ASTM B470-95

Standard Specification for Bonded Copper Conductors for Use in Hookup Wires for Electronic Equipment

SCOPE
1.1 This specification covers stranded uninsulated bare, tin, or tin-lead alloy coated copper conductors in which wires in the strand are metallically bonded together by the application of heat or additional tin, or tin-lead alloy for use in hookup wire for electronic equipment.  
1.2 The SI values for density and resistivity are to be regarded as standard. For all other properties, the inch-pound values are to be regarded as the standard and the SI units may be approximate.  
1.3 The hazard caveat pertains only to Section 6 of this specification. 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Dec-1994
• ICS: 29.060.10 - Wires
• Technical Committee: B01 - Electrical Conductors
• Drafting Committee: B01.04 - Conductors of Copper and Copper Alloys

Relations

• Replaced By: ASTM B470-02 - Standard Specification for Bonded Copper Conductors for Use in Hookup Wires for Electronic Equipment
• Effective Date: 10-Oct-2002

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NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn.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: B 470 – 95
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Bonded Copper Conductors for Use in Hookup Wires for
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Electronic Equipment
This standard is issued under the fixed designation B 470; 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 4. Conductor Constructions
1.1 This specification covers stranded uninsulated bare, tin, 4.1 Conductor constructions shall conform to the applicable
or tin-lead alloy coated copper conductors in which wires in the constructions of Specification B 286, except that in addition the
strand are metallically bonded together by the application of following bondings may be specified:
heat or additional tin, or tin-lead alloy for use in hookup wire 4.1.1 Type I—Bare copper, stranded, light bonding,
for electronic equipment. 4.1.2 Type II—Tin or tin-lead alloy coated copper, stranded,
1.2 The SI values for density and resistivity are to be light bonding, or
regarded as standard. For all other properties, the inch-pound 4.1.3 Type III—Tin or tin-lead alloy coated copper,
values are to be regarded as the standard and the SI units may stranded, heavy bonding.
be approximate.
5. General Requirements
1.3 The hazard caveat pertains only to Section 6 of this
5.1 The conductors shall consist of tinned copper conform-
specification. This standard does not purport to address all of
ing to the product description, quality and specification re-
the safety concerns, if any, associated with its use. It is the
quirements of Specification B 286 and bare copper conforming
responsibility of the user of this standard to establish appro-
to the product description, quality and specification require-
priate safety and health practices and determine the applica-
ments of Specification B 3.
bility of regulatory limitations prior to use.
5.2 Flex Life—The average of six flex tests specified in 6.1
2. Referenced Documents shall meet the minimum requirements of Table 1 for the
applicable type and construction.
2.1 The following documents of the issue in effect at the
5.3 Fraying, Types I and II—After performing the test in
time of reference form a part of this specification to the extent
6.2, no separations of strands shall be visible to the unaided eye
referenced herein:
(normal spectacles excepted), from the cut end to the point of
2.2 ASTM Standards:
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bend nearest to that cut end.
B 3 Specification for Soft or Annealed Copper Wire
5.4 Mandrel Test, Type III Only (see Explanatory Note
B 286 Specification for Copper Conductors for Use in
2
1)—After performing the test specified in 6.3 no separation of
Hookup Wire for Electronic Equipment
strands shall be visible to the unaided eye (normal spectacles
3. Ordering Information
excepted).
3.1 Orders for material under this specification shall include
6. Test Methods
the following information:
6.1 Flex Life—The testing equipment shall be designed and
3.1.1 Quantity of each size, material, construction, and type
set up for operation so that steel mandrels shall be horizontal
(see 4.1),
and so positioned that any vertical movement of the specimen
3.1.2 Package size (see 8.1),
is minimized. The conductor as clamped for test shall pass
3.1.3 Special package marking if required (Section 8), and
through the vertical center line between the mandrels.
3.1.4 Place of inspection (Section 7).
6.1.1 The conductor shall be bent repeatedly in alternating
3.1.5 In addition, Supplementary Requirements shall apply
directions in an arc of 60° on both sides of the vertical center
only when specified by the purchaser in the inquiry, contract, or
line of the mandrels, at a rate of 24 to 36 cpm, between
purchase order for direct procurement by agencies of the U.S.
mandrels of size and spacing specified in Table 2. The
Government (S1, S2, and S3).
mandrels must be so supported that the specified spacing
during test is maintained. Mandrel deflection must be avoided.
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The conductor shall be clamped at a point not less than 1 in.
This specification is under the jurisdiction of ASTM Committee B-1 on
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
(25.4 mm) above the horizontal center line of the mandrels. A
Conductors of Copper and Copper Alloys.
load, as specified in Table 2, shall be applied to the free end of
Current edition approved July 15, 1995. Published September 1995. Originally
the conductor (Explanatory Note 2) not less than 3 in. (76.2
published as B 470 – 68. Last previous edition B 470 – 90.
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