EN ISO 2560:2009

SLOVENSKI STANDARD
01-april-2010
1DGRPHãþD
SIST EN ISO 2560:2006
'RGDMQLPDWHULDOL]DYDUMHQMH2SODãþHQHHOHNWURGH]DREORþQRYDUMHQMHQHOHJLUDQLK
LQGUREQR]UQDWLKMHNHO5D]YUVWLWHY,62
Welding consumables - Covered electrodes for manual metal arc welding of non-alloy
and fine grain steels - Classification (ISO 2560:2009)
Schweißzusätze - Umhüllte Stabelektroden zum Lichtbogenhandschweißen von
unlegierten Stählen und Feinkornstählen - Einteilung (ISO 2560:2009)
Produits consommables pour le soudage - Électrodes enrobées pour le soudage manuel
a l'arc des aciers non alliés et des aciers a grains fins - Classification (ISO 2560:2009)
Ta slovenski standard je istoveten z: EN ISO 2560:2009
ICS:
25.160.20 Potrošni material pri varjenju Welding consumables
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 2560
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2009
ICS 25.160.20 Supersedes EN ISO 2560:2005
English Version
Welding consumables - Covered electrodes for manual metal
arc welding of non-alloy and fine grain steels - Classification
(ISO 2560:2009)
Produits consommables pour le soudage - Électrodes Schweißzusätze - Umhüllte Stabelektroden zum
enrobées pour le soudage manuel à l'arc des aciers non Lichtbogenhandschweißen von unlegierten Stählen und
alliés et des aciers à grains fins - Classification (ISO Feinkornstählen - Einteilung (ISO 2560:2009)
2560:2009)
This European Standard was approved by CEN on 17 September 2009.

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: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2560:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 2560:2009) 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 April 2010, and conflicting national standards shall be withdrawn at the
latest by April 2010.
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 2560:2005.
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 2560:2009 has been approved by CEN as a EN ISO 2560:2009 without any modification.

INTERNATIONAL ISO
STANDARD 2560
Third edition
2009-10-15
Welding consumables — Covered
electrodes for manual metal arc welding
of non-alloy and fine grain steels —
Classification
Produits consommables pour le soudage — Électrodes enrobées pour
le soudage manuel à l'arc des aciers non alliés et des aciers à grains
fins — Classification
Reference number
ISO 2560:2009(E)
©
ISO 2009
ISO 2560:2009(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.

©  ISO 2009
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 copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2009 – All rights reserved

ISO 2560:2009(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 Symbols for strength and elongation of all-weld metal .3
4.3 Symbol for impact properties of all-weld metal .4
4.4 Symbol for the chemical composition of all-weld metal .5
4.5 Symbol for type of electrode covering.6
4.6 Symbol for condition of post-weld heat-treatment of all-weld metal.7
4.7 Symbol for nominal electrode efficiency and type of current .7
4.8 Symbol for welding position .8
4.9 Symbol for diffusible hydrogen content of deposited metal .8
5 Mechanical tests.9
5.1 Preheating and interpass temperatures.9
5.2 Pass sequence.13
6 Chemical analysis .13
7 Fillet weld test.16
8 Rounding procedure .18
9 Retests.18
10 Technical delivery conditions .18
11 Examples of designation .19
Annex A (informative) Classification systems.20
Annex B (informative) Description of types of electrode covering — Classification by yield
strength and 47 J impact energy .23
Annex C (informative) Description of types of electrode covering — Classification by tensile
strength and 27 J impact energy .25
Annex D (informative) Notes on diffusible hydrogen and the avoidance of cold cracking .28
Bibliography.29

ISO 2560:2009(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 2560 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee
SC 3, Welding consumables.
This third edition cancels and replaces the second edition (ISO 2560:2002), which has been technically
revised.
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 2009 – All rights reserved

