ASTM B986-13
(Test Method)Standard Test Method for Determination of Tensile Strength by Mass Method for Stranded Conductors Intended for use in Electronic Application
Standard Test Method for Determination of Tensile Strength by Mass Method for Stranded Conductors Intended for use in Electronic Application
SIGNIFICANCE AND USE
4.1 This test method is designed as an inspection or acceptance test of tensile strength for stranded metallic conductors.
SCOPE
1.1 This test method covers the procedure for determining the tensile strength by a mass method for uninsulated stranded electrical conductors intended for use in electronic application (Explanatory Note 1).
1.1.1 The test method is intended for conductors that are one type of wire (non-composite). The wire type being plain, clad, or coated and stranded together to operate mechanically and electrically as a single conductor.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 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. Some specific hazards statements are given in Section 7 on Hazards.
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Designation: B986 − 13
StandardTest Method for
Determination of Tensile Strength by Mass Method for
Stranded Conductors Intended for use in Electronic
Application
This standard is issued under the fixed designation B986; 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 3. Terminology
1.1 This test method covers the procedure for determining 3.1 Definitions:
the tensile strength by a mass method for uninsulated stranded 3.1.1 For definitions of terms used in this test method, refer
electrical conductors intended for use in electronic application to Terminology B354.
(Explanatory Note 1).
4. Significance and Use
1.1.1 Thetestmethodisintendedforconductorsthatareone
4.1 This test method is designed as an inspection or accep-
type of wire (non-composite). The wire type being plain, clad,
tance test of tensile strength for stranded metallic conductors.
or coated and stranded together to operate mechanically and
electrically as a single conductor.
5. Apparatus
1.2 The values stated in inch-pound units are to be regarded
5.1 Tensile Testing Machine—Machines used for tension
as standard. The values given in parentheses are mathematical
testing shall conform to the requirements of Practices E4.
conversions to SI units that are provided for information only
5.2 Balance, for measurement of mass, accurate to 0.1 %.
and are not considered standard.
5.3 Steel Scale, for measurement of length, with smaller
1.3 This standard does not purport to address all of the
divisions, not greater than ⁄32 in. (1 mm).
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5.4 Jig, or equivalent equipment, for cutting the conductor
priate safety and health practices and determine the applica-
to length and at right angles to its axis.
bility of regulatory limitations prior to use. Some specific
6. Procedure
hazards statements are given in Section 7 on Hazards.
6.1 Breaking Load:
2. Referenced Documents
6.1.1 Conduct tensile test in accordance with Test Methods
E8/E8M and with a rate of loading not to exceed 10 in./min
2.1 ASTM Standards:
(250 mm/min.) (Explanatory Note 2 and Note 3).
B354 Terminology Relating to Uninsulated Metallic Electri-
cal Conductors
6.2 Specimen Mass/Unit Length:
B800 Specification for 8000 Series Aluminum Alloy Wire
6.2.1 Cut the test specimens, making sure that the ends are
for Electrical Purposes—Annealed and Intermediate Tem-
at right angles to the axis of the conductor. The length of test
pers
specimens shall be 2 ft (610 mm) minimum (Explanatory Note
E4 Practices for Force Verification of Testing Machines
2).
E8/E8M Test Methods for Tension Testing of Metallic Ma-
6.2.2 Measure the length of the specimen at room tempera-
terials 1
ture (see Note 1) to the nearest ⁄32 in. (1 mm) and measure the
mass to within 60.1 % accuracy, converting to lb/1000 ft or
kg/km, if weighed in other units.
This practice is under the jurisdiction of ASTM Committee B01 on Electrical
Conductors and is the direct responsibility of Subcommittee B01.02 on Methods of
NOTE 1—Correction for temperature variation need not be made, since
Test and Sampling Procedure.
the error introduced in the length measurement by the temperature
Current edition approved April 1, 2013. Published April 2013. DOI: 10.1520/
variation is less than the required accuracy of the length measurement.
B0986–13.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 7. Calculation
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1 Calculate the tensile strength of the stranded conductor
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. as follows (Explanatory Note 1):
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B986 − 13
A
TABLE 1 Material Factory, MF
Material Factor, MF,
Density, lb/in.
Metal lb/in. · 1000 ft
(g/cm )
(kg/mm · km)
Copper-Bare, Nickel coated copper 0.32117 (8.89) 3854 (8.89)
Copper-Silver coated Class A (1.25 %) 0.32179 (8.91) 3861 (8.91)
Copper-Silver coated Class B (2.50 %) 0.32241 (8.93) 3869 (8.93)
Copper-Silver coated Class C (4.00 %) 0.32315 (8.95) 3787 (8.95)
Copper-Silver coated Class D (6.10 %) 0.32420 (8.97) 3890 (8.97)
Copper-Silver coated Class E (10.0 %) 0.32617 (9.03) 3914 (9.03)
Copper-Clad Steel (CCS30) 0.29440 (8.15) 3533 (8.15)
Copper-Clad Steel (CCS40) 0.29750 (8.24) 3570 (8.24)
Aluminum 1350 0.09750 (2.70) 1170 (2.70)
Copper-Clad Aluminum (10A and 10H) 0.12000 (3.32) 1440 (3.32)
Copper-Clad Aluminum (15A and 15H) 0.13118 (3.63) 1574 (3.63)
Aluminum Alloy Series 8000 (per ASTM B800) 0.098000 (2.71) 1176 (2.71)
A
See Explanatory Note 4 and Note 5.
TS 5 BL⁄ CM 3 MF 3 100 1 k ⁄ 100 8. Precision and Bias
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