ASTM F219-96(2013)
(Test Method)Standard Test Methods of Testing Fine Round and Flat Wire for Electron Devices and Lamps
Standard Test Methods of Testing Fine Round and Flat Wire for Electron Devices and Lamps
ABSTRACT
These test methods cover the testing of fine wire, flat or round, approximately 0.010 in. (0.25 mm) and smaller in diameter or thickness, used in electronic devices and lamps. Chemical analysis of the material shall be made in accordance with the requirements prescribed. The procedures in determining the out-of-roundness, edgewise curvature of ribbon, and straightness of straightened round wire are presented in details. Tension test and electrical resistivity test shall be performed to meet the requirements prescribed.
SCOPE
1.1 These test methods cover the testing of fine wire, flat or round, approximately 0.010 in. (0.25 mm) and smaller in diameter or thickness, used in electronic devices and lamps.
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 whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: F219 − 96 (Reapproved 2013)
Standard Test Methods of Testing
Fine Round and Flat Wire for Electron Devices and Lamps
ThisstandardisissuedunderthefixeddesignationF219;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Section 4, where one specimen per shipment shall be submit-
ted. These specimens shall be selected sufficiently far from
1.1 These test methods cover the testing of fine wire, flat or
eitherendofthespoolofwiretobefreefromkinks,bends,and
round, approximately 0.010 in. (0.25 mm) and smaller in
distortion.Withtheexceptionsmentionedin3.2,thespecimens
diameter or thickness, used in electronic devices and lamps.
shallbetakenfrompointsinthelengthofthewireseparatedby
1.2 The values stated in inch-pound units are to be regarded
at least 1 ft (305 mm).
as standard. The values given in parentheses are mathematical
3.2 For the edgewise curvature test, straightness test, and
conversions to SI units that are provided for information only
tension tests the specimens shall be taken from points in the
and are not considered standard.
length of the wire separated by at least 3 ft (0.9 m).
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Chemical Analysis
responsibility of whoever uses this standard to consult and
establish appropriate safety and health practices and deter-
4.1 Incaseofdisagreementbetweenproducerandconsumer
mine the applicability of regulatory limitations prior to use. chemical analysis of the material shall be made in accordance
with the methods of the American Society for Testing and
2. Referenced Documents
Materials for the respective materials when such methods of
2.1 ASTM Standards: analysis are available. When ASTM test methods are not
available, the analytical procedures shall be agreed upon by the
B63 Test Method for Resistivity of Metallically Conducting
Resistance and Contact Materials producer and the consumer.
D374 Test Methods for Thickness of Solid Electrical Insu-
lation (Withdrawn 2013) 5. Dimensions
F16 Test Methods for Measuring Diameter or Thickness of
5.1 Procedure A for Round Wire—Determine the weight-
Wire and Ribbon for Electronic Devices and Lamps
size of round wire in accordance with Test Method F205.
F205 Test Method for Measuring Diameter of Fine Wire by
Weighing 5.2 ProcedureBforRoundWire—As an alternative method,
the diameter of wire over 0.005 in. (0.13 mm) may be
F289 Specification for Molybdenum Wire and Rod for
Electronic Applications determined in accordance with Test Methods D374.
5.3 Procedure for Flat Wire:
3. Test Specimens
5.3.1 Determine the dimensions of flat wire in accordance
3.1 The number of spools per shipment to be checked shall
with 5.1 in conjunction with width as measured in accordance
be agreed upon by the producer and consumer. Three test
with 5.2, or if agreed upon by the manufacturer and the
specimens from each spool to be tested shall be taken for the
purchaser, any dimension exceeding 0.005 in. may be deter-
purpose of each of the tests covered by these methods, except
mined in accordance with 5.2 alone.
5.3.2 In determining the width of flat wire, form a flatwise
These test methods are under the jurisdiction of ASTM Committee F01 on
loop loosely with the ends held between the fingers.The minor
Electronics and are the direct responsibility of Subcommittee F01.03 on Metallic
1 3
axis of the loop shall be ⁄2 to ⁄4 of the diameter of the
Materials.
micrometer jaws. Measure the width of the ribbon with the
Current edition approved May 1, 2013. Published May 2013. Originally
approved in 1947. Last previous edition approved in 2009 as F219 – 96 (2009). curve loop perpendicular to the micrometer jaws.Take care not
DOI: 10.1520/F0219-96R13.
to distort the ribbon or bend it out of the correct plane during
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
measurement.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
5.4 In case of disagreement between producer and
the ASTM website.
consumer, Test Methods F16 shall be used as the referee
The last approved version of this historical standard is referenced on
www.astm.org. method.
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F219 − 96 (2013)
5.5 Report—The report shall include the average weight of in terms of a constant rate of traverse shall be satisfactory. The
wire or ribbon in mg/200 mm to three significant figures. The capacity of the testing machine shall be such that all specimens
average measurements for diameter, width, or thickness shall fail at greater than 40 percent of the capacity of the machine.
be reported to the nearest 0.0001 in. (0.002 mm). The clamps used shall be such that there will be no slipping of,
or damage to, the test specimen.
6. Out-of-Roundness
9.2 Procedure—Determine the tensile strength, yield
6.1 Procedure—Measure out-of-roundness on round wire
strength, and elongation at room temperature. The gage length
over 0.005 in. (0.13 mm) in diameter in accordance with
of the specimen shall be 10 in. (254 mm). The initial load
Sections 3 and 4 of Test Methods D374. For wire 0.005 in. or
applied to the specimen before making the test shall be
less in diameter the same method shall apply except a bench
sufficient to keep the wire straight.The rate of traverse shall be
type micrometer reading to 0.0001 in. (0.002 mm) shall be
1 in./min (25.4 mm/min).The yield strength shall be defined as
used. Make the measurements by exploring a plane of cross
the stress at which the specimen exhibits an elongation of 1 %.
section of the test specimen to determine both minimum and
If the specimen breaks within 0.5 in. (12.7 mm) of the clamps,
maxi
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