ASTM B965-09(2018)
(Specification)Standard Specification for High Performance Tin-Coated Annealed Copper Wire Intended for Electrical and Electronic Application for Solderability
Standard Specification for High Performance Tin-Coated Annealed Copper Wire Intended for Electrical and Electronic Application for Solderability
ABSTRACT
This specification covers tin-coated annealed copper wire intended for electrical and electronic applications where solderability is a requirement. The tin shall be electroplated for the coating and shall be commercially pure. The base metal shall be copper of such quality and purity that the finished product shall have properties and characteristics prescribed. Tensile strength and elongation, resistivity, dimensional measurements, continuity of coating, thickness of coating, and solderability test methods shall be performed to conform to the requirements specified.
SCOPE
1.1 This specification covers tin-coated annealed copper wire intended for electrical and electronic applications where solderability is a requirement.
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.
1.2.1 Exceptions—The SI values for density, resistivity, and volume are to be regarded as 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B965 −09 (Reapproved 2018)
Standard Specification for
High Performance Tin-Coated Annealed Copper Wire
Intended for Electrical and Electronic Application for
Solderability
This standard is issued under the fixed designation B965; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 Other Standards:
IPC/ECA J-STD-002 Solderability Test for Component
1.1 This specification covers tin-coated annealed copper
Leads, Lugs, Terminals and Wires
wire intended for electrical and electronic applications where
NBS Handbook 100—Copper Wire Tables
solderability is a requirement.
1.2 Thevaluesstatedininch-poundunitsaretoberegarded
3. Ordering Information
as standard. The values given in parentheses are mathematical
3.1 Ordersformaterialunderthisspecificationshallinclude
conversions to SI units that are provided for information only
the following information:
and are not considered standard.
3.1.1 Quantity of each size,
1.2.1 Exceptions—The SI values for density, resistivity, and
3.1.2 Wire size-diameter in inches (see 5.3 and Table 1),
volume are to be regarded as standard.
3.1.3 Type of copper, if special (see 4.2),
1.3 This standard does not purport to address all of the
3.1.4 Package size (see 10.1),
safety concerns, if any, associated with its use. It is the
3.1.5 Special packaging marking, if required, and
responsibility of the user of this standard to establish appro-
3.1.6 Place of inspection (see 7.1).
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4. Material
1.4 This international standard was developed in accor-
4.1 Tin for Coating—The tin shall be electroplated for the
dance with internationally recognized principles on standard-
coating and shall be commercially pure (Explanatory Note 1).
ization established in the Decision on Principles for the
For purposes of this specification, the tin shall be considered
Development of International Standards, Guides and Recom-
commercially pure if the total of other elements, exclusive of
mendations issued by the World Trade Organization Technical
copper, does not exceed 1%. Not withstanding the previous
Barriers to Trade (TBT) Committee.
sentence,chemicalanalysisofthetincoatingorofthetinused
for coating shall not be required under this specification.
2. Referenced Documents
4.2 Copper-Base Metal—The base metal shall be copper of
2.1 ASTM Standards:
such quality and purity that the finished product shall have
B49Specification for Copper Rod for Electrical Purposes
properties and characteristics prescribed in this specification.
B193Test Method for Resistivity of Electrical Conductor
NOTE 1—Specification B49 defines copper suitable for use.
Materials
B258Specification for Standard Nominal Diameters and
5. General Requirements (See Section 8)
Cross-Sectional Areas of AWG Sizes of Solid Round
5.1 Tensile Strength and Elongation (Explanatory Note
Wires Used as Electrical Conductors
4)—The tinned wire shall conform to the requirements for
elongation prescribed in Table 1. No requirements for tensile
strength are specified. For wire whose nominal diameter is
This specification is under the jurisdiction of ASTM Committee B01 on
more than 0.001 in. (0.025 mm) greater than a size listed in
Electrical Conductors and is the direct responsibility of Subcommittee B01.04 on
Conductors of Copper and Copper Alloys.
Current edition approved Oct. 1, 2018. Published October 2018. Originally
approved in 2009. Last previous edition approved in 2014 as B965 – 09 (2014).
