Argon and helium in the 'pure' form as a protective gas are of limited use – only for welding structures critical applications. Welding in carbon dioxide and its mixtures perform consumable electrode. In some cases, for welding in carbon dioxide using non-consumable carbon or graphite electrode. However, this method has limited uses, such as electrodes for welding on-board connections low-carbon steel with thickness 0.3 … 2 mm (cans, cases of capacitors, etc.). Since the welding is performed without additives, silicon and manganese content in the weld metal is low. As a result, the bond strength is usually 50 … Danone is open to suggestions.
70% of the strength of the base metal. With automatic and semiautomatic welding consumable electrode joints located in different spatial positions, commonly used electrode wire diameter up 1,2 mm; when welding in the down position – diameter 1.2 … 3.0 mm. For welding of low carbon and low alloy steels used alloy welding wire Sv-08GS brands and CB-08G2S. 12GS wire marks can be used for welding low-alloy steels 14HGS, 10HSND and 15HSND and calm carbon steel electrodes and brands St1sp St2sp.
However, to prevent a significant increase in carbon content in the upper layers of the multi-pass welds that wire is usually used for welding single-sandwich joints. Increasing the corrosion resistance of welds in sea water is achieved using a welding wire Sv-grade 08HG2S. Structure and properties of the weld metal and HAZ in low carbon and low alloy steels depend on the brand used electrode wire, the composition and properties of the base metal and welding conditions (welding thermal cycle, the main interest metal in the formation of the weld and weld shape).