ASTM B976-21

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.
Designation:B976 −21
Standard Specification for
Fiber Reinforced Aluminum Matrix Composite (AMC) Core
Wire for Aluminum Conductors Aluminum Matrix Composite
1
Reinforced (ACAMCR) (formerly known as ACCR)
This standard is issued under the fixed designation B976; 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 B193 Test Method for Resistivity of Electrical Conductor
Materials
1.1 This specification covers fiber reinforced, aluminum
B830 Specification for Uniform Test Methods and Fre-
matrix composite core wire used for mechanical reinforcement
quency
in the manufacture of aluminum conductor, aluminum matrix
D3552 Test Method for Tensile Properties of Fiber Rein-
composite reinforced (ACAMCR). This wire consists of con-
forced Metal Matrix Composites
tinuous filament fibers of aluminum oxide in a matrix of
aluminum.
3. Terminology
1.2 The values stated in inch-pound units are to be regarded
3.1 Definitions of Terms Specific to This Standard:
as standard. The values given in parentheses are mathematical
3.1.1 ACAMCR, n—Aluminum Conductor Aluminum Ma-
conversions to SI units that are provided for information only
trix Composite Reinforced, a concentric-lay-stranded conduc-
and are not considered standard.
tor made up of outer aluminum strands of hard, heat resistant
1.2.1 Exception—Some non-standard SI units provided for
aluminum wires and a core of round, aluminum matrix
information only do not appear in brackets.
composite wire(s), for use as overhead electrical conductors.
1.3 This standard does not purport to address all of the
3.1.2 AMC, n—Aluminum Matrix Composite, a material
safety concerns, if any, associated with its use. It is the
consisting of two constituents: the first a series of continuous
responsibility of the user of this standard to establish appro-
fibers of aluminum oxide which is embedded in the second
priate safety, health, and environmental practices and deter-
constituent of aluminum metal.
mine the applicability of regulatory limitations prior to use.
3.1.3 fiber reinforced aluminum matrix composite wire, n—a
1.4 This international standard was developed in accor-
wire consisting of two constituents: the first a number of
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the continuous fibers of aluminum oxide along the axis of the wire,
which is embedded in the second constituent of aluminum
Development of International Standards, Guides and Recom-
metal, as shown in Fig. 1.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3.1.4 lot, n—unless otherwise specified in the contract or
order, a lot shall consist of all coils of wire of the same
2. Referenced Documents
diameter submitted for inspection at the same time.
2.1 The following documents of the issue in effect on date
3.1.5 production unit, n—a reel, spool, or other package of
of material purchase form a part of this specification to the
wire that represents a single usable length.
extent referenced herein.
3.1.6 sample, n—the production unit(s) from which a test
2
2.2 ASTM Standards:
specimen(s) has been removed, and which is considered to
have properties representative of the lot.
3.1.7 specimen, n—a length of wire removed for test pur-
1
This specification is under the jurisdiction of ASTM Committee B01 on
poses.
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on
Conductors of Light Metals.
3.1.8 tow, n—a bundle, containing multiple fibers.
Current edition approved Oct. 1, 2021. Published October 2021. Originally
approved in 2011. Last previous edition approved in 2015 as B976 – 11 (2015).
4. Ordering Information
DOI: 10.1520/B0976-21.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.1 Orders for material under this specification shall include
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
the following information:
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.1.1 Quantity of each size,
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B976−21
NOTE 1—Dark Phases are fiber viewed end-on and the light phase is aluminum matrix. The equivalent diameter of the fibers is approximately 470 µin.
(12 µm).
FIG. 1Polis
...