ASTM B941-05

Standard Specification for Heat Resistant Aluminum-Zirconium Alloy Wire for Electrical Purposes

ABSTRACT
The specification covers heat resistant aluminum-zirconium alloy round wire for electrical purposes. There is a family of aluminum-zirconium alloys that are used for heat resistance, which differ by zirconium content, tensile strength, electrical conductivity, and maximum use temperature. The aluminum wire shall be made from drawing stock. The materials shall conform to the required mechanical properties such as tensile strength and elongation. Heat resistance, electrical resistivity, and diameter of the wire shall be measured. The density of aluminum-zirconium alloy shall be taken for the purpose of calculating mass, cross-section, and so forth. Wire shall be supplied in one continuous lengths of reel. coil, or spool. Joints may be made in the drawing stock or wire prior to final drawing by electrical-butt welding, cold-pressure welding, or by electric-butt, cold-upset welding.
SCOPE
1.1 This specification covers heat resistant aluminum-zirconium alloy round wire for electrical purposes. There is a family of aluminum-zirconium alloys that are used for heat-resistance (i.e. resist annealing), which differ by zirconium content, tensile strength, electrical conductivity, and maximum use temperature. This standard covers one currently commercially applicable alloy from this family.
1.2 The values stated in inch-pound units are standard. The SI equivalents of inch-pound units may be approximate.

General Information

• Status: Historical
• Publication Date: 30-Sep-2005
• ICS: 77.150.10 - Aluminium products
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.07 - Conductors of Light Metals

Relations

• Replaced By: ASTM B941-10 - Standard Specification for Heat Resistant Aluminum-Zirconium Alloy Wire for Electrical Purposes
• Effective Date: 15-Oct-2010

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: B941 – 05
Standard Specification for
Heat Resistant Aluminum-Zirconium Alloy Wire for Electrical
1
Purposes
This standard is issued under the fixed designation B941; 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 (ϵ) indicates an editorial change since the last revision or reapproval.
1. Scope tion conditions, and. is presented for acceptance at the same
time (Explanatory Notes 1 and 2).
1.1 This specification covers heat resistant aluminum-
3.1.2 production unit—a coil, reel, spool, or other package
zirconium alloy round wire for electrical purposes. There is a
of wire that represents a single usable length.
family of aluminum-zirconium alloys that are used for heat-
3.1.3 sample—the production unit(s) from which a test
resistance (i.e. resist annealing), which differ by zirconium
specimen(s) has been removed, and which is considered to
content, tensile strength, electrical conductivity, and maximum
have properties representative of the lot.
use temperature. This standard covers one currently commer-
3.1.4 specimen—alengthofwireremovedfortestpurposes.
cially applicable alloy from this family.
1.2 The values stated in inch-pound units are standard. The
4. Ordering Information
SI equivalents of inch-pound units may be approximate.
4.1 Orders for material under this specification shall include
2. Referenced Documents the following information:
4.1.1 Quantity of each size,
2.1 The following documents of the issue in effect on the
4.1.2 Wire size (see 11.1 and 11.2),
dateofmaterialpurchaseformapartofthisspecificationtothe
4.1.3 Special tension test, if required (see 6.1, 6.2 and 7.1),
extent referenced herein.
2
4.1.4 Frequency of bending test (see 8.1 and 14.7),
2.2 ASTM Standards:
4.1.5 Special jointing procedures, if permitted (see 12.1),
B193 Test Method for Resistivity of Electrical Conductor
4.1.6 Place of inspection (see 16.2),
Materials
4.1.7 Package size and type (see 17.1),
B557 Test Methods for Tension Testing Wrought and Cast
4.1.8 Special package marking, if required (see 17.4).
Aluminum- and Magnesium-Alloy Products
B830 Specification for Uniform Test Methods and Fre-
5. Materials and Manufacture
quency
5.1 The aluminum wire shall be made from drawing stock
2.3 N1ST Documents:
3 meeting the requirements of Redraw Rod, as set forth in Table
NBS Handbook 100-Copper Wire Tables
3 1.
NBS Handbook 109-Aluminum Wire Tables
5.2 The wire shall be aluminum-zirconium alloy of such
3. Terminology quality and purity that the finished product shall have the
properties and characteristics prescribed in this specification,
3.1 Definitions of Terms Specific to This Standard:
including tensile, elongation, heat resistance properties, bend-
3.1.1 lot—a group of production units, up to 30 000 1b [15
ing properties, and electrical resistivity. Chemical analysis of a
000 kg] of mass, of one type and size of wire, which was
specific alloy is not a requirement of this specification unless
produced during the same time period, under similar produc-
definite agreement is reached between the manufacturer and
the purchaser on individual orders.
1
This specification is under the jurisdiction of ASTM Committee B01 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.07 on
6. Tensile Properties
Conductors of Light Metals.
6.1 Tensile Strength and Elongation—The wire shall con-
Current edition approved Oct. 1, 2005. Published October 2005. DOI: 10.1520/
B0941-05.
form to the tensile strength and elongation requirements set
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
forth in Table 2 (Explanatory Note 3).
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.2 When requested by the purchaser, tension tests shall be
Standards volume information, refer to the standard’s Document Summary page on
made of specimens of wire containing joints made in the
the ASTM website.
3
Available from National Institute of Standards and Technology (NIST),
drawing stock or in the wire prior to final drawing. Such tests
Gaithersburg, MD 20899.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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B941 – 05
TABLE 1 Properties of Al-Zr Redraw Rod TABLE 3 Temperature Correction Factors for Electrical
Resistance
Property Value
Resistance Temperature (°C) Multiplying Factor for the conversion to
Min. Tensile Strength 17.4 ksi (120 MPa)
20°C
Minimum Elongation 8 %
Minimum Conductivity 60.5 % IACS at 20°C (68°F)
0 1.078
2
Maximum Resistivity 17.14 Ω.cmil/ft (0.0285 Ω.mm/m)at20°C 5 1.057
(68°F)
10 1.037
15 1.018
20 1
25 0.9
...