ISO 2560:2009(E)
Introduction
This International Standard recognizes that there are two somewhat different approaches in the global market
to classifying a given electrode, 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
[1]
mainly based on EN 499:1994 . The classification in accordance with system B is mainly based upon
standards used around the Pacific Rim.
This International Standard provides a classification in order to designate covered electrodes in terms of the
yield strength, tensile strength and elongation of the all-weld metal. The ratio of yield strength 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 does not necessarily ensure that the weld metal tensile
strength matches that of the parent metal. Therefore, where the application requires matching tensile strength,
selection of the consumable should be made by reference to column 3 of Table 1A or to Table 1B and
Table 8B.
It should be noted that the mechanical properties of all-weld metal test specimens used to classify the
electrodes vary from those obtained in production joints because of differences in welding procedure such as
electrode size, width of weave, welding position, welding current, interpass temperature and parent metal
composition.
INTERNATIONAL STANDARD ISO 2560:2009(E)

Welding consumables — Covered electrodes for manual metal
arc welding of non-alloy and fine grain steels — Classification
1 Scope
This International Standard specifies requirements for classification of covered electrodes and deposited
metal in the as-welded condition and in the post-weld heat-treated condition for manual metal arc welding of
non-alloy and fine grain steels with a minimum yield strength of up to 500 MPa or a minimum tensile strength
of up to 570 MPa.
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.
a) Paragraphs and tables which carry the suffix letter “A” are applicable only to covered electrodes classified
to the system based upon the yield strength and the average impact energy of 47 J of all-weld metal in
this International Standard.
b) Paragraphs and tables which carry the suffix letter “B” are applicable only to covered electrodes classified
to the system based upon the tensile strength and the average impact energy of 27 J of all-weld metal in
this International Standard.
c) Paragraphs and tables which do not have either the suffix letter “A” or the suffix letter “B” are applicable to
all covered electrodes classified in 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 welding filler materials — Type of product,
dimensions, tolerances and markings
ISO 2401, Covered electrodes — Determination of the efficiency, metal recovery and deposition coefficient
ISO 3690, Welding and allied processes — Determination of hydrogen content in ferritic steel arc weld metal
ISO 6847, Welding consumables — Deposition of a weld metal pad for chemical analysis
ISO 6947, Welds — Welding positions
ISO 13916, Welding — Guidance on the measurement of preheating temperature, interpass temperature and
preheat maintenance temperature
ISO 14344, Welding and allied processes — Procurement of welding consumables
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 2560:2009(E)
ISO 15792-3:2000, Welding consumables — Test methods — Part 3: Classification testing of positional
capacity and root penetration of welding consumables in a fillet weld (as amended by
ISO 15792-3:2000/Cor.1:2006)
ISO 80000-1, Quantities and units — Part 1: General
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 electrode. The two designation approaches include
additional designators for some other classification requirements, but not all, as is clear from the following
subclauses. In most cases, a given commercial product can be classified in both systems. Then either or both
classification designations can be used for the product.
The classification includes all-weld metal properties obtained with a covered electrode as given below. The
classification is based on an electrode size of 4,0 mm, with the exception of the symbol for welding position,
which is based on ISO 15792-3. Where the defined diameter has not been manufactured, the closest diameter
to 4,0 mm shall be used for all-weld metal tests.

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 eight parts: The classification is divided into seven 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 of all-weld metal (see Table 1B);
Table 1A);
3) the third part gives a symbol indicating the type
3) the third part gives a symbol indicating the of electrode covering, the type of current, and the
impact properties of all-weld metal (see Table 2A); welding position (see Table 4B);
4) the fourth part gives a symbol indicating the 4) the fourth part gives a symbol indicating the
chemical composition of all-weld metal (see chemical composition of all-weld metal (see
Table 3A); Table 3B);
5) the fifth part gives a symbol indicating the type 5) the fifth part gives a symbol indicating the
of electrode covering (see 4.5A); condition of post-weld heat treatment under which
the all-weld metal test was conducted (see 4.6B);
6) the sixth part gives a symbol indicating the
nominal electrode efficiency and type of current (see 6) the sixth part gives a symbol indicating that the
Table 5A); electrode has satisfied a requirement for 47 J impact
energy at the temperature normally used for the
7) the seventh part gives a symbol indicating the
27 J requirement;
welding position (see Table 6A);
7) the seventh part gives a symbol indicating the
8) the eighth part gives a symbol indicating the
diffusible hydrogen content of the deposited metal
diffusible hydrogen content of the deposited metal
(see Table 7).
(see Table 7).
2 © ISO 2009 – All rights reserved

