ASTM B524 - B 524M - 23

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Designation: B524/B524M −23
Standard Speciﬁcation for
Concentric-Lay-Stranded Aluminum Conductors, Aluminum-
Alloy Reinforced (ACAR, 1350/6201)
1
This standard is issued under the ﬁxed designation B524/B524M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This speciﬁcation covers concentric-lay-stranded con-
ductors made from round aluminum 1350-H19 (extra hard)
wires and round aluminum-alloy 6201-T81 (hard: solution heat
treated, cold worked, and then artiﬁcially aged) core wires for
use as overhead electrical conductors (Explanatory Note 1).
NOTE 1—The aluminum, alloy, and temper designations conform to
ANSI H35.1/ANSI H35.1[M]. Aluminum 1350 and Alloy 6201 corre-
spond to uniﬁed numbering system A91350 and A96201, respectively, in
accordance with Practice E527.
1.2 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.
1.2.1 For density, resistivity and temperature, the values
stated in SI units are to be regarded as standard.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 The following documents of the issue in effect on date
of material purchase form a part of this speciﬁcation to the
extent referenced herein:
2.2 ASTM Standards:
2
B193 Test Method for Resistivity of Electrical Conductor
Materials
B230/B230M Speciﬁcation for Aluminum 1350–H19 Wire
for Electrical Purposes
B263/B263M Test Method for Determination of Cross-
Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electri-
cal Conductors
B398/B398M Speciﬁcation for Aluminum-Alloy 6201-T81
and 6201-T83 Wire for Electrical Purposes
B682 Speciﬁcation for Standard Metric Sizes of Electrical
Conductors
E29 Practice for Using Signiﬁcant Digits in Test Data to
Determine Conformance with Speciﬁcations
E527 Practice for Numbering Metals and Alloys in the
Uniﬁed Numbering System (UNS)
2.3 ANSI Standard:
ANSI H35.1 American National Standard for Alloy and
Temper Designation Systems for Aluminum
3
ANSI H35.1[M] American National Standard for Alloy and
Temper Designation Systems for Aluminum
3
2.4 NIST Document:
NBS Handbook 100 —Copper Wire Tables
4
3. Ordering Information
3.1 Orders for material under this speciﬁcation shall include
the following information:
3.1.1 Quantity of each size and stranding;
3.1.2 Conductor size (see 7.1);
3.1.3 Total number of wires, aluminum 1350 and aluminum
alloy 6201 (Table 1 or Table 2);
3.1.4 Direction of lay of outer layer of wires if other than
right-hand (see 6.3);
3.1.5 Special tension test, if required (see 8.2);
1
This speciﬁcation is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on
Conductors of Light Metals.
Current edition approved April 1, 2023. Published April 2023. Originally
approved in 1970. Last previous edition approved in 2018 as B0524/B524M – 18.
DOI: 10.1520/B0524_B0524M-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org.
4
Available from National Institute of Standards and Technology (NIST), 100
Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http://www.nist.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
1

TABLE 1 Construction Requirements of Concentric-Lay-Stranded Aluminum Conductors, Aluminum Alloy Reinforced