DOI: 10.1520/B0965-09R18. AvailablefromIPC,3000LakesideDrive,Suite309S,Bannockburn,IL60015,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or http://www.ipc.org, and ECA 2500 Wilson Blvd., Arlington, VA 22201, http://
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM www.ec-central.org.
Standards volume information, refer to the standard’s Document Summary page on Available from National Technical Information Service (NTIS), 5285 Port
the ASTM website. 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
B965−09 (2018)
TABLE 1 Tensile Requirements
5.4 Continuity of Coating—Thetincoatingshallbecontinu-
Diameter Area at 20°C Elongation ous. The continuity of coating on the wire shall be determined
in
2 2
in. mm cmil in. mm on representative samples taken before stranding or insulating.
10 in. (250
The continuity of tinning shall be determined by the hydro-
mm),
%min chloric acid-sodium polysulfide test in accordance with 6.4.
0.4600 11.684 211 600 0.1662 107.0 30
5.5 Thickness of Coating—The wire shall have adequate
0.4096 10.404 167 800 0.1318 85.0 30
0.3648 9.266 133 100 0.1045 67.4 30 free tin (Explanatory Note 1) to insure meeting solderability
0.3249 8.252 105 600 0.08291 53.5 30
requirements as prescribed in 5.8. The thickness of coating
shall be at the manufacturer’s discretion or as agreed upon
0.2893 7.348 83 690 0.06573 42.4 25
between the manufacturer and purchaser to insure compliance
0.2576 6.543 66 360 0.05212 33.6 25
0.2294 5.827 52 620 0.04133 26.7 25
to 5.8 and further processing for solderability performance
0.2043 5.189 41 740 0.03278 21.2 25
after insulation.
0.1819 4.620 33 090 0.02599 16.8 25
5.6 Adherence of Coating—The tin coating shall be firmly
0.1620 4.115 26 240 0.02061 13.3 25
adherenttothesurfaceofthecopper.Theadherenceofcoating
0.1443 3.665 20 820 0.01635 10.5 25
0.1285 3.264 16 510 0.01297 8.37 25
on the wire shall be determined on representative samples
taken after electroplating and prior to final drawing. The
0.1144 2.906 13 090 0.01028 6.63 25
adherence of coating shall be determined by the wrapping test
0.1019 2.588 10 380 0.008155 5.26 20
0.0907 2.304 8 230 0.00646 4.17 20
in accordance with 6.6.
0.0808 2.052 6 530 0.00513 3.31 20
5.7 Joints—Necessary joints in the completed wire and in
0.0720 1.829 5 180 0.00407 2.63 20
the wire and rods prior to final drawing shall be made in
0.0641 1.628 4 110 0.00323 2.08 20
accordance with the best commercial practice.
0.0571 1.450 3 260 0.00256 1.65 20
0.0508 1.290 2 580 0.00203 1.31 20
5.8 Solderability—The solder must cover greater than 95 %
0.0453 1.151 2 050 0.00161 1.04 20 of the surface of the specimen and show evidence of good
0.0403 1.024 1 620 0.00128 0.823 20
wetting and of bonding. The solderability shall be tested in
0.0359 0.912 1 290 0.00101 0.654 20
accordance with 6.7.
0.0320 0.813 1 020 0.000804 0.517 20
5.9 Finish—The coating shall consist of a smooth continu-
0.0285 0.724 812 0.000638 0.411 20
ouslayer,firmlyadherenttothesurfaceofthecopper.Thewire
0.0253 0.643 640 0.000503 0.324 20
0.0226 0.574 511 0.000401 0.259 20
shall be free of all imperfections not consistent with the best
0.0201 0.511 404 0.000317 0.205 15
commercial practice.
