Welding consumables. Solid wire electrodes, tubular cored electrodes and electrode-flux combinations for submerged arc welding of high strength steels. Classification (ISO 26304:2017)
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ISO 26304:2017 specifies requirements for classification of solid wire electrodes, tubular cored electrodes, and electrode-flux combinations (the all-weld metal deposits) in the as-welded condition and in the post-weld heat-treated condition for submerged arc welding of high strength steels with a minimum yield strength greater than 500 MPa or a minimum tensile strength greater than 570 MPa. One flux can be tested and classified with different electrodes. One electrode can be tested and classified with different fluxes. The solid wire electrode is also classified separately based on its chemical composition. This document is a combined specification providing for classification utilizing a system based on the yield strength and average impact energy of 47 J for the all-weld metal, or utilizing a system based on the tensile strength and average impact energy of 27 J for the all-weld metal. a) Clauses, subclauses and tables which carry the suffix letter "A" are applicable only to solid wire electrodes, tubular cored electrodes and the all-weld metal deposits classified to the system based on the yield strength and the average impact energy of 47 J for the all-weld metal obtained with electrode-flux combinations in accordance with this document. b) Clauses, subclauses and tables which carry the suffix letter "B" are applicable only to solid wire electrodes, tubular cored electrodes and the all-weld metal deposits classified to the system based on the tensile strength and the average impact energy of 27 J for the all-weld metal obtained with electrode-flux combinations in accordance with this document. c) Clauses, subclauses and tables which do not have either the suffix letter "A" or the suffix letter "B" are applicable to all solid wire electrodes, tubular cored electrodes and electrode-flux combinations classified in accordance with this document. For comparison purposes, some tables include requirements for electrodes classified in accordance with both systems, placing individual electrodes from the two systems, which are similar in composition and properties, on adjacent lines in the particular table. In a particular line of the table that is mandatory in one system, the symbol for the similar electrode from the other system is indicated in parentheses. By appropriate restriction of the formulation of a particular electrode, it is often, but not always, possible to produce an electrode that can be classified in both systems, in which case the electrode, or its packaging, can be marked with the classification in either or both systems.
Tämän julkaisun valmistelusta Suomessa vastaa Metalliteollisuuden Standardisointiyhdistys ry, puh. 09 19 231 (vaihde).
Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Classification
4.1 General
5 Symbols and requirements
5.1 General
5.2 Symbol for the product or process
5.3 Symbols for the tensile properties of the all-weld metal deposit
5.4 Symbol for the impact properties of the all-weld metal
5.5 Symbol for the type of welding flux
5.6 Symbol for the chemical composition of solid wire electrodes and of the all-weld metal from tubular cored electrode-flux combinations
5.7 Symbol for the post-weld heat treatment
5.8 Optional symbol for hydrogen content of deposited metal
6 Mechanical tests
6.1 Tensile and impact tests
6.2 Preheating and interpass temperature
6.3 Welding conditions and pass sequence
7 Chemical analysis
8 Rounding procedure
9 Retests
10 Technical delivery conditions
11 Examples of designation
Annex A Possible risk of weld metal hydrogen cracking (informative)
ISO 13916:2017 Welding -- Measurement of preheating temperature, interpass temperature and preheat maintenance temperature
ISO 14174:2012 Welding consumables -- Fluxes for submerged arc welding and electroslag welding -- Classification
ISO 14344:2010 Welding consumables -- Procurement of filler materials and fluxes
ISO 13916:2017 Welding -- Measurement of preheating temperature, interpass temperature and preheat maintenance temperature
ISO 14174:2012 Welding consumables -- Fluxes for submerged arc welding and electroslag welding -- Classification
ISO 14344:2010 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 3690:2012 Welding and allied processes -- Determination of hydrogen content in arc weld metal
ISO 544:2017 Welding consumables -- Technical delivery conditions for filler materials and fluxes -- Type of product, dimensions, tolerances and markings
ISO 6847:2013 Welding consumables -- Deposition of a weld metal pad for chemical analysis
ISO 80000-1:2009 Quantities and units -- Part 1: General