Conductor Size

Required Construction Recommended Package Sizes

Number

of Wires

Diameter

of Wires

Nominal

Outside

Diameter

Reel

Designation

Approximate

Length of Each

Piece

Approximate

Mass of Each

Length

cmil AWG mm

in. mm in. mm ft m lb kg

3 000 000 1520 91 0.1816 4.613 1.998 50.74 RMT 90.45 3 200 975 9 100 4130

2 750 000 1393 91 0.1738 4.415 1.912 48.56 RMT 90.45 3 490 1065 9 100 4130

2 500 000 1267 91 0.1657 4.209 1.823 46.30 RMT 90.45 3 840 1170 9 100 4130

2 493 000 1263 91 0.1655 4.204 1.8207 46.25 RMT 96.60 6 500 1981 15 400 6970

2 338 000 1185 61 0.1958 4.973 1.7620 44.75 RMT 96.60 7 500 2286 16 700 7540

2 250 000 1140 91 0.1572 3.993 1.729 43.92 RMT 90.45 4 270 1300 9 100 4130

2 000 000 1013 91 0.1482 3.764 1.630 41.40 RMT 90.45 4 850 1480 9 100 4130

2 000 000 1013 61 0.1811 4.600 1.630 41.40 RMT 90.45 5 200 1585 9 760 4425

1 933 000 979 61 0.1780 4.522 1.6021 40.69 RMT 96.60 9 200 2804 16 700 7570

1 900 000 963 61 0.1765 4.483 1.588 40.35 RMT 90.45 5 470 1665 9 760 4425

1 800 000 912 61 0.1718 4.364 1.546 39.28 RMT 90.45 5 780 1760 9 760 4425

1 798 000 911 61 0.1717 4.361 1.5452 39.25 RMT 96.60 9 200 2804 15 600 7040

1 750 000 887 61 0.1694 4.303 1.525 38.73 RMT 90.45 5 940 1810 9 760 4425

1 703 000 863 61 0.1671 4.244 1.8380 46.68 RMT 96.60 9 000 2743 14 400 6530

1 700 000 861 61 0.1669 4.239 1.502 38.15 RMT 90.45 6 120 1865 9 760 4425

1 600 000 811 61 0.1620 4.115 1.458 37.04 RMT 90.45 6 500 1980 9 760 4425

1 534 400 777 61 0.1586 4.028 1.4274 36.26 RMT 96.60 10 000 3048 14 400 6530

1 500 000 760 61 0.1568 3.983 1.411 35.85 RMT 90.45 6 930 2110 9 760 4425

1 400 000 709 61 0.1515 3.848 1.364 34.63 RMT 90.45 7 430 2265 9 760 4425

1 361 500 690 61 0.1494 3.795 1.3446 34.15 RMT 96.60 11 250 3429 14 400 6530

1 300 000 659 61 0.1460 3.708 1.314 33.37 RMT 90.45 8 000 2440 9 760 4425

1 300 000 659 37 0.1874 4.760 1.312 33.32 RMT 84.45 6 065 1850 7 400 3355

1 277 000 647 61 0.1447 3.675 1.3022 33.08 RMT 96.60 12 000 3658 14 400 6520

1 250 000 633 61 0.1431 3.635 1.288 32.72 RMT 90.45 8 320 2535 9 760 4425

1 250 000 633 37 0.1838 4.669 1.287 32.70 RMT 84.45 6 310 1920 7 400 3355

1 200 000 608 61 0.1403 3.564 1.263 32.08 RMT 90.45 8 660 2640 9 760 4425

1 200 000 608 37 0.1801 4.575 1.261 32.02 RMT 84.45 6 565 2000 7 400 3355

1 198 000 607 37 0.1799 4.570 1.2596 31.99 RMT 96.60 12 850 3917 14 500 6550

1 172 000 594 37 0.1780 4.521 1.2458 31.64 RMT 96.60 14 400 4389 15 900 7180

1 109 000 562 37 0.1731 4.397 1.2119 30.78 RMT 96.60 13 850 4221 14 500 6540

1 100 000 557 61 0.1343 3.411 1.209 30.70 RMT 90.45 9 450 2880 9 760 4425

1 100 000 557 37 0.1724 4.379 1.207 30.65 RMT 84.45 7 160 2180 7 400 3355

1 080 600 548 37 0.1709 4.341 1.1963 30.39 RMT 96.60 15 600 4755 15 800 7170

1 024 500 519 37 0.1664 4.227 1.1648 29.59 RMT 96.60 15 000 4572 14 500 6540

1 000 000 507 61 0.1280 3.251 1.152 29.26 RMT 90.45 10 400 3170 9 760 4425

1 000 000 507 37 0.1644 4.176 1.151 29.23 RMT 84.45 7 880 2400 7 400 3355

950 000 481 37 0.1602 4.069 1.121 28.48 RMT 84.45 8 300 2530 7 400 3355

927 200 470 37 0.1583 4.021 1.1081 28.15 RMT 90.45 10 400 3170 9 050 4110

900 000 456 37 0.1560 3.962 1.092 27.73 RMT 84.45 8 760 2670 7 400 3355

853 700 433 37 0.1519 3.858 1.0633 27.01 RMT 96.60 18 000 5486 14 500 6540

