ACS Alumoweld Aluminium Clad Steel Wire IEC 61232 Standard

ACS (Aluminum Clad Steel Wire), also known as Alumoweld wire, is a bimetallic conductor that combines the high tensile strength of steel with the superior conductivity and corrosion resistance of aluminum. Manufactured in accordance with IEC 61232 international standard, ACS wire is widely used in overhead transmission systems, especially in environments where durability and corrosion resistance are critical.

  • Acs Alumoweld Aluminium Clad Steel Wire Iec 61232 Standard

ACS Alumoweld Aluminium Clad Steel Wire IEC 61232 Standard


ACS Alumoweld Aluminium Clad Steel Wire

  • Shape of conductor circular and sectional
  • Conductor Material Aluminum Clad Steel
  • Insulation N/A
  • Standard IEC 61232


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ACS (Aluminum Clad Steel Wire), also known as Alumoweld wire, is a bimetallic conductor that combines the high tensile strength of steel with the superior conductivity and corrosion resistance of aluminum. Manufactured in accordance with IEC 61232 international standard, ACS wire is widely used in overhead transmission systems, especially in environments where durability and corrosion resistance are critical.


Applications

ACS wire is suitable for a broad range of overhead line and utility applications, including:

  • Core wire for ACSR/AW (Aluminum Conductor Steel Reinforced with Aluminum Clad Steel Core)

  • Overhead ground wire (OHGW)

  • Extra high voltage overhead conductors

  • OPGW (Optical Ground Wire)

  • Messenger wire and guy wire

  • Self-damping conductor lines

  • Fencing, grounding systems, and even barbed wire

  • Ideal for coastal, island, humid, salt-fog, and industrially polluted regions


Standards

Manufactured to meet or exceed the following standards:

  • IEC 61232 – International standard for aluminum-clad steel wires for overhead lines

  • ASTM B416 / B415 / B502

  • DIN 48201

  • AS 1222.2

  • Other regional or customer-specific standards on request


Features

  • Corrosion Resistance: Aluminum cladding offers excellent resistance to atmospheric and chemical corrosion, far superior to galvanized steel.

  • High Strength: The steel core provides superior tensile strength, suitable for long spans and high tension installations.

  • Thermal Stability: Maintains structural integrity at elevated operating temperatures.

  • Excellent Bonding: Metallurgically bonded aluminum layer will not flake or separate, even under mechanical stress or thermal cycling.

  • Lightweight with High Conductivity: Offers an excellent balance between electrical performance and mechanical durability.


Construction

  • Core: High-tensile galvanized steel

  • Cladding: Aluminum layer bonded to the steel core through a metallurgical process

  • Aluminum Content: Typically ~25% of total cross-sectional area (other ratios available on request)

  • Finish: Smooth surface, bright finish, optional lubrication or anti-corrosive treatment available

ACS Conductor IEC 61232 Standard

Class

20SA

27SA

30SA

40SA

Type

A

B

Tolerance on diameter

Ø ≥ 2,67 mm

± 1,5%

± 1,5%

± 1,5%

± 1,5%

± 1,5%

Ø < 2,67 mm

± 0,04 mm

± 0,04 mm

± 0,04 mm

± 0,04 mm

± 0,04 mm

Minimum thickness of aluminium clad (% of radius)

8% if Ø < 1,80 mm

14%

15%

25%

10% if Ø ≥ 1,80 mm

Nominal density at 20°C (g/cm³)

6,59

6,53

5,91

5,61

4,64

Resistivity at 20°C max. (nΩ x m)

84,80

84,80

63,86

57,47

43,10

Conductivity (IACS)

20,3%

20,3%

27%

30%

40%

Final modulus of elasticity (GPa)

162

155

140

132

109

Coefficient of linear expansion (K-1)

13,0 x 10-6

12,6 x 10-6

13,4 x 10-6

13,8 x 10-6

15,5 x 10-6

Constant-mass temperature coefficient of resistance (K-1)

0,0036

0,0036

0,0036

0,0038

0,0040

MECHANICAL PROPERTIES

class

type

nominal diameter (mm)

min. tensile strength (N/mm²)

min. stress at 1% extension

elongation

torsion test (min. twists)

20SA

A

1,24

3,25

1340

1200

1,5%

20

3,26

3,45

1310

1180

3,46

3,65

1270

1140

3,66

3,95

1250

1100

3,96

4,10

1210

1100

4,11

4,40

1180

1070

4,41

4,60

1140

1030

4,61

4,75

1100

1000

4,76

5,50

1070

1000

B

1,24

5,50

1320

1100

27SA

2,50

5,00

1080

800

30SA

2,50

5,00

880

650

40SA

2,50

5,00

680

500

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