Cable Armoring Aluminum Alloy Strip / Aluminum Strip

In power transmission, communication networks, and industrial wiring systems, the long-term stable operation of cables relies on a strong and reliable protective layer. Aluminum alloy strips for cable armoring, with their core advantages of lightweight, high toughness, non-magnetic properties, and excellent corrosion resistance, are rapidly replacing traditional galvanized steel strips. They have become the mainstream armoring material for medium- and high-voltage cables, special cables, and aluminum alloy interlocked cables-providing comprehensive protection in terms of mechanical strength, electromagnetic shielding, and environmental resistance. They are a key foundational material for the upgrading of the modern cable industry.

What is Aluminum Alloy Strip for Cable Armoring?

A cable typically consists of conductor, insulation layer, bedding layer, armoring layer, and outer sheath from inside to outside. The armoring layer is located outside the bedding layer and directly withstands external mechanical stress.

Aluminum alloy strip for cable armoring is a high-precision product manufactured through cold rolling or hot rolling processes. It is specifically designed for cable and optical cable armoring layers. During cable production, the strip is longitudinally or helically wrapped around the cable to form a strong protective layer.

This "armor" not only resists external mechanical pressure, impact, and rodent damage but also provides electromagnetic shielding and leakage protection.

Armored cable aluminum strips are typically made from wrought aluminum alloys, with common grades including 5052, 5154, and 5154A:

• 5052 Aluminum Alloy:
  The most widely used material for medium- and high-voltage cables. As an Al-Mg alloy, it is non-heat-treatable, offering medium strength, excellent fatigue resistance, good plasticity, and strong corrosion resistance. It also has excellent weldability and is ideal for interlocked armoring structures formed through cold bending.

• 5154 and Modified Alloys:
  Higher magnesium content improves resistance to seawater corrosion, making them suitable for marine cables, ships, and offshore platforms.

• 5154A Aluminum Alloy:
  An upgraded version of 5154, with Mg content increased to 3.1–3.9%, providing higher tensile and yield strength. Suitable for heavy-duty cable armoring requiring superior mechanical protection.

Specifications of Cable Armoring Aluminum Strip

Chemical Composition

Product Advantages

1. Lightweight Efficiency: Aluminum density is only one-third of steel, significantly reducing cable weight, transportation cost, and installation difficulty.

2. Non-Magnetic (No Eddy Current Loss): Unlike steel, aluminum eliminates eddy current losses in AC systems, improving current-carrying capacity and extending cable life.

3. Excellent Corrosion Resistance: A natural oxide film provides strong resistance to moisture, chemicals, and salt spray—ideal for coastal and marine environments.

4. Superior Flexibility: Easier bending enhances cable flexibility, enabling installation in confined or complex environments.

5. Environmentally Friendly: Fully recyclable, free of lead and cadmium, compliant with RoHS and eco-friendly cable standards.

Production Process

1. Aluminum ingot melting and casting

2. Hot rolling to form base coils

3. Cold rolling for precise thickness and surface quality

4. Annealing to improve ductility and mechanical properties

5. Precision slitting (burr ≤0.02 mm, smooth edges)

6. Full inspection (mechanical properties, dimensions, surface quality) in compliance with GB/T 3198 and IEC 60502

Applications

Power Cables

Used as the outer armoring layer for medium- and high-voltage cables, providing mechanical protection and moisture resistance.

Communication Cables

Applied as shielding layers in optical fiber and communication cables to enhance signal stability.

Submarine Cables

Widely used due to excellent corrosion resistance in marine environments.

Control Cables

Provides outer protection for industrial and automation system cables.

Comparison of Armoring Materials

Aluminum Strip Manufacturer

HAOMEI Aluminum can produce aluminum strips in grades 1050, 1060, 1070, and 3003. Equipped with multiple slitting lines, the company can customize strip width, thickness, and length. Protective film can be applied during slitting to prevent surface damage. Slitting precision can be controlled within 0.05 mm, with customizable inner and outer diameters.

Quality Requirements

Neat Edges: High slitting precision, burr-free edges to prevent damage to cable inner sheath

Joint Control: Strict limitation on joints per coil; large coils without joints available

Flatness: No waves or edge buckling, ensuring tight wrapping

Surface Quality: No cracks, corrosion, pinholes, severe creases, or oxidation

Packaging Standards

Wooden pallets or wooden cases for export

Uniform coil length with clear labeling

Pallets: 1.1m × 1.1m × 0.8m, standard export packaging (non-fumigated)

Loading: 4 pallets per 20' container, 8 pallets per 40' container (or as required)

Wooden cases: fumigated, ensuring maximum protection during transportation

HAOMEI Aluminum supplies cable armoring aluminum strips with thickness ranging from 0.1–4.0 mm. Products can be customized according to required width, thickness, and length, with bulk stock available for prompt delivery. Orders are welcome.