ISO 2560:2009(E)
In order to promote the use of this International In order to promote the use of this International
Standard, the classification is split into two sections: Standard, the classification is split into two sections:
a) Compulsory section a) Compulsory section
This section includes the symbols for the type This section includes the symbols for the type of
of product, the strength and elongation, the product, the strength, the type of covering, the
impact properties, the chemical composition type of current, the welding position, the
and the type of covering, i.e. the symbols chemical composition and the condition of heat
defined in 4.1, 4.2A, 4.3A, 4.4A and 4.5A. treatment, i.e. the symbols defined in 4.1, 4.2B,
4.4B, 4.5B and 4.6B.
b) Optional section b) Optional section
This section includes the symbols for the This section includes the symbol for the optional
nominal electrode efficiency, the type of current, supplemental designator for 47 J impact
the welding positions for which the electrode is energy, i.e. the symbol defined in 4.3B; and the
suitable, and the symbol for diffusible hydrogen symbol for diffusible hydrogen content, i.e., the
content, i.e. the symbols defined in 4.7A, 4.8A symbol defined in 4.9.
and 4.9.
The designation (see Clause 11), compulsory section and any chosen elements of the optional section, shall
be used on packages and in the manufacturer's literature and data sheets. See Figure A.1 for a schematic
representation of the full designation of electrodes classified by yield strength and 47 J impact energy
(system A). See Figure A.2 for a schematic representation of the full designation of electrodes classified by
tensile strength and 27 J impact energy (system B).
4 Symbols and requirements
4.1 Symbol for the product/process
The symbol for the covered electrode used in the manual metal arc welding process shall be the letter E
placed at the beginning of the designation.
4.2 Symbols for strength and elongation 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 symbols in Table 1A indicate the yield strength, The symbols in Table 1B indicate the tensile
tensile strength, and elongation of the all-weld metal strength of the all-weld metal in the as-welded
in the as-welded condition, determined in condition or in the post-weld heat-treated condition,
accordance with Clause 5. determined in accordance with Clause 5. The yield
strength and elongation requirements depend upon
the specific chemical composition, heat treatment
condition and coating type, as well as upon the
tensile strength requirements, as given for the
complete classification in Table 8B.

ISO 2560:2009(E)
Table 1A — Symbol for strength and elongation Table 1B — Symbol for strength of
of all-weld metal all-weld metal
(Classification by yield strength and 47 J impact (Classification by tensile strength and 27 J impact
energy) energy)
Minimum
Tensile Minimum
yield Minimum tensile strength
b
strength elongation
a
Symbol Symbol
strength
MPa MPa % MPa
35 355 440 to 570 22 43 430
38 380 470 to 600 20 49 490
42 420 500 to 640 20 55 550
46 460 530 to 680 20 57 570
50 500 560 to 720 18
a
For yield strength, the lower yield strength (R ) shall be

