DIN EN ISO 636:2016-05

This International Standard provides a classification for the designation of rods and wires according to their chemical composition and, where necessary, according to the yield strength, tensile strength and elongation at break of the pure weld metal. The ratio of yield strength to tensile strength of the weld metal is generally higher than that for the base metal. It should therefore be noted that a weld metal that achieves the yield strength of the base metal does not necessarily achieve its tensile strength. If the application requires a matching tensile strength between the weld metal and the base metal, Column 3 of Table 1A or Table 1B should be considered when selecting the filler metal. It should be noted that the mechanical properties of the pure weld metal used for the classification of rods and wires may differ from those achieved on finishing welds. This is due to differences in the execution of welding, such as diameter, pendulum width, welding position and material composition. The classification according to system A is mainly based on EN 1668:1997. The classification according to system B is mainly based on standards applied in the Pacific region. This International Standard specifies requirements for classification of rods and wires in the as-welded condition and in the post-weld heat-treated condition for tungsten inert gas welding of non-alloy and fine-grain steels with a minimum yield strength of up to 500 MPa or a minimum tensile strength of up to 570 MPa. This International Standard is a combined specification providing 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 the tensile strength and the average impact energy of 27 J of all-weld metal. a) Paragraphs and tables which carry the suffix letter "A" are applicable only to rods and wires classified to the system based upon the yield strength and the average impact energy of 47 J of all-weld metal in accordance with this International Standard. b) Paragraphs and tables which carry the suffix letter "B" are applicable only to rods and wires classified to the system based upon the tensile strength and the average impact energy of 27 J of all-weld metal in accordance with this International Standard. c) Paragraphs and tables which have neither the suffix letter "A" nor the suffix letter "B" are applicable to all rods and wires classified in accordance with this International Standard. The committee responsible for this standard is NA 092-00-03 AA "Schweißzusätze (DVS AG W 5)" ("Welding consumables (DVS AG W5)") at DIN.