High-performance weather-resistance welding rod for coating-free weather-resistance bridge steel

The invention relates to a high-performance weather-resistance welding rod for coating-free weather-resistance bridge steel and belongs to the technical field of welding materials. The high-performance weather-resistance welding rod is especially suitable for manual welding of weather-resistance steel plates with the yield strength being the 420-620 MPa grade. The welding rod is composed of a coating and a core wire, wherein the chemical components of deposited metal of the core wire include, by mass percent, 0.010-0.085 of C, 0.1-0.4 of Si, 0.8-1.50 of Mn, 0.15-0.45 of Cr, 0.8-1.50 of Ni, 0.2-0.4 of Cu, 0.02-0.09 of Ti, 0.001-0.003 of B, smaller than or equal to 0.015 of S, smaller than or equal to 0.015 of P and the balance being Fe and inevitable impurities. The high-performance weather-resistance welding rod has the advantages that the components of the deposited metal of the core wire are reasonable in design, the deposited metal obtained after welding and a welding connector havegood comprehensive perfo