NF EN ISO 18276, A81-352 (07/2024)

ISO 18276:2017 specifies requirements for the classification of cored wire electrodes for arc welding with or without shielding gas for the as-welded state or for the heat-treated state after welding of high-temperature steels. strength having a minimum yield strength greater than 550 MPa or a minimum tensile strength greater than 590 MPa. A wire electrode can, if necessary, be tested and classified with different shielding gases. ISO 18276:2017 proposes a mixed specification allowing classification using a system based either on the yield strength and the average fracture energy of 47 J for the undiluted molten metal, or on the tensile strength and average fracture energy of 27 J for the undiluted molten metal. 1) Subclauses and tables bearing the suffix “A” are applicable only to cored wire electrodes classified according to the system based on the yield strength and the average breaking energy of 47 J for the metal melted undiluted in accordance with this International Standard. 2) Subclauses and tables bearing the suffix “B” are applicable only to cored wire electrodes classified according to the system based on tensile strength and average breaking energy of 27 J for metal melted out of dilution in accordance with ISO 18276:2017. 3) Subclauses and tables which do not bear the suffix “A” or the suffix “B” are applicable to all cored wire electrodes classified in accordance with this International Standard. It is known that the operating characteristics of a cored wire electrode can be modified by the use of pulsed current but, for the purposes of this document, pulsed current is not used for determining the classification of 'a wire electrode.
(Automatic translation from French)