Aluminum Clad Steel (ACS) Wire

FISSOT® ACS Wire (Aluminum Clad Steel Wire) is a high-performance bimetallic conductor that permanently bonds a uniform layer of high-purity aluminum around a high-strength steel core. Utilizing advanced metallurgical cladding technology from GENERAL CLAD®, our ACS wire perfectly balances the excellent electrical conductivity and corrosion resistance of aluminum with the rugged mechanical tension of steel. It is the premier choice for OPGW (Optical Ground Wires), overhead transmission line cores (ACSR/AW), and railway catenary systems.

🌟 Key Benefits

  • 🔗 Zero Galvanic Corrosion: Unlike traditional galvanized steel wire, the continuous metallurgical aluminum cladding eliminates the internal electrochemical interface layer, completely preventing core corrosion in coastal, industrial, and high-humidity environments.

  • 💪 High Strength-to-Weight Ratio: Inherits the structural integrity of a high-carbon steel core while the outer aluminum layer significantly minimizes dead weight, reducing sag in large-span overhead lines.

  • ⚡ Superior Fault Capacity: Provides excellent electrical conductivity (ranging from 14% to 40% IACS), acting as a highly efficient path for fault and lightning currents to safeguard power grid stability.

  • 🌡️ Excellent Thermal Longevity: Engineered to operate continuously at high temperatures up to 150°C without bond degradation or mechanical failure.

🚀 Top Applications

  • 🛰️ OPGW (Optical Ground Wire): Used as the core structural tension wires and shielding layers in OPGW cables, providing mechanical reinforcement and excellent lightning discharge diversion.

  • ⚡ ACSR/AW Conductor Cores: Replaces standard galvanized steel cores in Aluminum Conductors Steel Reinforced (ACSR) to lower line resistance and decrease power grid transmission loss.

  • 🚊 High-Speed Rail Catenary: Serves as catenary messenger wires and auxiliary earth wires under extreme mechanical tension and high-vibration railway environments.

Contact Us for Pricing

Interested in this product? Contact us now for detailed pricing and product information.

Grade Diameter Range (mm) Min. Tensile Strength (MPa) Min. Stress at 1% Elongation (MPa) Min. Elongation at Fraction (%) Min. Elongation after Fraction (%) Max. Resistance at 20°C (nΩ·m)
A2.25 < d ≤ 3.00159014101.51.0123.15
3.00 < d ≤ 3.5015501380
3.50 < d ≤ 4.7515201340
4.75 < d ≤ 5.5015001270
B1.75 < d ≤ 2.2518251550
2.25 < d ≤ 3.0017901500
3.00 < d ≤ 3.5017601470
3.50 < d ≤ 4.7517251430
C1.24 < d ≤ 2.2519651580
2.25 < d ≤ 3.0019001550
3.00 < d ≤ 3.5018601515
3.50 < d ≤ 4.7518251480
D2.25 < d ≤ 3.00159014102.52.0
3.00 < d ≤ 3.5015501380
3.50 < d ≤ 4.7515201340
4.75 < d ≤ 5.5015001270
Grade Diameter Range (mm) Min. Tensile Strength (MPa) Min. Stress at 1% Elongation (MPa) Min. Elongation at Fraction (%) Min. Elongation after Fraction (%) Max. Resistance at 20°C (nΩ·m)
A1.24 < d ≤ 3.25134012001.51.084.80
3.25 < d ≤ 3.4513101180
3.45 < d ≤ 3.6512701140
3.65 < d ≤ 3.9512501100
3.95 < d ≤ 4.1012101100
4.10 < d ≤ 4.4011801070
4.40 < d ≤ 4.6011401030
4.60 < d ≤ 4.7511001000
4.75 < d ≤ 5.5010701000
B1.28 < d ≤ 2.2816201390
2.28 < d ≤ 3.0415801360
3.04 < d ≤ 3.5515451330
3.55 < d ≤ 4.8215151300
C1.24 < d ≤ 3.25134012002.52.0
3.25 < d ≤ 3.4513101180
3.45 < d ≤ 3.6512701140
3.65 < d ≤ 3.9512501100
3.95 < d ≤ 4.1012101100
4.10 < d ≤ 4.4011801070
4.40 < d ≤ 4.6011401030
4.60 < d ≤ 4.7511001000
4.75 < d ≤ 5.5010701000
Grade Diameter Range (mm) Min. Tensile Strength (MPa) Min. Stress at 1% Elongation (MPa) Min. Elongation at Fraction (%) Min. Elongation after Fraction (%) Max. Resistance at 20°C (nΩ·m)
Standard 2.50 < d ≤ 5.00 1080 800 1.5 1.0 63.86
Grade Diameter Range (mm) Min. Tensile Strength (MPa) Min. Stress at 1% Elongation (MPa) Min. Elongation at Fraction (%) Min. Elongation after Fraction (%) Max. Resistance at 20°C (nΩ·m)
Standard 2.50 < d ≤ 5.00 680 500 1.5 1.0 43.10

