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 includes less than approximately 0.4% manganese metal or alloy by weight, and the tubular welding wire is configured to form a weld deposit having less than approximately 0.5% manganese by weight.

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 flux-cored wire for arc welding of a duplex stainless steel includes a stainless-steel sheath filled with a flux and contains, with respect to the total mass of the wire, predetermined amounts of Cr, Ni, Mo, N, Mn, and Si, in which letting a Ti alloy content in terms of Ti be [Ti] and letting an Al alloy content in terms of Al be [Al], [Ti] and [Al] are predetermined values, and in which parameter A expressed as A=[Ti]+2[Al] satisfies a predetermined value, and the balance is composed of Fe, a slag-forming component, and incidental impurities.

A self-shielded flux-cored welding wire with a special protective slag coating formed in situ and a manufacture method thereof. The self-shielded flux-cored welding wire includes a low-carbon steel belt and a flux core powder, the flux core powder is filled in the low-carbon steel belt, the flux core powder includes the following ingredients in percentage by mass: 60-80% glass powder, 2-8% zirconium oxide powder, 0.05-0.85% graphene powder, 2-8% potassium carbonate sodium powder, 1-3% potassium titanate powder, 2-5% rutile powder, 1-5% corundum powder, 1-3% sodium fluorosilicate powder, and the balance of iron powder, and a weight of the flux core powder accounts for 13-25% of a total weight of the welding wire.

An austenitic-ferritic stainless steel welding material, comprising in weight %: C: <0.02 Si: <0.45 Mn: 1.60-2.05 P: <0.03 S: <0.03 Cr: 18.5-25 Ni: 8.5-10.5 Mo: <0.75 10 Co: <0.2 Cu: <0.75 N: 0.12-0.3 the balance being Fe and incidental impurities.

The invention described herein pertains generally to a process for making boric acid free flux compositions in which boric acid and/or borax is substituted with a molar equivalent amount of potassium tetraborate tetrahydrate. In some embodiments, a phthalocyanine pigment is used to affect a color change at activation temperature.

The invention described herein pertains generally to boric acid free flux composition in which boric acid and/or borax is substituted with a molar equivalent amount of potassium tetraborate tetrahydrate. In some embodiments, a phthalocyanine pigment is used to effect a color change at activation temperature.

Provided is a metal powder sintering paste having a high resistance to thermal stress. The present invention provides a metal powder sintering paste containing silver particles having an average particle diameter (median diameter) of 0.3 m to 5 m as a main component, further containing inorganic spacer particles having a CV value (standard deviation/average value) of less than 5%, and containing substantially no resin.

A flux-cored wire for gas-shielded arc welding has a steel outer sheath filled with a flux. The flux-cored wire includes specific amounts, relative to a total mass of the wire, of TiO.sub.2, at least one of Si, an Si oxide and an Si compound, C, Mn, Mo, Ni, at least one of metal Mg and an Mg alloy, an F compound, a K compound, an Na compound, B and a B compound, and Fe, respectively. A total content of each of Ti and a Ti alloy, metal Al and an Al alloy, and V is restricted to the specific range, respectively. A content of Ti is also restricted to the specific range relative to the total mass of the steel outer sheath.

In a mixed composition coating material for brazing, when a total mass of a solid material, an organic solvent, and water is defined as 100 mass %, the solid material are contained in an amount of 30 mass % or greater and 80 mass % or less with respect to the whole coating material, the organic solvent and the water is contained in a total amount of 20 mass % or greater and 70 mass % or less with respect to the whole coating material, and the water is contained in an amount of 0.4 mass % or greater and 2.5 mass % or less with respect to the whole coating material.