C10200 copper strip is a high-purity oxygen-free copper material with a copper content of more than 99.95%, no oxygen and deoxidizer residues, and trace impurities, such as oxygen content not exceeding 0.03%, and total impurity content not exceeding 0.05%. This material has excellent electrical and thermal conductivity and is widely used in the electric vacuum industry, high-power transmitting tubes, magnetrons, traveling wave tubes, vacuum capacitors, vacuum switches and other equipment for high-temperature brazing to avoid intergranular cracks and vacuum product leakage caused by the reaction of hydrogen and copper.