GAS SHIELDED ARC WELDING SOLID WIRE FOR WEATHERABLE STEEL AND GAS SHIELDED ARC WELDING METHOD USING THE SAME

摘要

A gas shielded arc welding solid wire for weatherable steel and a gas shielded arc welding method using the same are provided to improve weatherable properties, low temperature tenacity, strength and crack resistance by controlling components of the solid wire within the certain range. A welding solid wire comprises a C of 0.01weight % to 0.12weight %, Si of 0.20weight % to 1.00weight %, Mn of 1.00weight % to 2.00weight %, P of 0.007weight % to 0.030weight %, S of 0.025weight % or less, Cu of 0.30weight % to 0.60weight %, Cr of 0.50weight % to 0.80weight %, Al of 0.020weight % or less, Ti of 0.05weight % to 0.17weight %, Mo of 0.10weight % or less, N of 0.0090weight % or less, and O of 0.0150weight % or less. The welding solid wire further comprises at least one of Ni of 0.05weight % to 0.80weight %, B of 0.0005weight % to 0.0030weight % and K of 0.5ppm to 20ppm.