NF EN ISO 3581, A81-343 (08/2023)

This document specifies requirements for the classification of coated electrodes intended for manual arc welding of stainless steels and resistant to high temperatures, based on the chemical composition of the undiluted weld metal, on the type of electrode coating and other properties of the electrode, as well as on the mechanical properties of the weld metal undiluted, in the as-welded or heat-treated state. This document is a mixed standard that allows classification using a system based on classification by nominal composition or using a system based on classification by alloy type. a) Paragraphs and tables marked “classification according to nominal composition-A” or “ISO 3581-A” are only applicable to products classified according to this system. b) Paragraphs and tables marked “classification according to alloy type-B” or “ISO 3581-B” are only applicable to products classified according to this system. (c) Paragraphs and tables which do not bear either reference are applicable to products classified either according to one of the systems or according to both systems. Annex B provides information on considerations of ferrite content in the weld metal.
(Automatic translation from French)