  0,10 % (by mass), Zr  0,10 % (by mass) and Al  0,12 % (by mass). The residual copper content in the steel including any coating shall comply with the stated value.
b
Single values are maximum values.
c
Consumables for which the chemical composition is not listed in this table shall be symbolized similarly and prefixed by the letter Z. The chemical composition ranges are not specified and
therefore it is possible that two electrodes with the same Z classification are not interchangeable.

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SIST EN ISO 16834:2012
ISO 16834:2012(E)
© ISO 2012 – All rights reserved 7
Table 3B — Symbol for chemical composition
(Classification by tensile strength and 27 J impact energy)
Chemical composition
a,b
Symbol
% (by mass)
(ISO 16834-B)
C Si Mn P S Ni Cr Mo Cu Ti
2M3 0,12 0,30 to 0,70 0,60 to 1,40 0,025 0,025 — — 0,40 to 0,65 0,50 —
3M1 0,05 to 0,15 0,40 to 1,00 1,40 to 2,10 0,025 0,025 — — 0,10 to 0,45 0,50 —
3M1T 0,12 0,40 to 1,00 1,40 to 2,10 0,025 0,025 — — 0,10 to 0,45 0,50 0,02 to 0,30
3M3 0,12 0,60 to 0,90 1,10 to 1,60 0,025 0,025 — — 0,40 to 0,65 0,50 —
3M31 0,12 0,30 to 0,90 1,00 to 1,85 0,025 0,025 — — 0,40 to 0,65 0,50 —
3M3T 0,12 0,40 to 1,00 1,00 to 1,80 0,025 0,025 — — 0,40 to 0,65 0,50 0,02 to 0,30
4M3 0,12 0,30 1,50 to 2,00 0,025 0,025 — — 0,40 to 0,65 0,50 —
4M31 0,07 to 0,12 0,50 to 0,80 1,60 to 2,10 0,025 0,025 — — 0,40 to 0,60 0,50 —
4M3T 0,12 0,50 to 0,80 1,60 to 2,20 0,025 0,025 — — 0,40 to 0,65 0,50 0,02 to 0,30
N1M2T 0,12 0,60 to 1,00 1,70 to 2,30 0,025 0,025 0,40 to 0,80 — 0,20 to 0,60 0,50 0,02 to 0,30
N1M3 0,12 0,20 to 0,80 1,00 to 1,80 0,025 0,025 0,30 to 0,90 — 0,40 to 0,65 0,50 —
N2M1T 0,12 0,30 to 0,80 1,10 to 1,90 0,025 0,025 0,80 to 1,60 — 0,10 to 0,45 0,50 0,02 to 0,30
N2M2T 0,05 to 0,15 0,30 to 0,90 1,00 to 1,80 0,025 0,025 0,70 to 1,20 — 0,20 to 0,60 0,50 0,02 to 0,30
N2M3 0,12 0,30 1,10 to 1,60 0,025 0,025 0,80 to 1,20 — 0,40 to 0,65 0,50 —
N2M3T 0,05 to 0,15 0,30 to 0,90 1,40 to 2,10 0,025 0,025 0,70 to 1,20 — 0,40 to 0,65 0,50 0,02 to 0,30
N2M4T 0,12 0,50 to 1,00 1,70 to 2,30 0,025 0,025 0,80 to 1,30 — 0,55 to 0,85 0,50 0,02 to 0,30
c
N3M2 0,08 0,20 to 0,55 1,25 to 1,80 0,010 0,010 1,40 to 2,10 0,30 0,25 to 0,55 0,25 0,10
d
N4M2 0,09 0,20 to 0,55 1,40 to 1,80 0,010 0,010 1,90 to 2,60 0,50 0,25 to 0,55 0,25 0,10
N4M3T 0,12 0,45 to 0,90 1,40 to 1,90 0,025 0,025 1,50 to 2,10 — 0,40 to 0,65 0,50 0,01 to 0,30
N4M4T 0,12 0,40 to 0,90 1,60 to 2,10 0,025 0,025 1,90 to 2,50 — 0,40 to 0,90 0,50 0,02 to 0,30
e
N5M3 0,10 0,25 to 0,60 1,40 to 1,80 0,010 0,010 2,00 to 2,80 0,60 0,30 to 0,65 0,25 0,10
N5M3T 0,12 0,40 to 0,90 1,40 to 2,00 0,025 0,025 2,40 to 3,10 — 0,40 to 0,70 0,50 0,02 to 0,30
N7M4T 0,12 0,30 to 0,70 1,30 to 1,70 0,025 0,025 3,20 to 3,80 0,30 0,60 to 0,90 0,50 0,02 to 0,30

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SIST EN ISO 16834:2012
ISO 16834:2012(E)
8 © ISO 2012 – All rights reserved
Table 3B (continued)
Chemical composition
Symbol a,b
%
...