ASTM B711-22

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Designation: B711 − 18 B711 − 22
Standard Specification for
Concentric-Lay-Stranded Aluminum-Alloy Conductors, Steel
Reinforced (AACSR) (6201)
This standard is issued under the fixed designation B711; 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 conductors made from round aluminum-alloy 6201-T81 hard: solution heat
treated, cold worked, and then artificially aged wire and round zinc-coated, Zn-5Al-MM coated, aluminum-coated, or
aluminum-clad steel core wire for use as overhead electric conductors (Explanatory Note 1 and Note 2).
NOTE 1—The alloy and temper designations conform to ANSI H35.1. Aluminum alloy 6201 corresponds to Unified Numbering System alloy A96201 in
accordance with Practice E527.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.4 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.
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:
B263B263/B263M Test Method for Determination of Cross-Sectional Area of Stranded Conductors
B354 Terminology Relating to Uninsulated Metallic Electrical Conductors
B398/B398M Specification for Aluminum-Alloy 6201-T81 and 6201-T83 Wire for Electrical Purposes
B498/B498M Specification for Zinc-Coated (Galvanized) Steel Core Wire for Use in Overhead Electrical Conductors
B500/B500M Specification for Metallic Coated or Aluminum Clad Stranded Steel Core for Use in Overhead Electrical
Conductors
B502B502/B502M Specification for Aluminum-Clad Steel Core Wire for Use in Overhead Electrical Aluminum Conductors
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 March 1, 2018Dec. 1, 2022. Published March 2018January 2023. Originally approved in 1982. Last previous edition approved in 20132018 as
B711 – 13.B711 – 18. DOI: 10.1520/B0711-18.10.1520/B0711-22.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B711 − 22
B606B606/B606M Specification for High-Strength Zinc-Coated (Galvanized) Steel Core Wire for Aluminum and Aluminum-
Alloy Conductors, Steel Reinforced
B802/B802M Specification for Zinc–5 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Aluminum Conductors,
Steel Reinforced (ACSR)
B803B803/B803M Specification for High-Strength Zinc–5 % Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Use in
Overhead Electrical Conductors
B957B957/B957M Specification for Extra-High-Strength and Ultra-High-Strength Zinc-Coated (Galvanized) Steel Core Wire
for Overhead Electrical Conductors
B958B958/B958M Specification for Extra-High-Strength and Ultra-High-Strength Class A Zinc–5% Aluminum-Mischmetal
Alloy-Coated Steel Core Wire for Use in Overhead 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 American National Standards Institute Standard:
H35.1M Alloy and Temper Designation Systems for Aluminum
2.4 Other Standards:
NBS Handbook 100—Copper Wire Tables
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 AACSR—covered by this specification has fiveten types of coated steel and one typetwo types of aluminum-clad steel core
wire which are designated by abbreviations as follows (Explanatory Note 1 and Note 9):
3.1.1.1 AACSR/GA2-AACSR—using Class A zinc-coated steel wire in accordance with Specification B498/B498M.
3.1.1.2 AACSR/GC2-AACSR—using Class C zinc-coated steel wire in accordance with Specification B498/B498M.
3.1.1.3 AACSR/GA3-AACSR—using high-strength Class A zinc-coated steel wire in accordance with Specification B606B606/
B606M.
3.1.1.4 AACSR/GA4-AACSR—using extra-high-strength Class A zinc-coated steel wire in accordance with Specification
B957B957/B957M.
3.1.1.5 AACSR/GA5-AACSR—using ultra-high-strength Class A zinc-coated steel wire in accordance with Specification
B957B957/B957M.
3.1.1.6 AACSR/AW2-AACSR—using aluminum-clad steel wire, normal strength in accordance with Specification B502B502/
B502M.
3.1.1.7 AACSR/AW3-AACSR—using aluminum-clad steel wire, high strength in accordance with Specification B502B502/
B502M.
3.1.1.8 AACSR/MA2—using Zn-5Al-MM coated steel core wire, coating Class A in accordance with Specification B802/
B802M.
