ACS Aluminum Clad Steel Stranded 4 AWG 21.15mm2 ASTM B415
ACS (Aluminum clad steel stranded) is a cable structure formed by coating a high-strength steel core with an aluminum layer and then stranding the components together. This design integrates the mechanical strength of steel with aluminum’s corrosion resistance and electrical conductivity. Due to its durability and performance in harsh environments, it is extensively used in overhead transmission lines, ground wires, and guy wires. Compared to traditional galvanized steel ground wires, it provides enhanced corrosion resistance; reduced weight for equivalent specifications; permanent metallurgical bonding between aluminum and steel ensuring consistent lifelong performance; and higher electrical conductivity than conventional galvanized steel solutions.
Application
ACS (Aluminum clad steel stranded) has many advantages, it widely used in long-span transmission line, coastal areas and island as well as other hot and humid regions, salt fog regions and heavily polluted regions where the high corrosion resistance strand is needed.
The aluminum-clad steel wire strand combines the high tensile strength of its steel core with the corrosion resistance and conductivity of the aluminum coating. The steel core ensures structural integrity for overhead transmission lines and cables, while the aluminum layer prevents rust, extends service life, and minimizes maintenance. Additionally, the aluminum coating enables efficient power transmission due to its excellent conductivity. This material is widely used in applications such as overhead ground wires, jumper wires, and as the core component of ACSR (Aluminum Conductor Steel Reinforced) conductors.
Standard
-ASTM B415 Standard Specification for Hard-Drawn Aluminum-Clad Steel Wire
-ASTM B502 Aluminum-Clad Steel Core Wire for Aluminum Conductors
-ASTM B416 Concentric-Lay-Stranded Aluminum-Clad Steel Conductor
-ASTM B549 Concentric-Lay-Stranded Aluminum Conductors, ACSR/AW
-ASTM B341 Mainly applicable to single aluminum-clad steel core wire, rather than complete aluminum-clad steel stranded wire
-IEC 61232 International Electrotechnical Commission International Standard
-IEC 61089 Round Wire Concentric Lay Overhead Electrical Stranded Conductors
-DIN 48201 Aluminum Clad Steel Stranded wire, German Standard
-EN 61232 Equivalent to IEC 61232, it is a mandatory requirement in the EU market.
-BS EN 50182 Standard European Committee for Standardization
-AS 1222.2 Steel Conductors and stays Bare Overhead Part 2: Aluminum clad (SC/AC), Australia Standard
-GB/T 17937 Equivalent to IEC 61232, it is used for ground wires and OPGW, China Standard
-GB/T 1179 Standardize the wires with aluminum-clad steel cores, China Standard
– JEC 3447 Regulates the specifications of aluminum-clad steel single wires, but does not extend to aluminum-clad steel stranded conductors, Japan Standard
– IS 398(Part 4) Non-independent aluminum-clad steel stranded conductor, specifically ACSR/AW (Aluminum Conductor Aluminum-Clad Steel Reinforced), India Standard
– GOST R 58095 Regulates the use of aluminum-clad steel stranded conductors for overhead lines, Russia Standard
Construction
Eastful’s wire consists of a central steel core with a layer of high-conductivity aluminum extruded over it. The aluminum layer thickness is at least 10% of the wire radius and approximately 25% of the cross-sectional area.
Eastful’s stranded cable consists of three (3) to thirty-seven (37) strands of concentrically stranded wires with a left-hand lay, unless otherwise specified, and each individual strand is of the same diameter.
Technical Parameter
| Size | Strands | Nominal Wire Diameter | Cross Section Area | Ultimate Tensile Strength | Minimum Breaking Strength | Weight | Resistance At 20ºC or 68ºF | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AWG | # | in | mm | in² | mm² | ksi | kg/mm² | lb | kg | lb/1000 ft | kg/km | Ω/1000 ft | Ω/km | ||||
| 4 | 1 | 0.2043 | 5.189 | 0.03278 | 21.15 | 155 | 109.0 | 5081 | 2305 | 93.63 | 139.3 | 1.222 | 4.009 | ||||