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. The tubular welding wire is configured to form a weld deposit on a structural steel workpiece, wherein the weld deposit includes less than approximately 2.5% manganese by weight.

The invention relates to a coated electrode comprising a central metal core being surrounded at least in part by an outer coating containing rutile and at least one lithium-based compound and being free of sodium feldspar and potassium feldspar. According to the invention, the electrode comprises at least one inner coating arranged between the outer coating and the central metal core, said inner coating containing at least one sodium-based compound and/or at least one potassium based compound. Associated process for welding stainless steel.

The invention provides an ignition flux for arc stud welding, including 30-55 wt % SiO.sub.2, 30-55 wt % NiO, 10-35 wt % AlF.sub.3, and 5-25 wt % NiF.sub.2, or including 30-55 wt % TiO.sub.2, 30-55 wt % NiO, 10-35 wt % AlF.sub.3, and 5-25 wt % NiF.sub.2. As such, the electric arc can be easily created and smoothly formed. The invention further provides an arc stud welding method utilizing such ignition flux. As such, the fastener and the metal workpiece can be tightly connected together without the need of inserting an ignition tip into the welding portion of a fastener.

This 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) of zinc-coated workpieces. In an embodiment, a welding consumable for welding a zinc-coated steel workpiece includes a zinc (Zn) content between approximately 0.01 wt % and approximately 4 wt %, based on the weight of the welding consumable. It is presently recognized that intentionally including Zn in welding wires for welding galvanized workpieces unexpectedly and counterintuitively alleviates spatter and porosity problems that are caused by the Zn coating of the galvanized workpieces.

Provided is a flux-cored wire for gas-shielded arc welding that contains, per wire total mass, specific amounts of C, Mn, TiO.sub.2 and specific amounts or less of P and S, and contains, in the flux, a specific amount of Ni per wire total mass. The Ni has a ratio (1/2) of 0.50-1.00 when 1 (mass %) is the content per wire total mass of particles having a size of 106 m or less and 2 (mass %) is the content per wire total mass of particles having a size exceeding 106 m.

A flux-cored wire for gas shielded arc welding is provided which affords excellent welding workability for high heat input welding and enables weld metal having good mechanical properties to be obtained. The flux-cored wire for gas shielded arc welding includes C, Mn, Si, elemental Ti, elemental Al, Fe, ZrO.sub.2, TiO.sub.2, and NaF, each within a predetermined range relative to the total mass of the wire. In the flux-cored wire, 1[ZrO.sub.2]/[NaF]50 is satisfied, where [ZrO.sub.2] is the ZrO.sub.2 content, and [NaF] is the NaF content.

A flux-cored wire for gas-shielded arc welding, contains, based on the total mass of the wire: C: from 0.03 to 0.12 mass %; Si in terms of Si in Si alloy and Si compound: from 0.10 to 0.50 mass %; Mn: from 1.0 to 4.0 mass %; Ti in terms of Ti in Ti alloy and Ti compound: from 2.4 to 4.5 mass %; Al: from 0.005 to 0.050 mass %; at least one of Ni: from 0.30 to 3.50 mass % and B: from 0.0008 to 0.012 mass %; and Fe: 80 mass % or more, and satisfies (Ti+Mn+Al)/Si15.

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. The tubular welding wire is configured to form a weld deposit on a structural steel workpiece, wherein the weld deposit includes less than approximately 2.5% manganese by weight.

A Ni based alloy flux cored wire including a Ni based alloy as a sheath is provided, wherein the sheath contains predetermined ranges of Ni, Cr, Mo, Ti, Al, and Mg relative to the total mass of the sheath, control is made to ensure predetermined C and Si, the composition of the whole wire, which is the sum total of the sheath components and flux components enveloped in the sheath, contains predetermined ranges of Ni, Cr, Mo, Mn, W, Fe, Ti, Al, and Mg relative to the total mass of the wire, and control is made to ensure predetermined C, Si, Nb, P, and S.

Provided is a flux for submerged arc welding that has good welding workability and can reduce the diffusion hydrogen content in a weld metal using either an AC or a DC welding power source. The flux includes Al.sub.2O.sub.3: 15 to 35% by mass; SiO.sub.2: 10 to 30% by mass; MgO: 10 to 25% by mass; F expressed in terms of CaF.sub.2: 10 to 25% by mass; Mn expressed in terms of MnO: 3 to 20% by mass; Na expressed in terms of Na.sub.2O and/or K expressed in terms of K.sub.2O: 0.5 to 4.5% by mass in total; Fe expressed in terms of FeO: 0.5 to 8% by mass; and CaO: 6% by mass or less. A water-soluble SiO.sub.2 in the flux is less than 1% by mass. In addition, the flux has a composition that satisfies the following formula: 0.2[Mg/O]/([Al.sub.2O.sub.3]+[MnO])0.8.