0.0179 0.455 320 0.000252 0.162 15
0.0159 0.404 253 0.000199 0.128 15
6. Test Methods
0.0142 0.361 202 0.000158 0.102 15
0.0126 0.320 159 0.000125 0.081 15 6.1 Tensile Strength and Elongation (Explanatory Note 4):
6.1.1 No test for tensile strength shall be required.
0.0113 0.287 128 0.000100 0.065 15
6.1.2 The elongation of wire with a nominal diameter
0.0100 0.254 100 0.0000785 0.051 10
0.0089 0.226 79.2 0.0000622 0.040 10
greater than 0.0808 in. (2.052 mm) shall be determined as the
0.0080 0.203 64.0 0.0000503 0.032 10
permanent increase in length due to the breaking of the wire in
tension.Theelongationshallbemeasuredbetweengagemarks
0.0071 0.180 50.4 0.0000396 0.026 10
0.0063 0.160 39.7 0.0000312 0.020 10
placedoriginally10in.(242mm)apartuponthetestspecimen
0.0056 0.142 31.4 0.0000246 0.016 10
and expressed in percent of the original length.
0.0050 0.127 25.0 0.0000196 0.013 10
6.1.3 The elongation of wire with a nominal diameter equal
0.0045 0.114 20.2 0.0000159 0.010 10
to or less than 0.0808 in. (2.053 mm) may be determined as
0.0040 0.102 16.0 0.0000126 0.0081 10
describedaboveorbymeasurementsmadebetweenthejawsof
0.0035 0.089 12.2 0.00000962 0.0062 10
0.0031 0.079 9.61 0.00000755 0.0049 10 the testing machine. When measurements are made between
thejaws,thezerolengthshallbethedistancebetweenthejaws
at the start of the tension test and be as near 10 in. (254 mm)
Table 1, but less than that of the next larger size, the
as practicable. The final length shall be the distance between
requirements of the next larger size shall apply.
the jaws at the time of rupture. The fracture shall be between
5.2 Resistivity (Explanatory Note 1 and Note 3)—The elec- gage marks or jaws of the testing machine, depending on
trical resistivity of tinned wire at a temperature of 20°C shall methodused,andnotcloserthan1in.(25.4mm)toeithergage
not exceed the values prescribed in Table 2. mark or jaw.
5.3 Dimensions and Permissible Variations (Explanatory 6.2 Resistivity (Explanatory Note 3)—The electrical resis-
Note 2)—The wire sizes shall be expressed as the diameter of tivity of the material shall be determined in accordance with
thewireindecimalfractionsofaninchtothenearest0.0001in. TestMethodB193.Thepurchasermayacceptcertificationthat
(0.0025 mm). The tin-coated wire shall not vary from the the wire was drawn from rod stock meeting the international
specified diameter by more than the amounts prescribed in standard for annealed copper instead of resistivity tests on the
Table 3. finished wire.
B965−09 (2018)
TABLE 2 Electrical Resistivity Requirements
Nominal Diameter Resistivity at 20°C
2 2
in. mm Ω·lb/mile Ω·g/m
0.460 to 0.290, incl 11.7 to 7.4, incl 896.15 0.15695
Under 0.290 to 0.103, incl Under 7.4 to 2.6, incl 900.77 0.15776
Under 0.103 to 0.0201, incl Under 2.6 to 0.51, incl 910.15 0.15940
Under 0.0201 to 0.0111, incl Under 0.51 to 0.28, incl 929.52 0.16279
Under 0.0111 to 0.0030, incl Under 0.28 to 0.076, incl 939.51 0.16454
TABLE 3 Permissible Variations in Diameter
Nominal Diameter of Wire Permissible Variations in Diameter
in. mm
in. mm plus minus plus minus
Under Under 0.0003 0.00010 0.0076 0.0025
0.0100 0.25
0.0100 0.25 and 3% 1% 3% 1%
and over over
6.3 Dimensional Measurements—Dimensional measure- immersed in it for two cycles.
ments shall be made with a micrometer caliper equipped with
6.4.3.2 Sodium Polysulfide Solution (sp gr 1.142) (Explana-
a vernier graduated in 0.0001 in. (0.0025 mm). Measurements
tory Note 6)—A concentrated solution shall be made by
shall be made on at least three places on each unit selected for
dissolving sodium sulfide crystals (cp) in distilled water until
thistest.Ifaccessible,onemeasurementshallbetakenoneach
the solution is saturated at about 21°C (70°F), and adding
end and one near the middle. The average of the three
sufficientflowersofsulfur(inexcessof250g/Lofsolution)to
measurements shall determine compliance with the require-
provide complete saturation, as shown by the presence in the
ments.
