Due to the different production of copper rod technology, the production of copper rod oxygen content and appearance is different. The copper rod produced by the up-cast method, with proper technology and oxygen content below 20ppm, is called oxygen-free copper rod.The copper rod produced by sequential cast-rolling method is hot rolled under the condition of protection. The oxygen content is in the range of 200-500ppm, but sometimes it is as high as 700ppm. Generally speaking, the copper produced by this method has bright appearance, commonly known as bright rod.
An oxygen free copper rod is pure copper that contains neither oxygen nor any deoxidizer residue. But it actually contains very little oxygen and some impurities. According to the standard, the content of oxygen should not be greater than 0.02%, the total content of impurities should not be greater than 0.05%, and the purity of copper should be greater than 99.95%.
Generally, people use electrolytic copper production, the resistivity is lower than the low oxygen copper rod, so in the production of resistance requirements on the more stringent products, the anaerobic copper rod is more economical; The raw materials of oxygen free copper rod requires higher quality; Anaerobic copper rod appears more superior is drawn diameter < 0.5mm copper wire. The oxygen free copper rod is used to produce copper flat wire. The oxygen - free copper rod for wire drawing, production of wire copper core, enameled wire. It is mainly used for wire, cable and motor.
According to the oxygen content and impurity content, oxygen free copper rod is divided into TU1 and TU2 copper rod. TU1 oxygen free copper rod purity reached 99.99%, oxygen content is not more than 0.001%; TU2 oxygen-free copper purity reached 99.95%, oxygen content is not more than 0.002%.
Post time: Apr-28-2020