Metal-core weld wire for welding galvanized steels

A metal-core weld wire usable for gas shielded arc welding low carbon and low alloy galvanized and galvanealed steels, the metal-core weld wire consisting essentially of:

• a low carbon steel sheath;
• and
• a core composition surrounded by the low carbon steel sheath, the core composition including, by total weight of the metal-core weld wire, between approximately 0.30-0.40% Nb, between approximately 0.10-0.20% Ti, and Fe powder;
• between approximately 0.1-1.0% Si,
• wherein the weld wire provides, at weld rates up to 100 cm/min, reduced arc ionization potential and spatter, and improved arc stability and shielding, and
• wherein the weld wire produces, at weld rates up to 100 cm/min, weld deposits having reduced blow holes and porosity, and reduced weld pool surface tension resulting in an improved wetting characteristic.

A metal-core weld wire usable for gas shielded arc welding low carbon and low alloy galvanized and galvanealed steels, the metal-core weld wire comprising:

• a low carbon steel sheath;
• and
• a core composition surrounded by the low carbon steel sheath, the core composition including, by total weight of the metal-core weld wire, between approximately 0.05-0.20% Ti and between approximately 0.05-1.00% Nb, the core composition is, by total weight of the metal-core weld wire, between approximately 2.5-12.0%;
• and
• a trace amount of Ni,
• wherein the weld wire provides, at weld rates up to 100 cm/min, reduced arc ionization potential and spatter, and improved arc stability and shielding, and
• wherein the weld wire produces, at weld rates up to 100 cm/min, weld deposits having reduced blow holes and porosity, and reduced weld pool surface tension resulting in an improved wetting characteristic.