ASTM B500/B500M-98(2002)
(Specification)Standard Specification for Metallic Coated Stranded Steel Core for Aluminum Conductors, Steel Reinforced (ACSR)
Standard Specification for Metallic Coated Stranded Steel Core for Aluminum Conductors, Steel Reinforced (ACSR)
ABSTRACT
This specification covers zinc-coated (galvanized), zinc-aluminum-mischmetal alloy-coated, and aluminum-coated (aluminized) stranded steel wire core inserted for use in aluminum conductors, steel reinforced (ACSR). Prior to stranding, the metallic coated steel wire to be used in the production of the stranded core shall meet all of the requirements of the appropriate specification. Requirements for (1) coated steel wire joints, (2) stranding of the core such as lay length and lay direction, (3) construction of ACSR, and (4) tensile properties of stranded core are detailed. The standard stranded core lengths and methods of determining rated strength and calculating loads are given.
SCOPE
1.1 This specification covers 7-wire, 19-wire, 37-wire, and 61-wire zinc-coated (galvanized), zinc-5 % aluminum-mischmetal alloy-coated, and aluminum-coated (aluminized) stranded steel core inserted for use in aluminum conductors, steel reinforced (ACSR).
1.2 The values stated in inch-pound units are to be regarded separately as standard. The values in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.
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Designation: B 500/B 500M – 98 (Reapproved 2002)
Standard Specification for
Metallic Coated Stranded Steel Core for Aluminum
Conductors, Steel Reinforced (ACSR)
This standard is issued under the fixed designation B 500/B 500M; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This specification covers 7-wire, 19-wire, 37-wire, and 3.1 Definitions of Terms Specific to This Standard:
61-wire zinc-coated (galvanized), zinc-5 % aluminum- 3.1.1 lot—unless otherwise specified in the contract or
mischmetal alloy-coated, and aluminum-coated (aluminized) order, a lot shall consist of all coils or reels of strand of the
stranded steel core inserted for use in aluminum conductors, same diameter and unit lengths submitted for inspection at the
steel reinforced (ACSR). same time.
1.2 The values stated in inch-pound units are to be regarded
4. Ordering Information
separately as standard. The values in each system are not exact
4.1 Orders for material under this specification shall include
equivalents;therefore,eachsystemshallbeusedindependently
of the other. Combining values from the two systems may the following information:
4.1.1 Length of each construction,
result in nonconformance with this specification.
4.1.2 Constructional description of stranded core (for ex-
2. Referenced Documents
ample, 7 by 0.0943 in. or 19 by 0.0977 in.) (8.1 and 8.2),
2.1 ASTM Standards: 4.1.3 Nominal unit length of stranded core and multiple
B 232/B 232M Specification for Concentric-Lay-Stranded lengths, if allowed (8.3 and Section 15),
Aluminum Conductors, Coated-Steel Reinforced (ACSR) 4.1.4 Coating, zinc-coated (Class A, B, or C), zinc-5 %
B 341/B 341M Specification for Aluminum-Coated (Alu- aluminum-mischmetal-coated(ClassA,B,orC),oraluminum-
minized) Steel Core Wire forAluminum Conductors, Steel coated (Section 5),
Reinforced (ACSR/AZ) 4.1.5 Direction of lay of outer layer (Section 7),
B 498/B 498M Specification for Zinc-Coated (Galvanized) 4.1.6 Packaging (Section 15), and
Steel Core Wire for Aluminum Conductors, Steel Rein- 4.1.7 Place of inspection (Section 13).
forced (ACSR)
5. Material
B 606 Specification for High-Strength Zinc-Coated (Galva-
nized) Steel Core Wire for Aluminum and Aluminum- 5.1 The coated steel wire used in the production of the
stranded core shall, prior to stranding, meet all of the require-
Alloy Conductors, Steel Reinforced
B 802/B 802M Specification for Zinc-5 % Aluminum- ments of the appropriate specification that follows:
5.1.1 Specification B 341/B 341M,
Mischmetal Alloy-Coated Steel Core Wire for Aluminum
Conductors, Steel Reinforced (ACSR) 5.1.2 Specification B 498/B 498M,
5.1.3 Specification B 606,
B 803 Specification for High-Strength Zinc-5 %
Aluminum-Mischmetal Alloy-Coated Steel Core Wire for 5.1.4 Specification B 802/B 802M, and
5.1.5 Specification B 803.
Aluminum and Aluminum-Alloy Conductors, Steel Rein-
forced
6. Joints
E 83 Practice for Verification and Classification of Exten-
6.1 There shall be no joints of any kind made in the finished
someter System
zinc-coated, zinc-5 % aluminum-mischmetal alloy-coated, or
aluminum-coated steel wires.
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.05 on
Conductors of Ferrous Metals.
Current edition approved Sept. 10, 1998. Published November 1998. Originally
published as B 500 – 69. Last previous edition B 500 – 97.
Annual Book of ASTM Standards, Vol 02.03.
Annual Book of ASTM Standards, Vol 03.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
B 500/B 500M – 98 (2002)
7. Stranding 10. Tensile Properties
10.1 Theratedstrengthat1 %extensionofstrandedcorefor
7.1 The lay length of the 6-wire layer of 7 and 19-wire
ACSR shall be taken as that percentage according to the
stranded core shall be not less than 18 or more than 30 times
number of wires, indicated below, of the sum of the strengths
the outside diameter of the 6-wire layer. (Outside diameter is
of the steel wires, calculated from their specified nominal wire
three times nominal wire diameter.)
diameter and the appropriate specified minimum stress at 1 %
7.2 Thelaylengthofthe12-wirelayerofa19-wirestranded
extension given in Specifications B 341/B 341M, B 498/
core shall be not less than 16 nor more than 24 times the
B 498M, B 606, B 802/B 802M, or B 803:
outside diameter of the 12-wire layer. (Outside diameter is five
times nominal wire diameter.)
72wire strand—96 % of sum of components
7.3 Thelaylengthofthe18-wirelayerofa37-wirestranded
192wire strand—93 % of sum of components
core shall be not less than 14 nor more than 20 times the
372wire strand—91 % of sum of components
outside diameter of the 18-wire layer. (Outside diameter is
612wire strand—90 % of sum of components
seven times nominal wire diameter.)
10.2 Stranded steel core samples shall sustain loads equal to
7.4 Thelaylengthofthe24-wirelayerofa61-wirestranded
the values computed by the method of 10.1.
core shall be not less than 14 nor more than 18 times the
10.3 For determining compliance with the rated strength at
outside diameter of the 24-wire layer. (Outside diameter is nine
1 % extension, use a Class B-1, B-2, or C extensometer as
times nominal wire diameter.)
described in Practice E 83. The gage length shall be not less
7.5 The steel wires shall be so stranded that when the
than 20 in. (500 mm).
stranded core is cut the individual wires can be readily
10.4 Apply an initial load computed from T
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