eL
used when yielding occurs, otherwise the 0,2 % proof strength
(R ) shall be used.
p0,2
b
The gauge length is equal to five times the specimen
diameter.
4.3 Symbol for impact properties of all-weld metal
4.3A Classification by yield strength and 4.3B Classification by tensile strength and
47 J impact energy 27 J impact energy
The symbols in Table 2A indicate the temperature There is no specific symbol for impact properties.
at which an average impact energy of 47 J is The complete classification in Table 8B determines
achieved under the conditions given in Clause 5. the temperature at which an impact energy of 27 J
Three specimens shall be tested. Only one is achieved in the as-welded condition or in the
individual value may be lower than 47 J but not post-weld heat-treated condition under the
lower than 32 J. When an all-weld metal has been conditions given in Clause 5. Five test specimens
classified for a certain temperature, it automatically shall be tested. The lowest and highest values
covers any higher temperature in Table 2A. 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
Table 2A — Symbol for impact properties
not be less than 20 J. The average of the three
of all-weld metal
remaining values shall be at least 27 J.
(Classification by yield strength and 47 J impact
energy)
The addition of the optional symbol U, immediately
after the symbol for condition of heat treatment,
Temperature for minimum average
indicates that the supplemental requirement of 47 J
impact energy of 47 J
Symbol
impact energy at the normal 27 J impact test
°C
temperature has also been satisfied. For the 47 J
Z No requirement impact requirement, the number of specimens
tested and values obtained shall meet the
A +20
requirement of 4.3A.
0 0
2 −20
3 −30
4 −40
5 −50
6 −60
4 © ISO 2009 – All rights reserved

ISO 2560:2009(E)
4.4 Symbol for the chemical composition of all-weld metal
4.4A Classification by yield strength and 4.4B Classification by tensile strength and
47 J impact energy 27 J impact energy
The symbols in Table 3A indicate the chemical The symbols in Table 3B indicate the principal
composition of all-weld metal, determined in alloying elements, and sometimes the nominal alloy
accordance with Clause 6. level of the most significant alloy element, of all-weld
metal, determined in accordance with Clause 6. The
symbol for chemical composition does not
immediately follow the symbol for strength, but
follows the symbol for coating type. The complete
classification, given in Table 10B, determines the
exact chemical composition requirements for a
particular electrode classification.
Table 3A — Symbol for chemical composition Table 3B — Symbol for chemical composition
of all-weld metal of all-weld metal
(Classification by yield strength and 47 J impact (Classification by tensile strength and 27 J impact
energy) energy)
Chemical composition
Chemical composition
abc
% (by mass)
Alloy Alloy
symbol symbol
Principal alloy Nominal level
Mn Mo Ni
element(s) % (by mass)
No symbol, −1,
No symbol 2,0 — — Mn 1,0
−P1 or −P2
Mo 1,4 0,3 to 0,6 — −1M3 Mo 0,5
Mn 1,5
MnMo 1,4 to 2,0 0,3 to 0,6 —
−3M2
Mo 0,4
Mn 1,5
1Ni 1,4 — 0,6 to 1,2 −3M3
Mo 0,5
Mn1Ni 1,4 to 2,0 — 0,6 to 1,2 −N1 Ni 0,5
2Ni 1,4 — 1,8 to 2,6 −N2 Ni 1,0
Mn2Ni 1,4 to 2,0 — 1,2 to 2,6
−N3 Ni 1,5
3Ni 1,4 — 2,6 to 3,8
Mn 1,5
−3N3
Ni 1,5
1NiMo 1,4 0,3 to 0,6 0,6 to 1,2
c
Z Any other agreed composition −N5 Ni 2,5
a −N7 Ni 3,5
If not specified, Mo < 0,2; Ni < 0,3; Cr < 0,2; V < 0,05;
Nb < 0,05; Cu < 0,3.
−N13 Ni 6,5
b
Ni 1,0
Single values shown in the table mean maximum values.
−N2M3
Mo 0,5
c
Consumables for which the chemical composition is not
Ni 0,5
listed in the table may be symbolized similarly and prefixed by
−NC
Cu 0,4
the letter Z. The chemical composition ranges are not specified
and therefore two electrodes with the same Z-classification may
Cr 0,5
−CC
not be interchangeable.
Cu 0,4
Ni 0,2
−NCC Cr 0,6
Cu 0,5
Ni 0,6
−NCC1 Cr 0,6
Cu 0,5
Ni 0,3
−NCC2 Cr 0,2
Cu 0,5
−G Any other agreed composition
ISO 2560:2009(E)
4.5 Symbol for type of electrode covering
4.5A Classification by yield strength and 4.5B Classification by tensile strength and
47 J impact energy 27 J impact energy
The type of covering of a covered electrode The type of covering of a covered electrode
depends substantially on the types of slag-forming depends substantially on the types of slag-forming
components. The symbols indicating the covering components. The type of covering also determines
type shall be in accordance with Table 4A. the positions suitable for welding and the type of
current, in accordance with Table 4B.