FAQs About Aluminum-Clad Steel Wire

What are the primary structural advantages of Aluminum Clad Steel (ACS) wire over galvanized steel wire in ACSR cores?
The main advantages include exceptional corrosion resistance and a higher strength-to-weight ratio. Galvanized wire relies on a sacrificial zinc layer that degrades over time, creating a high risk of galvanic corrosion at the copper/aluminum interface. FISSOT’s ACS wire creates an impervious metallurgical barrier of aluminum, ensuring the core lasts as long as the outer conductor strands, while reducing overall cable weight to prevent transmission line sag.
How does ACS wire perform during electrical short-circuit and lightning strike events?
ACS wire features significantly higher electrical conductivity than galvanized steel wire (typically 20.3% to 40% IACS vs approximately 8% IACS). During short circuits or lightning discharges, the thick outer aluminum layer provides a low-resistance path that safely routes fault current away from crucial optical cores (in OPGW) or conductors, reducing structural overheating and electrical thermal failure.
Can FISSOT® customize specific conductivity and mechanical combinations for specialized grid spans?
Yes. As an official standard drafting unit, FISSOT® can customize the thickness of the cladded aluminum layer and steel carbon concentrations. This allows us to manufacture bespoke combinations like Class 30I or Class 40I paired with standard, high-strength, or extra-high-strength steel cores tailored to your exact span lengths and atmospheric cross-winds.
Which international standards does FISSOT® ACS wire comply with?
Our entire production line strictly complies with and exceeds international criteria including ASTM B415 (Standard Specification for Hard-Drawn Aluminum-Clad Steel Wire), ASTM B416 (Concentric-Lay-Stranded Aluminum-Clad Steel Conductors), and IEC 61232. Additionally, our engineering workflows integrate benchmarks established by ISO 14811:2025.
How does GENERAL CLAD® technology guarantee that the aluminum and steel layers do not separate during installation tension?
We leverage proprietary manufacturing techniques that enforce solid-phase bonding under intensive high pressure. This process fuses the crystal lattices of the aluminum layer and steel core together, forming a unified atomic bond. The wire can undergo continuous drawing, twisting, and field tensioning without any risk of layer peeling or cracking.
What is the typical operating temperature lifecycle for ACS wire inside power grids?
Our premium hard-drawn ACS wires are rated for continuous operational cycles up to 150°C and short-term thermal emergency spikes up to 300°C without sustaining structural annealing or losing tensile performance. This capability ensures complete stability within high-capacity transmission corridors.

Need a Direct Manufacturing Partner?

Explore our 5,000㎡ ISO-certified facility, proprietary Cold Cladding technology, and volume production capabilities.

View Factory Capabilities
×

Select Language

Quick Inquiry

Inquiry for: