I. Structure and Materials
The aluminum stranded wire is entirely composed of multiple strands of pure aluminum round wire concentrically twisted together, without a steel core or other metals. The outer strands are oriented in the opposite direction to the inner strands, ensuring structural stability and preventing loosening. Compared to a single aluminum rod, multi-strand twisting significantly improves flexibility, facilitating installation and wiring; it also increases the heat dissipation area.

II. Core Performance and Characteristics

Electrical Performance: Conductivity is approximately 61% that of copper, but density is only 1/3 that of copper. Conductivity per unit weight is superior to copper, with moderate line loss. A dense alumina film easily forms on the surface, providing some corrosion resistance (superior to bare steel wire, but weaker than aluminum alloy/aluminum-clad steel).

2.Mechanical Performance: Tensile strength is lower than that of aluminum steel-cored stranded wire (ACSR), making it unsuitable for long-span, high-tension lines; lightweight, resulting in low installation costs.

Economic Performance: Aluminum resources are abundant, and the price is far lower than copper, making it a cost-effective choice for low-voltage distribution networks; however, the tension section and span are limited by mechanical strength.

Temperature and Environment: Long-term operating temperature generally does not exceed 80℃; in highly corrosive environments such as coastal areas and chemical industrial zones, additional anti-corrosion treatment or the use of corrosion-resistant aluminum alloy stranded wire is required.

3. Classification and Models

By Material: Pure aluminum stranded wire (LJ/JL), all-aluminum alloy stranded wire (AAAC, higher strength, suitable for medium spacing);

By Structure: Concentric single-layer/multi-layer stranded;

By Standard: National Standard (GB/T 1179-2008), IEC, ASTM, etc.;

Common Specifications: Nominal cross-sections range from 16 mm² to 800 mm², adapting to different current carrying capacity requirements.