ASTM B803-98
(Specification)Standard Specification for High-Strength Zinc-5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Aluminum and Aluminum-Alloy Conductors, Steel Reinforced
Standard Specification for High-Strength Zinc-5% Aluminum-Mischmetal Alloy-Coated Steel Core Wire for Aluminum and Aluminum-Alloy Conductors, Steel Reinforced
SCOPE
1.1 This specification covers round, high strength, zinc-5% aluminum-mischmetal (Zn-5A1-MM) alloy-coated, steel core wire with Class A Zn-5A1-MM alloy coating used for mechanical reinforcement in the manufacture of special aluminum and aluminum-alloy conductors, steel reinforced.
1.2 This specification covers wire of diameter from 0.0500 to 0.1900 in. inclusive.
1.3 The SI values for resistivity are regarded as standard. For all other properties the inch-pound units are regarded as standard and the SI units may be approximate.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
Designation: B 803 – 98
Standard Specification for
High-Strength Zinc–5 % Aluminum-Mischmetal Alloy-Coated
Steel Core Wire for Aluminum and Aluminum-Alloy
Conductors, Steel Reinforced
This standard is issued under the fixed designation B 803; 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 Aluminum-MischmetalAlloys by ICPEmission Spectrom-
etry
1.1 This specification covers round, high strength, zinc–5 %
2.3 Other Standard:
aluminum-mischmetal (Zn–5A1–MM) alloy-coated, steel core
GF-1 tandard Practice for Determination of Cerium and
wire with Class A Zn–5A1–MM alloy coating used for
Lanthanum Compositions in GalfanAlloy (5 %Al-0.04 %
mechanical reinforcement in the manufacture of special alumi-
La-0.04 % Ce-Bal SHG Zn)
num and aluminum-alloy conductors, steel reinforced.
1.2 This specification covers wire of diameter from 0.0500
3. Terminology
to 0.1900 in. inclusive.
3.1 Abbreviations:Abbreviations:
1.3 The SI values for resistivity are regarded as standard.
3.1.1 MM—mischmetal
For all other properties the inch-pound units are regarded as
3.1.2 Zn–5A1–MM—zinc–5 % aluminum mischmetal
standard and the SI units may be approximate.
3.2 Definitions:
2. Referenced Documents 3.2.1 lot—unless otherwise specified in the contract or
order, a lot shall consist of all coils of wire of the same
2.1 The following documents of the issue in effect on date
diameter and unit lengths submitted for inspection at the same
of material purchase form a part of this specification to the
time.
extent referenced herein.
2.2 ASTM Standards:
4. Ordering Information
A 90/A90M Test Method for Weight [Mass] of Coating on
2 4.1 Orders for material under this specification shall include
Iron and Steel Articles with Zinc or Zinc-Alloy Coatings
the following information:
A 370 Test Methods and Definitions for MechanicalTesting
3 4.1.1 Quantity of each size,
of Steel Products
4.1.2 Wire diameter in inches (Section 7),
A 751 Test Methods, Practices, and Terminology for
3 4.1.3 Certification, if required (Section 18),
Chemical Analysis of Steel Products
4.1.4 Test report, if required (Section 18), and
B 193 Test Method for Resistivity of Electrical Conductor
4 4.1.5 Package Size (Section 19).
Materials
B 750 Specification for Zinc–5 % Aluminum-Mischmetal
5. Materials and Manufacture
Alloy (UNS Z38510) in Ingot Form for Hot-Dip Coatings
5.1 The base metal shall be steel produced by the open-
E47 Test Methods for Chemical Analysis of Zinc Die-
6 hearth, electric furnace, or basic oxygen process.
Casting Alloys
5.2 The wire shall be cold drawn and coated with
E 1277 Test Method for Chemical Analysis of Zinc-5
Zn–5A1–MM alloy to produce the desired properties.
6. Chemical Composition
This specification is under the jurisdiction of ASTM Committee B-01 on
6.1 The steel shall conform to the requirements prescribed
Electrical Conductors and is the direct responsibility of Subcommittee B01.05 on
in Table 1.
Conductors of Ferrous Metals.
6.2 Chemical analysis of the steel shall be conducted in
Current edition approved Sept. 10, 1998. Published November 1998. Originally
published as B 803 – 89. Last previous edition B 803 – 94. accordance with Test Methods A 751A 751.
Annual Book of ASTM Standards, Vol 01.06.
Annual Book of ASTM Standards, Vol 01.03.
4 7
Annual Book of ASTM Standards, Vol 02.03. Annual Book of ASTM Standards, Vol 03.06.