850 000 431 37 0.1516 3.851 1.061 26.96 RMT 84.45 9 270 2825 7 400 3355

800 000 405 37 0.1470 3.734 1.029 26.14 RMT 84.45 9 850 3000 7 400 3355

750 000 380 37 0.1424 3.617 0.997 25.32 RMT 84.45 10 510 3200 7 400 3355

739 800 375 37 0.1414 3.592 0.9898 25.14 RMT 90.45 13 010 3965 9 020 4090

700 000 355 37 0.1375 3.493 0.962 24.45 RMT 84.45 11 260 3430 7 400 3355

653 100 331 19 0.1854 4.709 0.9270 23.55 RMT 84.45 9 910 3021 6 070 2760

650 000 329 37 0.1325 3.366 0.928 23.56 RMT 84.45 12 130 3695 7 400 3355

649 500 329 37 0.1325 3.365 0.9274 23.56 NR 66.28 6 890 2100 4 200 1910

600 000 304 37 0.1273 3.233 0.891 22.63 RMT 84.45 13 140 4005 7 400 3355

600 000 304 19 0.1777 4.513 0.888 22.56 RM 66.32 6 750 2060 3 800 1725

NR 66.28

587 200 298 19 0.1758 4.465 0.8790 22.33 NR 66.28 8 030 2448 4 430 2010

550 000 279 37 0.1219 3.096 0.853 21.67 RMT 84.45 14 330 4365 7 400 3355

550 000 279 19 0.1701 4.321 0.850 21.60 RM 66.32 7 360 2245 3 800 1725

NR 66.28

503 600 255 19 0.1628 4.135 0.8140 20.68 NR 66.28 8 030 2448 3 800 1730

500 000 253 37 0.1162 2.951 0.813 20.66 RMT 84.45 15 765 4805 7 400 3355

500 000 253 19 0.1622 4.120 0.811 20.60 RM 66.32 8 100 2470 3 800 1725

NR 66.28

450 000 228 19 0.1539 3.909 0.770 19.54 RM 66.32 9 000 2745 3 800 1725

NR 66.28

400 000 203 19 0.1451 3.685 0.726 18.42 RM 66.32 10 120 3085 3 800 1725

NR 66.28

350 000 177 19 0.1357 3.447 0.678 17.24 RM 66.32 11 560 3530 3 800 1725

NR 66.28

300 000 152 19 0.1257 3.193 0.628 15.96 RM 66.32 13 490 4115 3 800 1725

NR 66.28

250 000 127 19 0.1147 2.913 0.574 14.56 RM 66.32 16 190 4940 3 800 1725

NR 66.28

B524/B524M − 23

3.1.6 Place of inspection (see 14.2);
3.1.7 Package size and type (see 16.1);
3.1.8 Heavy wood lagging, if required (Section 16); and
3.1.9 Special package marking, if required (Section 15).
4. Requirement for Wires
4.1 Before stranding, the 1350-H19 wire used shall meet the
requirements of Speciﬁcation B230/B230M.
4.2 Before stranding, the 6201-T81 wire used shall meet the
requirements of Speciﬁcation B398/B398M.
5. Joints
5.1 In conductors composed of seven wires, only cold-
pressure welds and electric butt, cold-upset welds may be made
in the six outer ﬁnished wires. No welds are permitted in the
center core wire. In other conductors, cold-pressure welds,
electric-butt, cold-upset welds, or electric-butt welds may be
made in the ﬁnished wires. Such joints in the same wire or any
other wire in the conductor shall be not closer than prescribed
in Table 3. Following welding, electric-butt welds in 6201
wires shall be annealed for a distance of at least 6 in. (150 mm)
on each side of the weld (Explanatory Note 2).
6. Lay
6.1 The length of lay of a layer of wires shall not be less
than 10 nor more than 16 times the outside diameter of that
layer.
6.2 In a conductor having multiple layers of aluminum
wires, the length of lay of any aluminum layer shall not be less
than the length of lay of the aluminum layer immediately
beneath it.
6.3 The direction of lay of the outer layer shall be right-hand
unless speciﬁed otherwise by the purchaser. The direction of
lay shall be reversed in successive layers.
7. Construction
7.1 The number and diameter of wires and the areas of cross
section of conductors shall conform to the requirements
