What is the standard of YJ502-1 CO2 welding wire?

Answer:

GB GB/T 10045-2001 E501T-1, equivalent to AWS A5.20 E71T-1C.Welding wire Description: welding wire is used as filler metal or as a conductive wire welding material. In gas welding and gas tungsten arc welding, welding wire used as filler metal; in submerged arc welding, electroslag welding and MIG arc welding, welding wire as filler metal, and conductive electrode. The surface of the wire is not coated with anti oxidizing flux.

You're talking about YJ501-1, right?GB GB/T 10045-2001 E501T-1Equivalent to AWS A5.20 E71T-1C

YJ502-1 conforms to GB/T 10045, GB, E501T-1CO2 gas shielded wire flux cored wire, used for all position welding, can be vertical down welding, welding spatter, arc stability, less smoke, for carbon steel, 500MPa grade high-strength steel and 14MnNbq welding.