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1、 Reference number ISO 18275:2005(E) ISO 2005 INTERNATIONAL STANDARD ISO 18275 First edition 2005-03-01 Welding consumables Covered electrodes for manual metal arc welding of high-strength steels Classification Produits consommables pour le soudage Electrodes enrobes pour le soudage manuel larc des a
2、ciers haute rsistance Classification Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 20:53:22 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 18275:
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6、. ISO 2005 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 ISOs member body in
7、 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 copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reserved Copyright International Organization for Standardization Provided by IHS
8、 under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 20:53:22 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 18275:2005(E) ISO 2005 All rights reserved iii Contents Page Forewordiv Introduction v 1 Scope 1 2 Normative refere
9、nces . 1 3 Classification. 2 4 Symbols and requirements 3 4.1 Symbol for the product/process 3 4.2 Symbol for tensile properties of all-weld metal. 3 4.3 Symbol for impact properties of all-weld metal.4 4.4 Symbol for chemical composition of all-weld metal. 5 4.5 Symbol for type of electrode coverin
10、g . 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 hydrogen content of deposited metal. 8 4.10 Mechanical property and composition requirements. 8 4.11 Roun
11、ding procedure. 13 5 Mechanical tests . 13 5.1 General. 13 5.2 Preheating and interpass temperatures. 13 5.3 Pass sequence 13 6 Chemical analysis. 14 7 Fillet weld test . 14 8 Retests . 15 9 Technical delivery conditions 15 10 Examples of designation 16 Annex A (informative) Classification systems.
12、18 Annex B (informative) Description of electrode covering types Classification by yield strength and 47 J impact energy 21 Annex C (informative) Description of electrode covering types Classification by tensile strength and 27 J impact energy. 22 Annex D (informative) Notes on diffusible hydrogen .
13、 24 Annex E (informative) Description of chemical composition symbols (classification by yield strength and 47 J impact energy) 25 Annex F (informative) Description of chemical composition symbols (classification by tensile strength and 27 J impact energy) 26 Bibliography . 27 Copyright Internationa
14、l Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 20:53:22 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 18275:2005(E) iv ISO 2005 All rights reserved Foreword ISO (the I
15、nternational 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
16、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 electrotechnica
17、l 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 bod
18、ies 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
19、 or all such patent rights. ISO 18275 was prepared by Technical Committee ISO/TC 44, Welding and allied processes, Subcommittee SC 3, Welding consumables. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 No
20、t for Resale, 04/12/2007 20:53:22 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 18275:2005(E) ISO 2005 All rights reserved v Introduction This International Standard was prepared by Technical Committee ISO/TC 44/SC 3 through the International Institute of Welding, Com
21、mission II. It 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) identifie
22、s a product as classified in accordance with this International Standard. The classification in accordance with system A is mainly based on EN 757. The classification in accordance with system B is mainly based upon standards used around the Pacific Rim. This International Standard proposes a classi
23、fication system for covered electrodes for high-tensile steels in terms of the tensile properties, impact properties and chemical composition of the all-weld metal, as well as the type of electrode covering. The ratio of yield strength to tensile strength of the weld metal is generally higher than t
24、hat of the 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 metal. Where the application requires matching tensile strength, therefore, selection of the c
25、onsumable should be made by reference to column 3 of Table 1A or Table 8B. It should be noted that the mechanical properties of all-weld metal test specimens used to classify covered electrodes will vary from those obtained in production joints because of differences in welding procedure such as ele
26、ctrode size, width of weave, welding position and parent metal composition. 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
27、www.iso.org. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 20:53:22 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organizati
28、on for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 20:53:22 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 18275:2005(E) ISO 2005 All rights reserved 1 Welding c
29、onsumables Covered electrodes for manual metal arc welding of high-strength 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
