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This specification covers aluminium 1350 drawing stock for electrical purposes. The stock shall conform to the chemical composition requirements. The stock shall be uniform in quality and temper and shall be suitable for drawing into wire. The tensile strength tests and requirements for the respective tempers of stock are presented in details. The stock shall be furnished in continuous-length coils without joints, unless otherwise agreed upon between the manufacturer and purchaser. The electrical resistivity tests shall be made on full-section samples of the stock.

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1.1 This specification covers aluminum 1350 drawing stock 0.375 in. (9.52 mm) to 1.000 in. (25.40 mm) in diameter, in the tempers shown in Table 1, for drawing into wire for electrical conductors (Explanatory Note 1 and Note 2).

TABLE 1 Tensile Property Limits^A

Temper

Tensile Strength

ksi

MPa

1350-O

 8.5–14.0

 59–97

1350-H12 and -H22

12.0–17.0

 83–117

1350-H14 and -H24

15.0–20.0^A

103–138

1350-H16 and -H26

17.0–22.0^A

117–152

^A Applicable to stock sizes through 0.500-in. (12.70-mm) diameter. The values to apply for larger sizes in these tempers shall be negotiated at time of inquiry.

1.2 The SI values of density and resistivity are to be regarded as the standard. For all other properties the inch-pound values are to be regarded as standard and the SI units may be approximate.

Note 1—Prior to 1975, aluminum 1350 was designated as EC aluminum.

Note 2—The aluminum and temper designations conform to ANSI H35.1. Aluminum 1350 corresponds to unified numbering system A91350 in accordance with Practice E527.TABLE 2 Chemical Requirements^A

Element

Composition, %

Silicon, max

  0.10

Iron, max

  0.40

Copper, max

  0.05

Manganese, max

  0.01

Chromium, max

  0.01

Zinc, max

  0.05

Boron, max

  0.05

Gallium, max

  0.03

Vanadium plus titanium, total, max

  0.02

Other elements, each, max

  0.03

Other elements, total, max

  0.10

Aluminum, min

 99.50

^A Analysis shall regularly be made only for the elements specified in this table. If, however, the presence of other elements is suspected or indicated in amounts greater than the specified limits, further analysis shall be made to determine that these elements are not present in amounts in excess of the specified limits.TABLE 3 Electrical Resistivity Limits

Temper

Resistivity, Ω·
mm ²/m, max

Equivalent Volume
Conductivity,
% IACS, min

1350-O

0.027899

61.8

1350-H12 and -H22

0.028035

61.5

1350-H14 and -H24

0.028080

61.4

1350-H16 and -H26

0.028126

61.3

TABLE 4 Equivalent Resistivity Values at 20°C^A

Material

Volume Conductivity,
% IACS

Resistivity Constants

Volume

Ω·mm ²/m

Ω·cmil/ft

μΩ·in.

μΩ·cm

Copper

100

0.017241

10.371

0.67879

1.7241

 

 

 

 

 

 

Aluminum

  61.3

0.028126

16.919

1.1073

2.8126

 

  61.4

0.028080

16.891

1.1055

2.8080

 

  61.5

0.028035

16.864

1.1037

2.8035

 

  61.8

0.027899

16.782

1.0984

2.7899

^A The equivalent resistivity values for 100 % IACS conductivity were each computed from the fundamental IEC value (¹/₅₈  Ω·mm²/m) using conversion factors each accurate to at least seven significant figures. Corresponding values for other conductivities (aluminum) were derived from these by multiplying by the reciprocal of the conductivity ratios accurate to at least seven significant figures. TABLE 5 Diameter Tolerances

Specified Diameter, in.
(mm)

Tolerance, in. (mm), Plus or Minus

Deviation of Mean^A
Diameter from
Specified Diameter

Deviation at Any
Point from
Specified Diameter

0.375–0.500 (9.52–12.70)
0.501–1.00 (12.73–25.40)

0.020 (0.51)
0.025 (0.64)

0.030 (0.76)
0.035 (0.89)

^A For this specification, mean diameter is the average of the maximum diameter and the minimum diameter measured in the same transverse plane along the length.