Table 4A — Symbol for type of covering Table 4B — Symbol for type of covering
(Classification by yield strength (Classification by tensile strength
and 47 J impact energy) and 27 J impact energy)
Type of Welding Type of
Symbol Type of covering Symbol
a b
covering positions current
a.c. and d.c.
c
A Acid covering 03 Rutile basic All
(±)
C Cellulosic covering 10 Cellulosic All d.c. (+)
a.c. and d.c.
R Rutile covering 11 Cellulosic All
(+)
a.c. and d.c.
c
RR Rutile thick covering 12 Rutile All
(−)
a.c. and d.c.
c
RC Rutile-cellulosic covering 13 Rutile All
(±)
Rutile + iron a.c. and d.c.
c
RA Rutile-acid covering 14
All
powder (±)
c
RB Rutile-basic covering 15 Basic All d.c. (+)
a.c. and d.c.
c
B Basic covering 16 Basic All
(+)
NOTE A description of the characteristics of each of the
Basic + iron a.c. and d.c.
c
18 All
types of covering is given in Annex B.
powder (+)
a.c. and d.c.
c
19 Ilmenite All
(±)
a.c. and d.c.
20 Iron oxide PA, PB
(−)
Rutile + iron a.c. and d.c.
24 PA, PB
powder (±)
Iron oxide + a.c. and d.c.
27 PA, PB
iron powder (±)
Basic + iron a.c. and d.c.
28 PA, PB, PC
powder (+)
Manufacturer's
40 Not specified
recommendations
45 Basic All d.c. (+)
a.c. and d.c.
48 Basic All
(+)
NOTE A description of the characteristics of each of the

types of covering is given in Annex C.
a
Positions are defined in ISO 6947. PA = flat, PB =
horizontal vertical fillet, PC = horizontal, PG = vertical down.
b
Alternating current = a.c.; direct current = d.c.
c
The indication “all positions” may or may not include
vertical down welding. This shall be specified in the
manufacturer's literature.
6 © ISO 2009 – All rights reserved

