This wire for gas-shielded arc welding is a wire for joining a plurality of thin steel sheets by gas-shielded arc welding, the wire including, in mass %, with respect to a total mass of the wire: C: 0.06 to 0.15%; Si: more than 0 to 0.18%; Mn: 0.3 to 2.2%; Ti: 0.06 to 0.30%; Al: 0.001 to 0.30%; and B: 0.0030 to 0.0100%, in which Si, Mn, Ti, and Al satisfy Expressions (1) and (2).

SiMn0.30Expression (1)

(Si+Mn/5)/(Ti+Al)3.0Expression (2)

A flux-cored wire for gas shielded arc welding may contain, based on total mass of the wire: Fe: 78 mass % or more; TiO.sub.2: 4 mass % to 13 mass %; Mn: 1.0 mass % to 2.4 mass %; Cr: 1.0 mass % to 3.0 mass %; Mo: 0.2 mass % to 1.2 mass %; Si: 0.1 mass % to 0.8 mass %; Mg: 0.1 mass % to 1.0 mass %; fluoride (F conversion value): 0.05 mass % to 0.25 mass %; C: 0.01 mass % to 0.10 mass %; V: 0.003 mass % to 0.020 mass %; Nb: 0.003 mass % to 0.020 mass %; and B: less than 100 ppm (including 0 ppm). The contents of Mn, C, and V based on total mass of the wire may satisfy a relationship of 28Mn/(390C+2370V)0.82.

A metal strip is provided having a casting-wheel side that has been solidified on an outer surface of a heat sink, an opposing, air side and a microstructure. The microstructure is at least 80 vol. % amorphous or has at least 80 vol. % nanocrystalline grains and a residual amorphous matrix in which at least 80% of the nanocrystalline grains have an average grain size of less than 50 nm and a random orientation. The air side of the metal strip has a surface crystallisation proportion of less than 23%.

A gas-shielded arc welding method includes feeding a consumable electrode via a welding torch and performing welding while flowing a shielding gas. The welding torch includes a nozzle. An inner diameter of the nozzle is 15 mm or more. A nozzle-base material distance between a tip of the nozzle and a material to be welded is 22 mm or less. A ratio expressed by (the inner diameter of the nozzle/the nozzle-base material distance) is 0.7 or more and 1.9 or less.

A welding wire for high-strength steel for improving slag coagulation includes a combination of Carbon, Manganese, Silicon, Aluminum, Sulfur, and Selenium. With use of the welding wire, the generation of slag is minimized, and the slag is allowed to induce the generation of crystalline oxides having a low surface energy, so that the slag is easily removed, and the flow of a molten pool to the center in a width direction of a weld bead do that the slag is coagulated.

A flux-cored wire with a steel sheath filled with flux, including based on a total mass of the wire, C: 0.026% to 0.060% by mass, Si: more than 0% to 0.50% by mass, Mn: 1.3% to 2.8% by mass, Cu: 0.20% to 1.50% by mass, Ni: 0.45% to 1.00% by mass, Mo: 0.15% to 0.65% by mass, Mg: 0.30% to 0.65% by mass, and B: 0.001% to 0.010% by mass. Provided that Cr: 0.10% by mass or less and Al: 0.10% by mass or less. A Nb content [Nb] of the wire expressed in % by mass based on the total mass of the wire and a V content [V] of the wire expressed in % by mass based on the total mass of the wire satisfy [Nb]+[V]=0.015 or less.

A solder ball according to the present invention contains 0.2 to 2.2% by mass of Zn, and a balance of Sn, and has a spherical diameter of 0.1 to 120 m and a yellowness (b*) in an L*a*b* color system of 2.70 or more and 9.52 or less. An oxide film is formed by performing aging treatment. By producing a solder ball having a yellowness of 2.70 or more and 9.52 or less, it is possible to suppress the growth of a Cu.sub.3Sn layer and/or a CuZn(Sn) layer during joining.

Systems and methods for low-manganese welding alloys are disclosed. An example arc welding consumable may comprise: less than 0.4 wt % manganese; strengthening agents selected from the group consisting of nickel, cobalt, copper, carbon, molybdenum, chromium, vanadium, silicon, and boron; and grain control agents selected from the group consisting of niobium, tantalum, titanium, zirconium, and boron. The grain control agents may comprise greater than 0.06 wt % and less than 0.6 wt % of the welding consumable. The resulting weld deposit may comprise a tensile strength greater than or equal to 70 ksi, a yield strength greater than or equal to 58 ksi, a ductility (as measured by percent elongation) of at least 22%, and a Charpy V-notch toughness greater than or equal to 20 ft-lbs at 20 F. The welding consumable may provide a manganese fume generation rate less than 0.01 grams per minute during the arc welding operation.

A tubular welding electrode for arc welding that has improved crack resistance comprises a steel sheath disposed around a granular powder flux fill core. The granular powder flux fill core comprises magnesium oxide and a sulfur source such as iron sulfide.

A welding wire is disclosed including a ferrous metal welding material and a flux material including flux ingredients. The flux ingredients include, in weight percent based on the total weight of the welding wire: no greater than 1.91 aluminum, no greater than 1.02 manganese, less than 1.50 magnesium, and no greater than 0.02 rare earth metal oxide, where the rare earth metal oxide comprises at least 99 wt % cerium oxide based upon total weight of rare earth metal oxide. Resulting welds have a maximum diffusible hydrogen content of 5 mL/100 g or less. Resulting welds also have a Charpy V-notch toughness at 40 F. of at least 100 ft-lbs (135.6 Joules).