ASTM B624-99(2005)e1
(Specification)Standard Specification for High-Strength, High-Conductivity Copper-Alloy Wire for Electronic Application
Standard Specification for High-Strength, High-Conductivity Copper-Alloy Wire for Electronic Application
SCOPE
1.1 This specification covers high-strength, high-conductivity round copper-alloy wire 0.0031 to 0.0720 in. [0.079 to 1.829 mm] in diameter, used for electronic hookup wire. The tensile strength of the wire is 60 ksi [414 MPa] minimum and the electrical conductivity at 20C is 85 % IACS minimum.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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.
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Designation: B 624 – 99 (Reapproved 2005)
Standard Specification for
High-Strength, High-Conductivity Copper-Alloy Wire for
Electronic Application
This standard is issued under the fixed designation B 624; 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.
e NOTE—Reference to military approval (DoD) was removed in March 2005.
1. Scope 4. Materials and Manufacture
1.1 This specification covers high-strength, high- 4.1 The wire shall be copper alloy of such quality and purity
conductivity round copper-alloy wire 0.0031 to 0.0720 in. that the finished product shall have the properties and charac-
[0.079 to 1.829 mm] in diameter, used for electronic hookup teristics prescribed in this specification. Chemical analysis of a
wire. The tensile strength of the wire is 60 ksi [414 MPa] specific alloy is not a requirement of this specification unless
minimum and the electrical conductivity at 20°C is 85 % IACS definite agreement is reached between the manufacturer and
minimum. the purchaser in the placing of individual orders.
1.2 The values stated in inch-pound units are to be regarded
5. General Requirements General Requirements
as the standard. The values given in parentheses are for
information only. 5.1 Tensile Properties—The minimum breaking strength
and elongation of the conductor shall be as prescribed in Table
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 1. Breaking strengths of intermediate sizes may be calculated
in accordance with Explanatory Note 1.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- 5.2 Electrical Resistance—The electrical resistance of the
wire at a temperature of 20°C shall not exceed the values in
bility of regulatory limitations prior to use.
Table 1. Resistances of intermediate sizes may be calculated in
2. Referenced Documents
accordance with Explanatory Note 2.
2.1 ASTM Standards: 5.3 Diameter—The wire size shall be expressed as the
B 193 Test Method for Resistivity of Electrical Conductor diameter of the wire in decimal fractions of an inch to the
Materials nearest 0.0001 in. [0.003 mm]. For diameters under 0.0100 in.
E8 Test Methods for Tension Testing of Metallic Materials [0.254mm],thewireshallnotvaryfromthespecifieddiameter
by more than 60.0001 in. For diameters 0.0100 in. and over,
3. Ordering Information
the wire shall not vary from the specified diameter by more
3.1 Orders for wire furnished to this specification shall than 61 %, expressed to the nearest 0.0001 in.
include the following information:
5.4 Joints—Joints necessary to processing shall be of such
3.1.1 Quantity (pounds or kilograms), quality that all requirements of this specification are met.
3.1.2 Wire size (Table 1),
5.5 Finish—The finished material shall be free of defects
3.1.3 Place of inspection (Section 7), that detract from the normal end use or longevity of the
3.1.4 Package size (Section 9), and
product.Thematerialshallbesmooth,bright,clean,andfreeof
3.1.5 Special marking, if required (Section 9). laps, slivers, seams, scratches, and other imperfections not
consistent with good commercial practice.
This specification is under the jurisdiction of ASTM Committee B01 on 6. Test Method
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
6.1 Breaking Strength and Elongation—Conduct tension
Conductors of Copper and Copper Alloys.
and elongation tests in accordance with Test MethodsE8 and
Current edition approved March 1, 2005. Published March 2005. Originally
approved in 1977. Last previous edition approved in 1999 as B 624 – 99.
with a rate of loading not to exceed 10 in./min [250 mm/min].
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
The breaking strength shall equal or exceed the value specified
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
in Table 1.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B 624 – 99 (2005)
TABLE 1 Tensile Properties and Resistance
Nominal Diameter Breaking Strength, min Elongation, Resistance, max, at 20°C
min,%in10in.
in. mm lbf N V/1000 ft V/km
or 250 mm
0.0720 1.829 239 1065 9 2.40 7.88
0.0641 1.628 190 844 9 3.03 9.94
0.0571 1.450 151 670 9 3.82 12.5
0.0508 1.290 119 530 9 4.82 15.8
0.0453 1.151 94.8 422 9 6.08 19.9
0.0403 1.024 75.0 334 9 7.66 25.1
0.0359 0.912 59.5 265 9 9.68 31.7
0.0320 0.813 47.3 210 9 12.1 39.9
0.0285 0.724 37.5 167 9 15.3 50.2
0.0253 0.643 29.6 132 9 19.5 63.7
0.0226 0.574 23.6 105 9 24.3 80.0
0.0201 0.511 18.7 83.1 9 30.8 101
0.0179 0.455 14.8 65.8 9 38.9 128
0.0159 0.404 11.7 52.0 9 49.5 161
0.0142 0.361 9.31 41.4 9 61.4 202
0.0126 0.320 7.33 32.6 9 78.1 257
0.0113 0.287 5.90 26.2 8 97.3 320
0.0100 0.254 4.62 20.6 8 124 408
0.0089 0.226 3.65 16.2 8 158 517
0.0080 0.203 2.94 13.1 195 643
0.0071 0.180 2.31 10.3 8 249 820
0.0063 0.160 1.81 8.1 8 317 1040
0.0056 0.142 1.43 6.3 8 403 1330
0.0050 0.127 1.13 5.0 7 508 1670
0.0045 0.114 0.91 4.0 7 630 2080
0.0040 0.102 0.72 3.2 7 802 2610
0.0035 0.089 0.54 2.4 7 1060 3450
0.0031 0.079 0.42 1.9 7 1360 4410
6.2 Resistance—MeasureresistanceinaccordancewithTest 7.2 Description of Inspection Terms:
Method B 193.
7.2.1 Lot—An inspection lot shall consist of an identifiable
6.3 Diameter—Make diameter measurements with a mi-
quantity of wire subjected to inspection at one time. Each lot
crometer caliper equipped with a vernier graduated in 0.0001
shall consist of units of wire of the same size and temper,
in. or 0.002 mm. Gage each coil in three places, one near each
manufactured under essentially the same conditions at essen-
end and one near the center. From each spool, unreel approxi-
tially the same time. The amount in any case shall not exceed
mately 12 ft [4 m] and gage the wire in six places between the
100 production units.
second and twelfth foot from the end. The average of the
7.2.2 Sample—A sample is a quantity of production units
measurements obtained shall be considered the wire size
(coils, reels, and so forth) selected at random from the lot for
specified in 5.3.
the purpose of determining conformance of the lot to the
7. Inspection requirements of this specification.
7.1 General—All tests and inspections shall be made at the 7.2.3 Specimen—A specimen is a length of wire removed
plac
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