The present invention provides the following: a covered flux which has a low chromium content and which can improve the fatigue strength of a weld in additional welding; and a covered electrode. The covered flux used for a covered electrode has a composition that contains, relative to the total mass of the covered flux, 35-55 mass % of a metal carbonate (in terms of CO2), 10-30 mass % of a metal fluoride (in terms of F), and 8.5-20 mass % of Mn and/or 7.5-20 mass % of Ni. In addition, the covered electrode is obtained by coating an iron-based core wire with this covered flux.

Provided are a welded joint of extremely low-temperature steel and flux cored, submerged, and gas metal arc welding materials which can be used to prepare the welded joint, wherein the welded joint of extremely low-temperature steel has outstanding impact toughness in extremely low-temperature conditions and excellent yield strength at room temperature.

The present disclosure provides a welding flux used for austenitic stainless steel, which includes 20-40 wt. % SiC, 20-30 wt. % SiO.sub.2, 15-25 wt. % MoO.sub.3, 2-15 wt. % TiO.sub.2, 2-10 wt. % NiO, and 1-5 wt. % MgO. As such, the welding flux forms a soundness weld with high D/W ratio and surface hardness.

The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). In one embodiment, a tubular welding wire for joining steel workpieces via arc welding includes a steel sheath disposed around a core. The core includes iron powder, iron titanium powder, silico-manganese powder, iron silicon powder, iron sulfide, graphite, rare earth compound, and a frit. The frit includes a Group I or Group II compound, silicon dioxide, and titanium dioxide. The graphite and the frit together comprise less than 10% of the core by weight.

A flux (55) for superalloy laser welding and additive processing (20, 50), including constituents which decompose when heated in a laser induced plasma or to a melt temperature of the superalloy (42), creating one or more gases (46) that blanket the melt to protect it from air, while producing not more than 5 wt. % of slag relative to the weight of the flux. Embodiments may further include compounds providing one or more functions of surface cleaning, scavenging of impurities in the melt, and elemental additions to the superalloy.

In a stainless steel flux cored wire comprising a stainless steel shell and a flux filling the shell, the amount of Si contained in the entire wire is 2.5% by mass or higher, preferably 3.0% by mass or higher in terms of SiO.sub.2, and the amount of at least one compound selected from the group consisting of polytetrafluoroethylene, graphite fluoride and perfluoropolyether contained in the flux is 0.005 to 0.10% by mass of the total mass of the wire in terms of F, preferably 0.020% by mass or higher. By employing such a constitution, in welding of CrNi-based and Cr-based stainless steels and other materials, fume generation and hexavalent chromium leaching can be significantly reduced, and excellent welding workability can be provided.

The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). In one embodiment, a tubular welding wire includes a sheath and a core. Further, the core includes a carbon source and an agglomerate having a Group I or Group II compound, silicon dioxide, and titanium dioxide. Additionally, the carbon source and the agglomerate together comprise less than 10% of the core by weight.

The present disclosure provides a welding flux used for austenitic stainless steel, which includes 20-40 wt. % SiC, 20-30 wt. % SiO.sub.2, 15-25 wt. % MoO.sub.3, 2-15 wt. % TiO.sub.2, 2-10 wt. % NiO, and 1-5 wt. % MgO. As such, the welding flux forms a soundness weld with high D/W ratio and surface hardness.

The present disclosure relates generally to welding and, more specifically, to electrodes for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). A welding consumable includes a metallic sheath surrounding a granular core. The welding consumable includes: approximately 0.35 wt % or less manganese, between approximately 0.1 wt % and approximately 3 wt % nickel, between approximately 2.5 wt % and approximately 10 wt % calcined rutile; and between approximately 0.1 wt % and approximately 2 wt % spodumene, all based on the weight of the welding consumable.

A flux-cored wire for carbon dioxide gas shielded arc welding includes, in terms of % by mass with respect to a total mass of the wire, 0.03 to 0.08% of C, 0.2 to 0.6% of Si, 1.2 to 2.8% of Mn, 0.01 to 0.5% of Cu, 0.2 to 0.7% of Ni, 0.1 to 0.6% of Ti, 0.005 to 0.020% of B, 0.05% or less of Al, 4.0 to 8.0% in terms of TiO.sub.2, 0.1 to 0.6% of in terms of SiO.sub.2, 0.02 to 0.3% in terms of Al.sub.2O.sub.3, 0.1 to 0.8% of Mg, 0.05 to 0.3% in terms of F, 0.05 to 0.3% in terms of Na and K in a fluorine compound, 0.05 to 0.2% of Na.sub.2O and K.sub.2O, and 0.2% or less in terms of ZrO.sub.2.