In industrial power supply systems, the conductivity of tubular  conductor bar directly affects the stability and efficiency of power transmission. As the core component of the conductor bar, the material selection of the conductor plays a decisive role in the overall performance. The resistivity, corrosion resistance, and mechanical strength of different metal materials vary, and understanding these characteristics can help select suitable conductor materials based on actual needs.

　　Copper is currently a widely used conductor material due to its low electrical resistivity and good ductility. The conductivity of pure copper is about 58MS/m, which can effectively reduce losses during the transmission of electrical energy. Tin plated copper material is more commonly used in humid or corrosive environments, as the tin layer can prevent copper oxidation and extend its service life. Compared to copper, aluminum has slightly lower conductivity but is lighter in weight, making it suitable for long-distance overhead installations. However, aluminum conductors are prone to oxidation and usually require special treatment or use in conjunction with antioxidants.

　　In addition to basic conductivity, conductor materials also need to consider mechanical strength and wear resistance. For example, certain special alloys can improve hardness and tensile strength while maintaining good conductivity, making them suitable for applications with high vibration or frequent movement. Although stainless steel has lower conductivity than copper and aluminum, its significant corrosion resistance gives it a unique advantage in harsh environments such as chemical and marine environments.

　　Temperature changes can also affect the performance of conductors. The temperature coefficient of resistance of copper is about 0.0039/℃. When the ambient temperature increases, the resistance will significantly increase, resulting in additional energy consumption. Therefore, under high temperature conditions, it may be necessary to choose special alloys with lower temperature coefficient of resistance or compensate by increasing the cross-sectional area of the conductor.

　　Surface treatment of conductors is equally important. A smooth surface can reduce the contact resistance of the current collector, while certain coatings can both prevent corrosion and improve contact performance. For example, although silver plating has a higher cost, it has significant effects in high-precision situations that require lower contact resistance.

　　When selecting conductor materials in practice, it is necessary to comprehensively consider cost, environmental conditions, and performance requirements. Although conductivity is the primary factor, corrosion resistance, mechanical strength, and ease of installation and maintenance cannot be ignored. By selecting materials reasonably and maintaining regularly, it is possible to ensure the long-term stable operation of the conductor bar and provide reliable power guarantee for industrial production.