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This specification covers five grades of aluminum-coated, steel wire strand composed of a number of round, steel wires, with aluminum coatings, for use as guys, messengers, span wires, and for similar purposed. The five grades are as follows: (1) utilities; (2) common; (3) Siemens-Martin; (4) high-strength; and (5)extra high-strength. The base metal shall be steel made by any commercially steel making process, The ingot or pig aluminum used for coating shall conform to the required impurity limits of copper and iron. All wires shall be stranded with uniform tension. Physical tests shall be performed wherein the steel wire strands shall conform to the required values of breaking strength. The steel specimens shall also conform to the required values of elongation, diameter and weight of coating.

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1.1 This specification covers five grades of aluminum-coated, steel wire strand, composed of a number of round, steel wires, with aluminum coatings, for use as guys, messengers, span wires, and for similar purposes.

1.2 The five grades covered are as follows:

1.2.1 Utilities,

1.2.2 Common,

1.2.3 Siemens-Martin,

1.2.4 High-Strength, and

1.2.5 Extra High-Strength.

1.3 Minimum breaking strengths of strand for each grade are specified in Table 1.

TABLE 1 Physical Properties of Aluminum-Coated Steel Wire Strand

Nominal
Diameter
of Strand,
in. (mm)

Number
of Wires
in
Strand

Nominal
Diameter
of Coated
Wires in
Strand, in.
(mm)

Approximate
Weight of
Strand,
lb/1000 ft
(kg/m)

Minimum Breaking Strength of Strand, lbf (kN)

Utilities Grade^A

Common
Grade

Siemens-
Martin
Grade

High-
Strength
Grade

Extra-High-
Strength
Grade

³/₁₆ 

(4.76)

7

0.062 (1.57)

 73 (0.108)

  . . .

. . .

 1 150

(5.1)

  1 900

(8.5)

  2 850

(12.7)

 . . .

. . .

³/₁₆ 

(4.76)

7

0.065 (1.65)

 80 (0.118)

  2 400

(10.7)  (1)^B

 . . .

. . .

  . . .

. . .

  . . .

. . .

 . . .

. . .

¹/₄ 

(6.35)

3

0.120 (3.05)

117 (0.173)

  3 150

(14.0)  (2)

 . . .

. . .

  . . .

. . .

  . . .

. . .

 . . .

. . .

¹/₄ 

(6.35)

3

0.120 (3.05)

117 (0.173)

  4 500

(20.0)  (3)

 . . .

. . .

  . . .

. . .

  . . .

. . .

 . . .

. . .

¹/₄ 

(6.35)

7

0.080 (2.03)

121 (0.179)

  . . .

. . .

 1 900

(8.5)

  3 150

(14.0)

  4 750

(21.1)

 6 650

(29.6)

⁹/₃₂ 

(7.14)

7

0.093 (2.36)

164 (0.243)

  4 600

(20.5)  (1)

 . . .

. . .

  . . .

. . .

  . . .

. . .

 . . .

. . .

⁵/₁₆ 

(7.94)

3

0.145 (3.68)

171 (0.253)

  6 500

(28.9)  (3)

 . . .

. . .

  . . .

. . .

  . . .

. . .

 . . .

. . .

⁵/₁₆ 

(7.94)

7

0.104 (2.64)

205 (0.303)

  . . .

. . .

 3 200

(14.2)

  5 350

(23.8)

  8 000

(35.6)

 11 200

(49.8)

⁵/₁₆ 

(7.94)

7

0.109 (2.77)

225 (0.333)

  6 000

(26.7)  (1)

 . . .

. . .

  . . .

. . .

  . . .

. . .

 . . .

. . .

³/₈ 

(9.52)

3

0.165 (4.19)

220 (0.326)

  8 500

(37.8)  (3)

 . . .

. . .

  . . .

. . .

  . . .

. . .

 . . .

. . .

³/₈ 

(9.52)

7

0.120 (3.05)

273 (0.404)

 11 500

(51.2)  (4)

 4 250

(18.9)

  6 950

(30.9)

 10 800

(48.0)

 15 400

(68.5)

⁷/₁₆ 

(11.11)

7

0.145 (3.68)

399 (0.591)

 18 000

(80.1)  (4)

 5 700

(25.4)

  9 350

(41.6)

 14 500

(64.5)

 20 800

(92.5)

¹/₂ 

(12.7)

7

0.165 (4.19)

517 (0.765)

 25 000

(111.2) (4)

 7 400

(32.9)

 12 100

(53.8)

 18 800

(83.6)

 26 900

(119.7)

^A The utilities grade is used principally by communication and power and light industries.^B The last numbers in parentheses refer to elongation requirements specified in Section 9.

1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.