ISO 2560:2009(E)
4.6 Symbol for condition of post-weld heat-treatment of all-weld metal
4.6A Classification by yield strength and 4.6B Classification by tensile strength and
47 J impact energy 27 J impact energy
Classification is based upon mechanical properties If the electrode has been classified in the as-welded
of the all-weld metal in the as-welded condition only. condition, the symbol A shall be added to the
There is no symbol for condition of post-weld heat classification. If the electrode has been classified in
treatment. the post-weld heat-treated condition, the symbol P
shall be added to the classification. When classified
in the post-weld heat-treated condition, the
temperature of post-weld heat treatment shall be
620 °C ± 15 °C, except for chemical compositions
N5 and N7, where the temperature shall be
605 °C ± 15 °C, and chemical composition N13,
where the temperature shall be 600 °C ± 15 °C.
+ 15min
Post-weld heat treatment time shall be 1h ( ) at
temperature. If the electrode has been classified in
both conditions, the symbol AP shall be added to
the classification.
The furnace shall be at a temperature not higher
than 300 °C when the test assembly is placed in it.
The heating rate, from that point to the specified
holding temperature, shall be 85 °C to 275 °C/h.
When the holding time has been completed, the
assembly shall be allowed to cool in the furnace to a
temperature below 300 °C at a rate not exceeding
200 °C/h. The assembly may be removed from the
furnace at any temperature below 300 °C, and
allowed to cool in still air to room temperature.
4.7 Symbol for nominal electrode efficiency and type of current
4.7A Classification by yield strength and 4.7B Classification by tensile strength and
47 J impact energy 27 J impact energy
The symbols in Table 5A indicate nominal electrode There is no specific symbol for nominal electrode
efficiency, determined in accordance with ISO 2401 efficiency and type of current. Type of current is
with the type of current shown in Table 5A. included in the symbol for type of covering
(Table 4B). Nominal electrode efficiency is not
addressed.
Table 5A — Symbol for nominal electrode
efficiency and type of current
(Classification by yield strength and 47 J impact
energy)
Nominal electrode Type of
Symbol
ab
efficiency, η, % current
1 η u 105 a.c. and d.c.
2 η u 105 d.c.
3 105 < η u 125 a.c. and d.c.
4 105 < η u 125 d.c.
5 125 < η u 160 a.c. and d.c.
6 125 < η u 160 d.c.
7 η > 160 a.c. and d.c.
8 η > 160 d.c.
a
In order to demonstrate operability on a.c., tests shall be
carried out with an open circuit voltage no higher than 65 V.
b
Alternating current = a.c.; direct current = d.c.
ISO 2560:2009(E)
4.8 Symbol for welding position
4.8A Classification by yield strength and 4.8B Classification by tensile strength and
47 J impact energy 27 J impact energy
The symbols in Table 6A for welding positions There is no specific symbol for welding position. The
indicate the positions for which the electrode is welding position requirements are included with the
tested in accordance with ISO 15792-3. For testing symbol for type of covering (Table 4B).
requirements, see Clause 7.
Table 6A — Symbol for welding position
(Classification by yield strength and
47 J impact energy)
Welding positions in
Symbol
accordance with ISO 6947
PA, PB, PC, PD, PE, PF, PG
PA, PB, PC, PD, PE, PF
PA, PB
4 PA
5 PA, PB, PG
4.9 Symbol for diffusible hydrogen content of deposited metal
The symbols in Table 7 indicate diffusible hydrogen content determined in deposited metal from an electrode
of size 4 mm in accordance with the method given in ISO 3690. The current used shall be 70 % to 90 % of the
maximum value recommended by the manufacturer. Electrodes recommended for use with a.c. and d.c. shall
be tested using a.c. Electrodes recommended for d.c. only shall be tested using d.c. with electrode positive.
The manufacturer shall provide information on the recommended type of current and redrying conditions for
achieving the diffusible hydrogen levels.
Table 7 — Symbol for diffusible hydrogen content of deposited metal
Diffusible hydrogen content
Symbol max.
ml/100 g of deposited weld metal
H5 5
H10 10
H15 15
See Annex D for additional information about diffusible hydrogen.
8 © ISO 2009 – All rights reserved

