| 摘要 |
The invention concerns a core wire for welding under a protective gas flow, in particular of the rutile or slagless type, comprising an outer metal sheath and a central core comprising filler elements and a method for MAG welding under a protective gas flow using such a core wire to produce a weld joint on a steel structure, such as an offshore platform or a storage tank. The resulting weld joint has improved impact strength and a toughness and contains less than 65 ppm of nitrogen, 300 ppm to 0.12 % carbon, 0.01 % to 0.6 % silicon, 0.9 % to 1.9 % manganese, 20 ppm to 0.08 % titanium, 1 ppm to 80 ppm of boron, 5 ppm to 150 ppm of aluminium, 10 ppm to 0.02 % niobium, and 10 ppm to 0.02 % vanadium.
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