Indeed, this issue is too esoteric, in general, and are based on base metal strong wire, the tensile strength of not less than the base metal, and then there are, according to the chemical composition, CO2 is the oxidizing gas, welding materials at high temperatures easily oxidized general welding consumables metal manganese and silicon for deoxidation, but I see wire packaging wire chemical composition and mechanical properties of the annotation, just look at the grades look could not, of course, and like 308,309,316 L, etc. These are know, is not easy to say these materials like Q235, Q345 wire selection, because too many manufacturers of wire, wire the name of different manufacturers of the same performance is also achieved, what Tom, Dick and Harry Wang Mazi ....... hey! unclear. example: Q235 tensile value of 375-500, according to the different its value of A, B, C, D level is also different, generally with a tensile value of 490 wire, as you want me to say the wire of the grades that really want to collect a lot of welding wire manufacturer product information, I am also considering this problem, and so have the answer to tell you, ah!