prEN ISO 2560

SLOVENSKI STANDARD
oSIST prEN ISO 2560:2019
01-december-2019

Dodajni materiali za varjenje - Oplaščene elektrode za obločno varjenje nelegiranih

Welding consumables - Covered electrodes for manual metal arc welding of non-alloy

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 (ISO/DIS

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Produits consommables pour le soudage — Électrodes enrobées pour le soudage manuel à l'arc des aciers

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

Foreword ..................................................................................................................................................................... iv

Introduction ................................................................................................................................................................ vi

1 Scope ...................................................................................................................................................................... 1

2 Normative references ....................................................................................................................................... 1

3 Terms and definitions ....................................................................................................................................... 2

4 Classification ........................................................................................................................................................ 2

5 Symbols and requirements ............................................................................................................................. 4

5.1 Symbol for the product/process ................................................................................................................... 4

5.2 Symbols for strength and elongation of all-weld metal ......................................................................... 4

5.3 Symbol for impact properties of all-weld metal ....................................................................................... 5

5.4 Symbol for the chemical composition of all-weld metal ........................................................................ 5

5.5 Symbol for type of electrode covering ......................................................................................................... 6

5.6 Symbol for condition of post-weld heat-treatment of all-weld metal ............................................... 8

5.7 Symbol for nominal electrode efficiency and type of current .............................................................. 8

5.8 Symbol for welding position ........................................................................................................................... 9

5.9 Symbol for diffusible hydrogen content of deposited metal ................................................................ 9

6 Mechanical tests .............................................................................................................................................. 10

6.1 Preheating and interpass temperatures .................................................................................................. 10

6.2 Pass sequence ................................................................................................................................................... 13

7 Chemical analysis ............................................................................................................................................ 14

8 Fillet weld test .................................................................................................................................................. 17

9 Rounding procedure ...................................................................................................................................... 19

10 Retests ................................................................................................................................................................ 19

11 Technical delivery conditions ..................................................................................................................... 19

12 Examples of designation ............................................................................................................................... 20

Annex A (informative) Classification systems .............................................................................................. 21

Annex B (informative) Description of types of electrode covering — Classification by yield

strength and 47 J impact energy .......................................................................................................... 24

Annex C (informative) Description of types of electrode covering — Classification by

tensile strength and 27 J impact energy ............................................................................................ 26

Annex D (informative) Notes on diffusible hydrogen and the avoidance of cold cracking ............ 29

Bibliography ............................................................................................................................................................. 30

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

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

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. Details of any

patent rights identified during the development of the document will be in the Introduction and/or on

Any trade name used in this document is information given for the convenience of users and does not

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the World

Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see

This document was prepared by Technical Committee ISO/TC 44, Welding and allied processes],

Any feedback or questions on this document should be directed to the user’s national standards body. A

Official interpretations of TC 44 documents, where they exist, are available from this page:

This fourth edition cancels and replaces the third edition (ISO 2560:2009), which has been technically

— draft updated to latest ISO template and styles, e.g. AC for a.c. and DC for d.c.

— Table 3B: alloy symbol “No symbol, −1, −P1 or −P2”, nominal level (% by mass) for Mn is now 1,3

— Table 4B: footnote “d” added to the “All” for symbol 45 to state: “Not including PF (vertical up)”

— Table 10B: Maximum Si values have been changed for E4918 and E4918-1, E5516-3M3, E5516-N7

This document 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 document. The classification in accordance with system A is mainly

based on EN 499:1994. The classification in accordance with system B is mainly based upon standards

This Document 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

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

This document specifies requirements for the 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

This document 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

a) Clauses, subclauses 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

b) Clauses, subclauses 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

c) Clauses, subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B”

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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

ISO 2401, Covered electrodes — Determination of the efficiency, metal recovery and deposition coefficient

ISO 3690, Welding and allied processes — Determination of hydrogen content in arc weld metal

ISO 6847, Welding consumables — Deposition of a weld metal pad for chemical analysis

ISO 13916, Welding — Measurement of preheating temperature, interpass temperature and preheat

ISO 15792-1:2000, Welding consumables — Test methods — Part 1: Test methods for all-weld metal test

specimens in steel, nickel and nickel alloys. Amended by ISO 15792-1:2000/Amd 1:2011

ISO 15792-3:2011, Welding consumables — Test methods — Part 3: Classification testing of positional

ISO 80000-1, Quantities and units — Part 1: General. Corrected by ISO 80000-1:2009/Cor 1:2011

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

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

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

4A Classification by yield strength and 47 J 4B Classification by tensile strength and 27 J

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

2) the second part gives a symbol indicating 2) the second part gives a symbol indicating

the strength and elongation of all-weld metal (see the strength of all-weld metal (see Table 1B);

3) the third part gives a symbol indicating the type of electrode covering, the type of current,

the impact properties of all-weld metal (see and the welding position (see Table 4B);

4) the fourth part gives a symbol indicating the chemical composition of all-weld metal (see

5) the fifth part gives a symbol indicating the condition of post-weld heat treatment under

type of electrode covering (see 5.5A); which the all-weld metal test was conducted

nominal electrode efficiency and type of current 6) the sixth part gives a symbol indicating

In order to promote the use of this Document, the In order to promote the use of this Document, the

classification is split into two sections: classification is split into two sections:

This section includes the symbols for the type of This section includes the symbols for the type of

product, the strength and elongation, the impact product, the strength, the type of covering, the

properties, the chemical composition and the type type of current, the welding position, the chemical

of covering, i.e. the symbols defined in 5.1, 5.2A, composition and the condition of heat treatment,

This section includes the symbols for the nominal This section includes the symbol for the optional

electrode efficiency, the type of current, the supplemental designator for 47 J impact energy,

welding positions for which the electrode is i.e. the symbol defined in 5.3B; and the symbol for

suitable, and the symbol for diffusible hydrogen diffusible hydrogen content, i.e., the symbol

The designation (see Clause 12), 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

The symbol for the covered electrode used in the manual metal arc welding process shall be the letter E

5.2A Classification by yield strength and 5.2B Classification by tensile strength and

The symbols in Table 1A indicate the yield The symbols in Table 1B indicate the tensile

strength, tensile strength, and elongation of the strength of the all-weld metal in the as-welded

all-weld metal in the as-welded condition, condition or in the post-weld heat-treated

(Classification by yield strength and 47 J impact (Classification by tensile strength and 27 J impact

5.3A Classification by yield strength and 5.3B Classification by tensile strength and

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

achieved under the conditions given in Clause 6. determines the temperature at which an impact

Three specimens shall be tested. Only one energy of 27 J is achieved in the as-welded

individual value may be lower than 47 J but not condition or in the post-weld heat-treated

lower than 32 J. When an all-weld metal has been condition under the conditions given in Clause 6.

classified for a certain temperature, it Five test specimens shall be tested. The lowest

automatically covers any higher temperature in and highest values obtained shall be disregarded.

5.4A Classification by yield strength and 5.4B Classification by tensile strength and

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

Table 2A — Symbol for chemical composition Table 3B — Symbol for chemical composition

(Classification by yield strength and 47 J impact (Classification by tensile strength and 27 J impact

5.5A Classification by yield strength and 5.5B Classification by tensile strength and

The type of covering of a covered electrode The type of covering of a covered electrode

depends substantially on the types of slag- depends substantially on the types of slag-

forming components. The symbols indicating the forming components. The type of covering also

covering type shall be in accordance with determines the positions suitable for welding and