30、metal arc welding of high-strength steels with a minimum yield strength greater than 500 MPa or a minimum tensile strength greater than 570 MPa. This International Standard is a combined specification providing a classification utilizing a system based upon the yield strength and an average impact e
31、nergy of 47 J of the all-weld metal, or utilizing a system based upon the tensile strength and an average impact energy of 27 J of the all-weld metal. 1) Subclauses and tables which carry the suffix letter “A” are applicable only to covered electrodes classified under the system based upon the yield
32、 strength and an average impact energy of 47 J of the all-weld metal given in this International Standard. 2) Subclauses and tables which carry the suffix letter “B” are applicable only to covered electrodes classified under the system based upon the tensile strength and an average impact energy of
33、27 J of the all-weld metal given in this International Standard. 3) Subclauses and tables which do not have either the suffix letter “A” or the suffix letter “B” are applicable to all covered electrodes classified under this International Standard. 2 Normative references The following referenced doc
34、uments 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, Weldi
35、ng 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 2560:2002, Welding consumables Covered electrodes for manual meta
36、l arc welding of non-alloy and fine grain steels Classification 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 Working positions Definitions o
37、f angles of slope and rotation ISO 14344, Welding and allied processes Flux and gas shielded electrical welding processes Procurement guidelines for consumables Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545
38、001 Not for Resale, 04/12/2007 20:53:22 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 18275:2005(E) 2 ISO 2005 All rights reserved ISO 15792-1:2000, Welding consumables Test methods Part 1: Test methods for all-weld metal test specimens in steel, nickel and nickel all
39、oys ISO 15792-3, Welding consumables Test methods Part 3: Classification testing of positional capacity and root penetration of welding consumables in a fillet weld 3 Classification Classification designations are based upon two approaches to indicate the tensile properties and the impact properties
40、 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 will be clear from the following subclauses. In most cases, a given commercial product can be classified in both systems.
41、Then either or both classification designations can be used for the product. The classification is based on an electrode diameter of 4,0 mm, with the exception of the symbol for welding position which is based on ISO 15792-3. 3.1A Classification by yield strength and 47 J impact energy The classific
42、ation is divided into nine parts: 1) the first part gives a symbol indicating the product/process to be identified; 2) the second part gives a symbol indicating the strength and elongation of the all-weld metal (see Table 1A); 3) the third part gives a symbol indicating the impact properties of the
43、all-weld metal (see Table 2A); 4) the fourth part gives a symbol indicating the chemical composition of the all-weld metal (see Table 3A); 5) the fifth part gives a symbol indicating the type of electrode covering (see 4.5A); 6) the sixth part gives a symbol indicating post- weld heat treatment if t
44、his is applied (see 4.6A); 7) the seventh part gives a symbol indicating the nominal electrode efficiency and type of current (see Table 5A); 8) the eighth part gives a symbol indicating the welding position (see Table 6A); 9) the ninth part gives a symbol indicating the hydrogen content of the depo
45、sited metal (see Table 7). 3.1B Classification by tensile strength and 27 J impact energy The classification is divided into seven parts: 1) the first part gives a symbol indicating the product/process to be identified; 2) the second part gives a symbol indicating the strength of the all-weld metal
46、(see Table 1B); 3) the third part gives a symbol indicating the type of electrode covering, the type of current and the welding position (see Table 4B); 4) the fourth part gives a symbol indicating the chemical composition of the all-weld metal (see Table 3B); 5) the fifth part gives a symbol indica
47、ting the condition of the post-weld heat treatment under which the all-weld metal test was conducted (see 4.6B); 6) the sixth part gives a symbol indicating that the electrode has satisfied a requirement for 47 J impact energy at the temperature normally used for the 27 J requirement; 7) the seventh
48、 part gives a symbol indicating the hydrogen content of the deposited metal (see Table 7). In both systems, the electrode classification shall include all compulsory sections and may include optional sections as outlined below. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/12/2007 20:53:22 MDTNo reproduction or networking permitted without license from IHS -,