solution of an excess of sulfur after the solution has been
allowed to stand for at least 24 h. The test solution shall be
6.4 Continuity of Coating:
made by diluting a portion of the concentrated solution with
6.4.1 Length of Specimens—Test specimens shall have a
distilled water to a specific gravity of 1.135 to 1.145 at 15.6°C
lengthofabout6in.(152mm).Theyshallbetaggedormarked
(60°F). The sodium polysulfide test solution should have
tocorrespondwiththecoil,spool,orreelfromwhichtheywere
sufficient strength to blacken thoroughly a piece of clean
cut.
untinned copper wire in 5 s. The test solution used for testing
6.4.2 Treatment of Specimens—The specimens shall be
samples shall be considered exhausted if it fails to blacken a
thoroughly cleaned by immersion in a suitable organic solvent
piece of clean copper as described above.
for at least 3 min; then removed and wiped dry with a clean,
6.4.4 Procedure:
soft cloth (Caution—see Explanatory Note 5). The specimens
thus cleaned shall be kept wrapped in a clean, dry cloth until 6.4.4.1 Immersion of Specimens—Immerse a length of at
tested. That part of the specimen to be immersed in the test least 4-1/2 in. (114 mm) from each of the clean specimens, in
solution shall not be handled. Care shall be taken to avoid
accordance with the following cycles, in test solutions main-
abrasion by the cut ends. tained at a temperature between 15.6 and 21°C (60 and 70°F):
6.4.3 Special Solutions Required:
(1) Immerse the specimen for 1 min in the HCl solution
6.4.3.1 Hydrochloric Acid Solution (HCl) (sp gr 1.088) described in 6.4.2, wash, and wipe dry; (2) immerse the
—Commercial HCl (sp gr 1.12) shall be diluted with distilled specimen for 30 s in the sodium polysulfide solution described
watertoaspecificgravityof1.088measuredat15.6°C(60°F). in 6.4.2, wash, and wipe dry; (3) immerse the specimen for 1
Aportion of HCl solution having a volume of 180 mLshall be min in the HCl solution, wash, and dry; (4) immerse the
consideredtobeexhaustedwhenthenumberoftestspecimens specimenfor30sinthesodiumpolysulfidesolution,wash,and
prescribed in Table 4 of a size as indicated in 6.4.3 have been wipe dry.
TABLE 4 Limiting Number of Test Specimens for Coating Tests
Maximum Number of Specimens to be
Nominal Diameter Tested for 2 Cycles
in 180 mL of Acid Solution
in. mm
0.460 to 0.141, incl 11.7 to 3.6, incl 2
Under 0.141 to 0.0851, incl Under 3.6 to 2.2, incl 4
Under 0.0851 to 0.0501, incl Under 2.2 to 1.3, incl 6
Under 0.0501 to 0.0381, incl Under 1.3 to 0.97, incl 10
Under 0.0381 to 0.0301, incl Under 0.97 to 0.76, incl 12
Under 0.0301 to 0.0030, incl Under 0.76 to 0.076, incl 14
B965−09 (2018)
6.4.4.2 Washing Specimens—After each immersion, imme- be responsible for the performance of all inspection and test
diatelywashthespecimensthoroughlyincleanwaterandwipe requirements specified.
dry with a clean, soft cloth.
7.1.1 All inspections and tests shall be made at the place of
6.4.4.3 Examination of Specimens—After immersion and
manufacture unless otherwise especially agreed upon between
washing,examinethespecimenstoascertainifcopperexposed
the manufacturer and the purchaser at the time of purchase.
through openings in the tin coating has been blackened by
7.1.2 The manufacturer shall afford the inspector represent-
action of the sodium polysulfide. The specimens shall be
ing the purchaser all r
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