Why Use Aluminum Strip for Cable Armouring?
2026-06-04
Cable armor is a core mechanical protective structure ensuring the long-term safe operation of power, communication, and industrial control cables. It primarily protects against physical damage caused by dragging during installation, underground compression, and environmental weathering. With the upgrading and iteration of modern cable engineering, aluminum strip has become the mainstream core material for cable armouring, widely applicable to medium and low voltage power cables, precision control cables and communication optical cables. Compared to traditional armor materials, aluminum strip, with its standardized mechanical parameters, stable physical properties, and excellent process adaptability, is suitable for automated mass production and complex engineering conditions, making it a cost-effective and reliable armor solution in the current industrial field.
Non-magnetic and low-loss are the core technological advantages of aluminum strip and a rigid standard for power cable material selection. Dedicated 5000 series aluminum strip for cable armoring is a pure non-magnetic material with a permeability approaching 1, completely avoiding eddy current losses and hysteresis heating problems generated during alternating current operation. Under actual operating conditions, aluminum strip armored cables can reduce operating temperature rise by 8-15℃, significantly reduce transmission losses, effectively delay insulation aging, and extend the overall service life of the cable by more than 30%. They perfectly adapt to the cable operation requirements of all scenarios, including power frequency distribution and high-frequency communication, and are compatible with various high-precision power transmission engineering standards.
Aluminum strip possesses excellent physical parameters of lightweight and balanced strength, making it highly adaptable to engineering applications. The density of aluminum strip for cable armouring is consistently between 2.66-2.68 g/cm³, only one-third that of traditional steel materials, significantly reducing the overall weight of the cable, alleviating the load-bearing pressure on cable trays, overhead lines, and tunnels, and lowering engineering construction and supporting infrastructure costs. The industry-leading 5052, 5154, and 5154A aluminum strips, after H22/H32 heat treatment, maintain a tensile strength of 180-260MPa and an elongation of ≥12%. They achieve an extremely small bending radius of 1.2 times the thickness of the sheet, making them less prone to breakage under high-speed wrapping and repeated bending conditions. They effectively resist external impacts from mechanical dragging and soil compression, fully meeting the national standard requirements for cable armor protection levels.
The cable armored aluminum strips possess stable corrosion resistance, suitable for all working conditions, both outdoor and underground. A uniformly thick, dense alumina passivation film can spontaneously form on the material surface, with a stable and controllable film thickness, providing excellent resistance to moisture, salt spray, and mild acid and alkali corrosion. In harsh conditions such as high salt spray in coastal areas, damp underground soil, and damp wells, they can maintain structural integrity for extended periods, without rust or damage risk. Compared to traditional materials, aluminum strip requires no secondary anti-corrosion treatment, exhibits superior weather resistance, and significantly reduces the later maintenance costs of cables, making it suitable for long-term applications such as underground burial and outdoor laying.
In terms of manufacturing processes, cable armored aluminum strip boasts extremely high processing precision. Standardized mass-produced aluminum strip thickness tolerance can be controlled within ±0.01mm, edge burrs ≤0.03mm, and the surface is smooth without pinholes or scratches, perfectly adapting to high-speed automated armoring production lines. The material exhibits excellent forming stability, high wrapping fit, and no warping or gaps, ensuring the integrity and sealing of the cable armor layer. Furthermore, aluminum supports 100% recycling, aligning with industrial low-carbon development standards and demonstrating outstanding comprehensive engineering value. As a professional aluminum strip manufacturer, Haomei Aluminum can precisely customize aluminum strips for cable armouring of various specifications, with batch deviations in mechanical properties ≤3%, providing global cable companies with high-precision, highly stable armoring substrate solutions.