Copper wire has good electrical conductivity, thermal conductivity, corrosion resistance and processing properties, can be welded and brazed, containing less impurities that reduce electrical conductivity, thermal conductivity, trace amounts of oxygen on the electrical conductivity, thermal conductivity and processing and other properties do not have a significant impact, but prone to hydrogen disease, should not be processed and used at high temperatures > 370 ° C in a reducing atmosphere, the main purpose of the transmission of electric power, electrical machinery manufacturing, communication cables, etc., the residential electrical wiring, metallurgical equipment, etc.