Bare Strand Copper Wire

Bare copper wire: Bare copper wire includes hard drawn solid copper wire, hard drawn stranded wire, annealed solid copper wire, and annealed stranded wire. Hard copper wire is drawn from copper wire under normal pressure and has high conductivity and tensile strength. Annealed copper wire is obtained by heating hard drawn copper wire in a vacuum furnace, which has better flexibility and conductivity than hard drawn wire. Tin plated copper wire: Tin plating on the surface of copper wire increases weldability, protects copper conductors from corrosion during PVC or rubber insulation extrusion operations, and prevents insulation rubber from aging.
Pure copper without oxygen or any residual deoxidizer. But in reality, it still contains very trace amounts of oxygen and some impurities. According to the standard regulations, the oxygen content should not exceed 0.003%, the total impurity content should not exceed 0.05%, and the purity of copper should be greater than 99.95%.
According to the oxygen content and impurity content, oxygen free copper is divided into first and second oxygen free copper. The purity of No.1 oxygen free copper reaches 99.97%, with an oxygen content not exceeding 0.003% and a total impurity content not exceeding 0.03%; The purity of oxygen free copper No.2 reaches 99.95%, with an oxygen content not exceeding 0.003% and a total impurity content not exceeding 0.05%. Oxygen free copper has no hydrogen embrittlement phenomenon, high conductivity, good processing and welding performance, corrosion resistance, and low temperature performance. The standards for oxygen content are not completely the same among countries, and there are certain differences. OFC (Oxygen Free Copper): Metal copper with a purity of 99.995%. Generally used in electrical and electronic applications such as audio equipment, vacuum electronic devices, cables, etc. Among them, there are LC-OFC (linear crystalline oxygen free copper or crystalline oxygen free copper) with a purity of over 99.995% and OCC (single crystal oxygen free copper) with the highest purity of over 99.996%, which are further divided into PC-OCC and UP-OCC. Single crystal oxygen free copper manufactured using UP-OCC technology (Ultra Pure Copper by Ohno Continuous Casting Process) has non directionality, high purity, corrosion resistance, and extremely low electrical impedance, making the wire suitable for high-speed and high-quality signal transmission

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