ASTM B355-06

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Designation: B355 – 06
Standard Specification for
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Nickel-Coated Soft or Annealed Copper Wire
This standard is issued under the fixed designation B355; 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.
This standard has been approved for use by agencies of the Department of Defense.
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1. Scope 2.2 ASTM Standards:
B49 Specification for Copper Rod Drawing Stock for Elec-
1.1 This specification covers nickel-coated, soft or an-
trical Purposes
nealed, round copper wire for use in electrical equipment.
B193 Test Method for Resistivity of Electrical Conductor
1.2 Five classes of wire are covered as follows:
Materials
1.2.1 Class 2—Wire whose nickel coating is at least 2 % of
B258 Specification for Nominal Diameters and Cross-
the total weight of the coated wire.
SectionalAreas ofAWG Sizes of Solid Round Wires Used
1.2.2 Class 4—Wire whose nickel coating is at least 4 % of
as Electrical Conductors
the total weight of the coated wire.
E75 Test Methods for ChemicalAnalysis of Copper-Nickel
1.2.3 Class 7—Wire whose nickel coating is at least 7 % of
and Copper-Nickel-Zinc Alloys
the total weight of the coated wire.
2.3 NIST:
1.2.4 Class 10—Wire whose nickel coating is at least 10 %
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NBS Handbook 100—Copper Wire Tables
of the total weight of the coated wire.
1.2.5 Class 27—Wire whose nickel coating is at least 27 %
3. Ordering Information
of the total weight of the coated wire.
3.1 Orders for material under this specification shall include
NOTE 1—For information purposes, the thickness of coating in micro-
the following information:
inches provided by the percentages listed in 1.2 is shown in Table 1.
3.1.1 Quantity of each size,
1.3 The SI values for density and resistivity are to be
3.1.2 Wire size, diameter in inches (see 5.3 and Table 1),
regarded as the standard. For all other properties the inch-
3.1.3 Class of coating (Section 1 and Table 1),
poundvaluesaretoberegardedasthestandardandtheSIunits
3.1.4 Type of copper, if special (see 4.2),
may be approximate.
3.1.5 Package size (Section 10),
1.4 This hazard statement applies only to Section 6, Test
3.1.6 Special packaging marking, if required, and
Methods, and to the Appendix of this specification. This
3.1.7 Place of inspection (see 9.1).
standard does not purport to address all of the safety concerns,
4. Material
if any, associated with its use. It is the responsibility of the user
of this standard to establish appropriate safety and health
4.1 The material shall be nickel-coated wire (Explanatory
practices and determine the applicability of regulatory limita- Note 1), of such quality and purity that the finished product
tions prior to use.
shall have the properties and characteristics prescribed in this
specification.
2. Referenced Documents
NOTE 2—Specification B49 defines copper suitable for use:
2.1 The following documents of the issue in effect at the
4.2 Copper of special qualities, forms, or types, as may be
time of reference form a part of these methods to the extent
agreed upon between the manufacturer and the purchaser, and
referenced herein:
which will conform to the requirements prescribed in this
specification may also be used.
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This specification is under the jurisdiction of ASTM Committee B01 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Electrical Conductors and is the direct responsibility of B01.04 on Conductors of contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Copper and Copper Alloys. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Oct. 1, 2006. Published October 2006. Originally the ASTM website.
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approved in 1960. Last previous edition approved in 2003 as B355 – 95 (2003). Available from National Technical Information Service (NTIS), 5285 Port
DOI: 10.1520/B0355-06. Royal Rd., Springfield, VA 22161, http://www.ntis.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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B355 – 06
TABLE 1 Tensile Requirements
Elongation in Thickness of Coating, µin.
Area at 20°C (68°F)
10 in., min,% (For Information Only)
Classes Class 2, Class 4, Class 7, Class 10, Class 27,
Diameter, Class
2
cmils in. 2, 4, 7, 2% 4% 7% 10 % 27 %
in. 27
9, and 10 Nickel Nickel Nickel Nickel Nickel
0.1285 16 510 0.01297 25 20 650 1300 2290 3300 9350
0.1144 13 090 0.01028 25 20 570 1160 2040 2940 8330
0.1019 10 380 0.008155 25 20 510 1040 1820 2620 7420
0.0907 8 230 0.00646 25 20 460 920 1620 2330 6610
0.0808 6 530 0.00513 25 20 410 820 144
...