ASTM B355-11

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B355–06 Designation: B355 – 11
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.
1. Scope
1.1 This specification covers nickel-coated, soft or annealed, round copper wire for use in electrical equipment.
1.2 Five classes of wire are covered as follows:
1.2.1 Class 2—Wire whose nickel coating is at least 2 % of the total weight of the coated wire.
1.2.2 Class 4—Wire whose nickel coating is at least 4 % of the total weight of the coated wire.
1.2.3 Class 7—Wire whose nickel coating is at least 7 % of the total weight of the coated wire.
1.2.4 Class 10—Wire whose nickel coating is at least 10 % of the total weight of the coated wire.
1.2.5 Class 27—Wire whose nickel coating is at least 27 % of the total weight of the coated wire.
NOTE 1—For information purposes, the thickness of coating in microinches provided by the percentages listed in 1.2 is shown in Table 1.
1.3The SI values for density and resistivity are to be regarded as the 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 values stated in inch-pound units are to be regarded as standard. The values given in parenthesis are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.3.1 Exceptions—The SI values for density, resistivity, and volume are to be regarded as standard.
1.4 This hazard statement applies only to Section 6,Test Methods, and to theAppendix 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.
2. Referenced Documents
2.1 The following documents of the issue in effect at the time of reference form a part of these methods to the extent referenced
herein:
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2.2 ASTM Standards:
B49 Specification for Copper Rod Drawing Stock for Electrical Purposes
B193 Test Method for Resistivity of Electrical Conductor Materials
B258 Specification for Nominal Diameters and Cross-SectionalAreas ofAWG Sizes of Solid Round Wires Used as Electrical
Conductors
E75 Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys
2.3 NIST:
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NBS Handbook 100—Copper Wire Tables
3. Ordering Information
3.1 Orders for material under this specification shall include the following information:
3.1.1 Quantity of each size,
3.1.2 Wire size, diameter in inches (see 5.3 and Table 1),
3.1.3 Class of coating (Section 1 and Table 1),
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This specification is under the jurisdiction of ASTM Committee B01 on Electrical Conductors and is the direct responsibility of B01.04 on Conductors of Copper and
Copper Alloys.
Current edition approved Oct. 1, 2006. Published October 2006. Originally approved in 1960. Last previous edition approved in 2003 as B355–95 (2003). DOI:
10.1520/B0355-06.
Current edition approvedApril 1, 2011. Published May 2011. Originally approved in 1960. Last previous edition approved in 2006 as B355 – 06. DOI: 10.1520/B0355-11.
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For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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Available from National Technical Information Service (NTIS), 5285 Port Royal Rd., Springfield, VA 22161, http://www.ntis.gov.
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Available from National Technical Information Service (NTIS), 5301 Shawnee Rd., Alexandria, VA 22312, http://www.ntis.gov.
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B355 – 11
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 Nicke
...