5 8
Annual Book of ASTM Standards, Vol 02.04. Available from International Lead Zinc Research Organization, 2525 Meridian
Annual Book of ASTM Standards, Vol 03.05. Parkway, P.O. Box 12036, Research Triangle Park, NC 27709-2036
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Please contact ASTM International (www.astm.org) for the latest information.
B 803–98
TABLE 1 Chemical Requirements
9. Tensile Test
Element Composition, %
9.1 The Zn–5A1–MM-coated steel core wire shall conform
Carbon 0.50 to 0.88
to the tensile and elongation requirements prescribed in Table
Manganese 0.50 to 1.30
3.
Phosphorus, max 0.035
9.2 Tensile tests shall be conducted in accordance with Test
Sulfur, max 0.045
Silicon 0.10 to 0.35
MethodsA 370A 370, using the initial settings for determining
stress at 1 % extension given in Table 4 of this specification.
9.3 Test Specimens—The test specimens shall be free of
bendsorkinksotherthanthecurvatureresultingfromtheusual
6.3 The ingot form of zinc-5 % aluminum-mischmetal alloy
coiling operations.Any hand straightening necessary to permit
shall conform to Specification B 750B 750.
insertion of the specimen in the jaws of the testing machine
6.3.1 For a two-step coating operation where the first
shall be performed by drawing between wood blocks or by
coating is zinc (hot-dip galvanized or electrogalvanized), the
some other equally satisfactory means.
final bath may have an aluminum content of up to 7.2 %, to
prevent depletion of the aluminum content of the bath.
10. Wrap Test
6.3.2 Method of Analysis—The determination of chemical
10.1 The material, as represented by the test specimens,
composition shall be made in accordance with suitable chemi-
shall not fracture when the Zn–5A1–MM alloy-coated wire is
cal (Test Methods E 47E47 for Tin), ICP Argon Plasma
wrapped at a rate not exceeding 15 turns/min in a close helix
Spectrometric (Test Method E 1277E 1277), or other methods.
of at least eight turns around a cylindrical mandrel with a
In case of dispute, the results secured by Test Method
diameter equal to three times the specified diameter of the wire
E 1277E 1277 shall be the basis of acceptance.
under test,65%.
6.3.3 A standard practice of X-ray fluorescence spectrom-
etry for determination of cerium and lanthanum in a
11. Coating Test
Zn–5A1–MM alloy has been established by the International
11.1 The Zn–5A1–MM alloy-coated wire shall conform to
Lead Zinc Research Organization (Standard Practice GF-1). In
the coating requirements prescribed in Table 5.
case of dispute, the results secured by Test Method
11.2 The coating test shall be conducted in accordance with
E 1277E 1277 shall be the basis of acceptance.
Test Method A 90A 90/A90M/A 90M.
7. Dimensions and Permissible Variations
12. Adherence of Coating Test
7.1 The specified diameter of the Zn–5A1–MM alloy-
12.1 The Zn–5A1–MM alloy-coated wire shall be capable
coated wire shall be expressed in decimal fractions of an inch
of being wrapped in a close helix at a rate not exceeding 15
to four decimal places, or in millimetres to three decimal
turns/min around a cylindrical mandrel having a diameter as
places.
prescribedinTable6,withoutcrackingorflakingthecoatingto
7.2 For diameter measurements and diameter tolerance,
such an extent that any Zn–5A1–MM alloy can be removed by
specified diameters shall be rounded to the closest 0.0005 in.
rubbing with the bare fingers.
(0.013 mm).
NOTE 1—Loosening or detachment during the adhesion test of super-
7.3 The average of the largest and smallest diameter read-
ficial, small particles of Zn–5A1–MM alloy formed by mechanical
ings,eachtothenearest0.001in.(0.025mm)takenatthesame
polishing of the surface of the coated wire shall not be considered cause
cross section, shall not differ from the specified diameter by
for rejection.
more than the tolerances shown in Table 2.
13. Joints
8. Workmanship, Finish, and Appearance
13.1 No joints shall be made in the finished wire.
8.1 The Zn–5A1–MM alloy coating shall be reasonably 13.2 Joints may be made at any stage of processing prior to
smooth, continuous, of reasonably uniform thickness and free final cold drawing by the electric butt-weld or flash or
of imperfections not consistent with good commercial practice. flash-welding process.
TABLE 2 Permissible Variations in Diameter of Zn–5A1–MM Alloy-Coated Steel Wire
NOTE 1— It is recognized that the surface of coatings, pa
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