Characteristic and applicable scale of copper rod: It has good conductivity, heat conductivity, corrosion resistance and processing properties, and can be welded and brazed. Low conductivity and thermal conductivity impurities are less. Trace oxygen has little effect on conductivity, thermal conductivity and processing properties, but it is easy to cause "hydrogen disease" and is not suitable for processing (annealing, welding, etc.) and utilization in low temperature (e.g. > 370 C) restoring atmosphere. 2. Chemical composition of copper rod: copper + silver CuAg: >99.90, tin Sn: ==0.002, zinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinzinnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnicnic10 (%): > 5 elongation Rate of Delta 5 (%): > 10 Notes: Longitudinal room temperature tensile mechanical properties of bar size: diameter or opposite edge interval 5-404, heat treatment standard of copper bar: hot working temperature 900-1050 (%); annealing temperature 500-700 (%); recrystallization start temperature 200-300 (%) of cold-softened copper.