prescribed in Table 1 or Table 2.
7.2 Recommended standard strandings are as shown in
Table 4.
7.3 The nominal wire diameter shall be as speciﬁed in Table
1and this diameter shall be referred to as the “mean diameter”.
The nominal outside diameter of the conductor shall be
calculated by summing the mean diameter of the core wire and
twice the mean diameter of each layer. The minimum and
maximum outside diameter shall be based on calculations
made using the method described above and the mean diameter
tolerances as speciﬁed by Speciﬁcation B230/B230M and
Speciﬁcation B398/B398M for the corresponding mean diam-
eter of each layer.
8. Strength of Conductor
8.1 The rated strength of completed conductors shall be
taken as the aggregate strength of the aluminum 1350 and the
aluminum-alloy 6201 components, calculated as follows. The
strength contribution of the aluminum 1350 wires shall be
taken as the percentage indicated in Table 6, of the sum of the
strengths of the aluminum 1350 wires, calculated from their
speciﬁed nominal wire diameter and the appropriate speciﬁed
minimum average tensile strength given in Speciﬁcation B230/
B230M. The strength contribution of the aluminum-alloy 6201
wires shall be taken as that percentage, according to the
number of layers of aluminum-alloy 6201 wires, indicated in
Table 6, of the sum of the strengths of the aluminum-alloy
6201 wires, calculated from their speciﬁed nominal wire
diameter and the minimum stress at 1 % extension. This shall
be considered to be 95 % of the minimum average tensile
strength speciﬁed for the wire diameter in Speciﬁcation B398/
B398M.
TABLE 1 Continued
Conductor Size
Required Construction Recommended Package Sizes
A
Number
of Wires
B
Diameter
of Wires
Nominal
Outside
Diameter
Reel
Designation
Approximate
Length of Each
Piece
Approximate
Mass of Each
Length
C
cmil AWG mm
2
in. mm in. mm ft m lb kg
246 900 125 7 0.1878 4.770 0.563 14.31 NR 36.22 3 020 920 700 318
211 600 4/0 107 7 0.1739 4.417 0.522 13.25 NR 36.22 3 525 1075 700 318
195 700 99.1 7 0.1672 4.247 0.502 12.74 NR 36.22 3 810 1165 700 318
167 800 3/0 85.0 7 0.1548 3.932 0.464 11.80 NR 36.22 4 445 1355 700 318
155 400 78.7 7 0.1490 3.785 0.447 11.35 NR 36.22 4 800 1465 700 318
133 100 2/0 67.4 7 0.1379 3.503 0.414 10.52 NR 36.22 5 605 1710 700 318
123 300 62.5 7 0.1327 3.371 0.398 10.11 NR 36.22 6 050 1845 700 318
105 600 1/0 53.5 7 0.1228 3.119 0.368 9.35 NR 36.22 7 065 2155 700 318
77 470 39.3 7 0.1052 2.672 0.316 8.03 NR 36.22 9 630 2940 700 318
66 360 2 33.6 7 0.0974 2.474 0.292 7.42 NR 36.22 11 235 3430 700 318
48 690 24.7 7 0.0834 2.118 0.250 6.35 NR 36.22 15 315 4675 700 318
41 740 4 21.2 7 0.0772 1.961 0.232 5.89 NR 36.22 17 855 5455 700 318
30 580 15.5 7 0.0661 1.679 0.198 5.03 NR 36.22 24 390 7445 700 318
A
See Table 4 for dimensions of standard reels.
B
Recommended standard stranding combinations are shown in Table 5.
C
See Table 7 for mass per unit length for each stranding.
B524/B524M − 23
3

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摘要：

ASTM B524 - B524M - 23 是2023年发布的铝合金无缝管标准规范，涵盖6061和6063合金等常用牌号的化学成分、力学性能、尺寸公差及检测方法，适用于输油、化工及建筑结构等领域。该标准由美国材料与试验协会制定，旨在确保管道产品在耐腐蚀性、焊接性与强度方面满足工业使用需求。用户可通过该文档了解铝合金管材的生产验收依据及国际认证要求。

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