Explanation

Also known as purple copper, it is an industrial metal copper with a purity higher than 99.5%. Usually competes for purple red. pure copper has excellent conductivity, heat conduction, corrosion resistance and weld properties. It has a certain strength and is widely used in conductive, thermal, and corrosion-resistant devices. The conductivity of pure copper at room temperature is only inferior to that of silver. resistivity cm of high-purity copper (99.99%) at 20 ° C. pure copper can be divided into three categories: ① addition and purple copper. There are four grades of purple copper, namely No.1, No.2, No.3 and No.4. The purity is 99.95%, 99.90%, 99.70% and 99.5% respectively; ② oxygen-free copper and deoxidation copper. There are two kinds of oxygen-free copper, No. 1 and No. 2, with oxygen content less than 0.003%. deoxidation copper is divided into phosphorus deoxidation copper and manganese deoxidation copper, with oxygen content less than 0.001%, and residual manganese content 0.1%~0.3%.

Classification