3.1.1.9 AACSR/MC2—using Zn-5Al-MM coated steel core wire, coating Class C in accordance with Specification B802/
B802M.
3.1.1.10 AACSR/MA3—using high-strength Zn-5Al-MM coated steel core wire, coating Class A in accordance with
Specification B803B803/B803M.
3.1.1.11 AACSR/MA4—using extra-high-strength Zn-5Al-MM coated steel core wire, coating Class A in accordance with
Specification B958B958/B958M).
3.1.1.12 AACSR/AZ-MA5—AACSR/MA5—using ultra-high-strength Zn-5Al-MM coated steel core wire, coating Class A in
accordance with Specification B958B958/B958M.
4. Ordering Information
4.1 Orders for material under this specification shall include the following information:
4.1.1 Quantity of each size and stranding,
4.1.2 Conductor size, square millimetres (Section 8 and Table 1);
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.
Available from National Institute of Standards and Technology (NIST), 100 Bureau Dr., Stop 3460, Gaithersburg, MD 20899-3460.
B711 − 22
TABLE 1 Construction Requirements of Aluminum-Alloy Conductors, Steel Reinforced, Concentric-Lay-Stranded
2 A
Conductor Area, mm Stranding and Wire Diameter Diameter, mm
B C
Rated Strength Mass
Alloy Steel
Alloy
Steel Total Conductor Steel Core
Nominal
Number mm Number mm kN kg/km
1250 102 1352 84 4.35 19 2.61 47.8 13.0 489 4255
1120 91 1211 84 4.12 19 2.47 45.3 12.4 437 3816
1000 81 1081 84 3.89 19 2.33 42.8 11.6 389 3400
900 73 973 84 3.69 19 2.21 40.6 11.0 353 3060
800 101 901 54 4.34 19 2.60 39.0 13.0 361 3003
710 90 800 54 4.09 19 2.45 36.8 12.2 321 2664
630 80 710 54 3.85 19 2.31 34.6 11.6 285 2365
560 71 631 54 3.63 19 2.18 32.7 10.9 256 2104
500 63 563 54 3.43 19 2.06 30.9 10.3 228 1878
450 59 509 54 3.26 19 1.98 29.5 9.90 208 1706
400 91 491 30 4.12 19 2.47 28.8 12.4 237 1818
400 65 465 26 4.43 7 3.45 28.1 10.4 206 1616
355 81 436 30 3.88 19 2.33 27.2 11.6 210 1614
355 58 413 26 4.17 7 3.24 26.4 9.72 182 1430
315 72 387 30 3.66 19 2.20 25.6 11.0 190 1438
315 52 367 26 3.93 7 3.06 24.9 9.18 162 1272
280 65 345 30 3.45 7 3.45 24.2 10.4 171 1286
280 46 326 26 3.70 7 2.88 23.4 8.64 144 1127
250 58 308 30 3.26 7 3.26 22.8 9.78 152 1149
250 41 291 26 3.50 7 2.72 22.2 8.16 128 1008
224 52 276 30 3.08 7 3.08 21.6 9.24 139 1025
224 36 260 26 3.31 7 2.57 21.0 7.71 115 901
200 47 247 30 2.91 7 2.91 20.4 8.73 124 915
200 32 232 26 3.13 7 2.43 19.8 7.29 105 805
180 42 222 30 2.76 7 2.76 19.3 8.28 112 823
180 29 209 26 2.97 7 2.31 18.8 6.93 195.0 731
160 38 198 30 2.61 7 2.61 18.3 7.83 100 736
160 26 186 26 2.80 7 2.18 17.7 6.54 85.5 646
140 33 173 30 2.44 7 2.44 17.1 7.32 87.4 643
140 23 163 26 2.62 7 2.04 16.6 6.12 74.9 565
A
Only those strandings with a relatively high steel content are listed. Other strandings are available by agreement between the purchaser and the producer.
B
Rated strengths are for AACSR/GA2 and AACSR/MA2 conductors. Strengths were calculated in accordance with 9.1.