ISO 2560:2009(E)
5 Mechanical tests
5A Classification by yield strength and 5B Classification by tensile strength and
47 J impact energy 27 J impact energy
Tensile and impact tests and any required retests Tensile and impact tests and any required retests
shall be carried out in the as-welded condition using shall be carried out in the as-welded condition
an all-weld metal test assembly type 1.3 in and/or in the post-weld heat-treated condition, using
accordance with ISO 15792-1:2000 and the welding an all-weld metal test assembly type 1.3 in
conditions described in 5.1 and 5.2. accordance with ISO 15792-1:2000 and the welding
conditions described in 5.1 and 5.2.
When diffusible hydrogen removal treatment is specified by the manufacturer, it shall be carried out in
accordance with ISO 15792-1:2000.
5.1 Preheating and interpass temperatures
The preheating and interpass temperatures shall be measured using temperature indicator crayons, surface
thermometers or thermocouples (see ISO 13916).
5.1A Classification by yield strength and 47 J 5.1B Classification by tensile strength and 27 J
impact energy impact energy
Preheating is not required; welding may start from Preheating and interpass temperature for electrodes
room temperature. The interpass temperature shall with no chemical composition symbol or with the −1
be in the range 90 °C to 175 °C. If, after any pass,
symbol in Tables 3B and 8B shall be 100 °C to
the interpass temperature is exceeded, the test 150 °C. Preheating and interpass temperatures for
assembly shall be cooled in air to a temperature
all other compositions shall be 90 °C to 110 °C.
below that limit.
To reach tensile test requirements and impact
properties at the same time, it may be necessary to
keep the interpass temperature in a small range.
ISO 2560:2009(E)
Table 8B — Mechanical test requirements
(Classification by tensile strength and 27 J impact energy)
Temperature of
a
Elongation
a a
Tensile strength Yield strength Charpy V-notch
A
Classification 5 b
determination
MPa MPa % °C
E4303 430 330 20 0
E4310 430 330 20 −30
E4311 430 330 20 −30
E4312 430 330 16 NS
E4313 430 330 16 NS
E4316 430 330 20 −30
E4318 430 330 20 −30
E4319 430 330 20 −20
E4320 430 330 20 NS
E4324 430 330 16 NS
E4327 430 330 20 −30
E4340 430 330 20 0
E4903 490 400 20 0
E4910 490 to 650 400 20 −30
E4911 490 to 650 400 20 −30
E4912 490 400 16 NS
E4913 490 400 16 NS
E4914 490 400 16 NS
E4915 490 400 20 −30
E4916 490 400 20 −30
E4916-1 490 400 20 −45
E4918 490 400 20 −30
E4918-1 490 400 20 −45
E4919 490 400 20 −20
E4924 490 400 16 NS
E4924-1 490 400 20 −20
E4927 490 400 20 −30
E4928 490 400 20 −20
E4948 490 400 20 −30
E5716 570 490 16 −30
E5728 570 490 16 −20
E4910-P1 490 420 20 −30
E5510-P1 550 460 17 −30
E5518-P2 550 460 17 −30
E5545-P2 550 460 17 −30
10 © ISO 2009 – All rights reserved

ISO 2560:2009(E)
Table 8B (continued)
Temperature of
a
Elongation
a a
Tensile strength Yield strength Charpy V-notch
A
5 b
Classification
determination
MPa MPa % °C
E4910-1M3 490 420 20 NS
E4911-1M3 490 400 20 NS
E4915-1M3 490 400 20 NS
E4916-1M3 490 400 20 NS
E4918-1M3 490 400 20 NS
E4919-1M3 490 400 20 NS
E4920-1M3 490 400 20 NS
E4927-1M3 490 400 20 NS
E5518-3M2 550 460 17 −50
E5516-3M3 550 460 17 −50
E5518-3M3 550 460 17 −50
E4916-N1 490 390 20 −40
E4928-N1 490 390 20 −40
E5516-N1 550 460 17 −40
E5528-N1 550 460 17 −40
E4916-N2 490 390 20 −40
E4918-N2 490 390 20 −50
E5516-N2 550 470 to 550 20 −40
E5518-N2 550 470 to 550 20 −40
E4916-N3 490 390 20 −40
E5516-N3 550 460 17 −50
E5516-3N3 550 460 17 −50
E5518-N3 550 460 17 −50
E4915-N5 490 390 20 −75
E4916-N5 490 390 20 −75
E4918-N5 490 390 20 −75
E4928-N5 490 390 20 −60
E5516-N5 550 460 17 −60
E5518-N5 550 460 17 −60
E4915-N7 490 390 20 −100
E4916-N7 490 390 20 −100
E4918-N7 490 390 20 −100
E5516-N7 550 460 17 −75
E5518-N7 550 460 17 −75
E5516-N13 550 460 17 −100
E5518-N2M3 550 460 17 −40
ISO 2560:2009(E)
Table 8B (continued)
Temperature of
a
Elongation
a a
Tensile strength Yield strength Charpy V-notch
A
5 b
Classification
determination
MPa MPa % °C
E4903-NC 490 390 20 0
E4916-NC 490 390 20 0
E4928-NC 490 390 20 0
E5716-NC 570 490 16 0
E5728-NC 570 490 16 0
E4903-CC 490 390 20 0
E4916-CC 490 390 20 0
E4928-CC 490 390 20 0
E5716-CC 570 490 16 0
E5728-CC 570 490 16 0
E4903-NCC 490 390 20 0
E4916-NCC 490 390 20 0
E4928-NCC 490 390 20 0
E5716-NCC 570 490 16 0
E5728-NCC 570 490 16 0
E4903-NCC1 490 390 20 0
E4916-NCC1 490 390 20 0
E4928-NCC1 490 390 20 0
E5516-NCC1 550 460 17 −20
E5518-NCC1 550 460 17 −20
E5716-NCC1 570 490 16 0
E5728-NCC1 570 490 16 0
E4916-NCC2 490 420 20 −20
E4918-NCC2 490 420 20 −20
E49XX-G 490 400 20 NS
E55XX-G 550 460 17 NS
E57XX-G 570 490 16 NS
a
Single values are minimum requirements.
b
Not specified = NS.
12 © ISO 2009 – All rights reserved