C
Mass applies to AACSR/GA and AACSR/MA conductors, all strength grades.
4.1.3 Number of wires, aluminumaluminum-alloy and steel;
4.1.4 Type of steel core wire and, if galvanized or Zn-5Al-MM coated, class (A or C) of coating (see 5.2);
4.1.5 Direction of lay of outer layer of aluminumaluminum-alloy wires if other than right-hand (see 7.27.4);
4.1.6 Special tension test, if required (see 9.2);
4.1.7 Place of inspection (Section 15);
4.1.8 Special package marking, if required (Section 16);
4.1.9 Package size (see 17.1); and
4.1.10 Heavy wood lagging, if required (see 17.3).
B711 − 22
5. Requirement for Wires
5.1 Before stranding, the aluminum-alloy wire shall meet the requirements of Specification B398/B398M.
5.2 Before stranding, the steel core wire shall meet the requirements of Specifications B498/B498M, B502B502/B502M,
B606B606/B606M, B802/B802M, B803B803/B803M, B957B957/B957M or B958B958/B958M, whichever is applicable.
5.3 Steel core supplied in a stranded construction shall meet the requirements of Specification B500/B500M, if applicable.
6. Joints
6.1 Cold-pressure welds, electric-butt welds, and electric-butt, cold-upset welds in the finished individual aluminum alloy wires
composing the conductor may be made during the stranding process. Following welding, electric-butt welds shall be annealed for
a distance of at least 150 mm on each side of the weld. No weld shall occur within 15 m of a weld in the same wire or in any
other wire of the completed conductor (Explanatory Note 3).
6.2 There shall be no joints made in the finished steel wires.
7. Lay Factors
7.1 The length of lay inof the various layers of aluminum alloy aluminum-alloy wire in a conductor shall conform to Table 2
(Explanatory Note 4).
7.2 The direction of lay of the outside layer of aluminum-alloy wires shall be right-hand unless otherwise specified in the purchase
order. The direction In a conductor having multiple layers of aluminum-alloy wires, the length of lay of any aluminum-alloy layer
shall not be less than the length of lay of the aluminum alloy and steel wires shall be reversed in successive layers.aluminum-alloy
layer immediately beneath it.
7.3 The length of lay in the various layers of steel wire in a conductor shall conform to the requirements of Specification
B500/B500M.
7.4 In a conductor having multiple layers of aluminum wires, the lay ratio of any aluminum layer shall not be greater than the
lay ratio of the aluminum layer immediately beneath it. Similarly, in a conductor having multiple layers of steel wires in the core,
the lay ratio of a steel layer shall not be greater than the lay ratio of the steel layer immediately beneath it.The direction of lay
of the outside layer of aluminum-alloy wires shall be right-hand unless otherwise specified in the purchase order. The direction
of lay of the aluminum-alloy and steel wires shall be reversed in successive layers.
8. Construction
8.1 The number and diameter of aluminum alloy aluminum-alloy and steel wires and the areas of cross section of aluminum alloy
aluminum-alloy wires shall conform to the requirements prescribed in Table 1.
9. Rated Strength of Conductor
9.1 The rated strength of a conductor shall be taken as the sum of the strengths of the aluminum alloy aluminum-alloy and steel
components, calculated as follows:
A
TABLE 2 Lay Factors of Aluminum-Alloy Conductors Steel Reinforced
Ratio of Length of Lay of a Layer to Nominal Outside Diameter of That Layer
Aluminum-Alloy Wire Layers
Stranding
First (Outside) Second Third Fourth
Min Max Min Max Min Max Min Max
84/19, 76/19 10 13 10 16 10 17 10 17
42/7, 45/7, 48/7, 54/19 10 13 10 16 10 17 . .
24/7, 26/7, 30/7 10 13 10 16 . . . .
12/7, 16/19 10 14.5
A
Lay factors of steel wire layers; see Specification B500/B500M.
B711 − 22
9.1.1 The strength contribution of the aluminum-alloy wires shall be the sum of the strengths of the 6201 wire
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