ISO 2560:2009(E)
5.2 Pass sequence
The pass sequence shall be as indicated in Table 9.
The direction of welding to complete a pass shall not vary. Each pass shall be executed with a welding current
of 70 % to 90 % of the maximum current recommended by the manufacturer. Regardless of the type of
covering, welding shall be performed with a.c. when both a.c. or d.c. are applicable and with d.c. using the
recommended polarity when only d.c. is claimed.
Table 9 — Pass sequence
a
Electrode diameter Split weave
mm
Layer No. Passes per layer Number of layers
b
4,0 1 to top 2 7 to 9
a
For diameters other than 4,0 mm, the pass sequence is to be specified by the manufacturer.
b
The top two layers may be completed with 3 passes per layer.
6 Chemical analysis
Chemical analysis may be performed on any suitable test piece, but in cases of dispute, specimens in
accordance with ISO 6847 shall be used. Any analytical technique may be used, but in cases of dispute,
reference shall be made to established published methods.
6A Classification by yield strength and 6B Classification by tensile strength and
47 J impact energy 27 J impact energy
The results of the chemical analysis shall fulfil the The results of the chemical analysis shall fulfil the
requirements given in Table 3A. requirements given in Table 10B for the
classification under test.
Table 10B — All-weld metal deposit composition requirements
ab
(Classification by tensile strength and 27 J impact energy)
Chemical composition % (by mass)
Classification
C Mn Si P S Ni Cr Mo V Cu Al
E4303 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4310 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4311 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4312 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4313 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4316 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4318 0,03 0,60 0,40 0,025 0,015 0,30 0,20 0,30 0,08 NS NS
E4319 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4320 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4324 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4327 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4340 NS NS NS NS NS NS NS NS NS NS NS
E4903 0,15 1,25 0,90 NS NS 0,30 0,20 0,30 0,08 NS NS
E4910 0,20 1,25 0,90 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4911 0,20 1,25 0,90 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
ISO 2560:2009(E)
Table 10B (continued)
Chemical composition % (by mass)
Classification
C Mn Si P S Ni Cr Mo V Cu Al
E4912 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4913 0,20 1,20 1,00 NS NS 0,30 0,20 0,30 0,08 NS NS
E4914 0,15 1,25 0,90 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4915 0,15 1,25 0,90 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4916 0,15 1,60 0,75 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4916-1 0,15 1,60 0,75 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4918 0,15 1,60 0,90 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4918-1 0,15 1,60 0,90 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4919 0,15 1,25 0,90 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4924 0,15 1,25 0,90 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4924-1 0,15 1,25 0,90 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4927 0,15 1,60 0,75 0,035 0,035 0,30 0,20 0,30 0,08 NS NS
E4928 0,15 1,60 0,90 0,035 0,035 0,30 0,20 0,30 0,08 NS N
...