ASTM F205-94(2015)

Standard Test Method for Measuring Diameter of Fine Wire by Weighing

ABSTRACT
This test method establishes the apparatuses required, specimen preparation steps, and standard procedures and calculations involved in the measurement of the average diameter of fine wires by means of weighing a known length. This applies particularly to wires of specified sizes used in electron devices and lamps.
SCOPE
1.1 This test method covers the measurement of the average diameter of fine wire by weighing a known length; it applies particularly to sizes up to 0.13 mm used in electron devices and lamps.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.

General Information

• Status: Historical
• Publication Date: 30-Jun-2015
• ICS: 29.060.10 - Wires
• Technical Committee: F01 - Electronics
• Drafting Committee: F01.03 - Metallic Materials, Wire Bonding, and Flip Chip

Relations

• Replaces: ASTM F205-94(2010)e1 - Standard Test Method for Measuring Diameter of Fine Wire by Weighing
• Effective Date: 01-Jul-2015
• Replaced By: ASTM F205-94(2020) - Standard Test Method for Measuring Diameter of Fine Wire by Weighing (Withdrawn 2023)
• Effective Date: 01-May-2020
• Referred By: ASTM B682-01(2016) - Standard Specification for Standard Metric Sizes of Electrical Conductors
• Effective Date: 01-Jul-2015
• Referred By: ASTM F219-96(2018) - Standard Test Methods of Testing Fine Round and Flat Wire for Electron Devices and Lamps (Withdrawn 2023)
• Effective Date: 01-Jul-2015
• Referred By: ASTM F288-96(2019) - Standard Specification for Tungsten Wire for Electron Devices and Lamps
• Effective Date: 01-Jul-2015
• Referred By: ASTM F72-21 - Standard Specification for Gold Wire for Semiconductor Lead Bonding
• Effective Date: 01-Jul-2015
• Referred By: ASTM F290-94(2020) - Standard Specification for Round Wire for Winding Electron Tube Grid Laterals
• Effective Date: 01-Jul-2015
• Referred By: ASTM B258-18 - Standard Specification for Standard Nominal Diameters and Cross-Sectional Areas of AWG Sizes of Solid Round Wires Used as Electrical Conductors
• Effective Date: 01-Jul-2015
• Referred By: ASTM F289-96(2019) - Standard Specification for Molybdenum Wire and Rod for Electronic Applications
• Effective Date: 01-Jul-2015
• Referred By: ASTM F73-96(2017) - Standard Specification for Tungsten-Rhenium Alloy Wire for Electron Devices and Lamps
• Effective Date: 01-Jul-2015

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F205 − 94 (Reapproved 2015)
Standard Test Method for
1
Measuring Diameter of Fine Wire by Weighing
ThisstandardisissuedunderthefixeddesignationF205;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginal
adoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscript
epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 4.2 The wire shall be drawn from the spool under a low
even tension so that no elongation of the wire takes place.
1.1 Thistestmethodcoversthemeasurementoftheaverage
diameter of fine wire by weighing a known length; it applies 4.3 Each test specimen shall be cut to a length of 200 6 0.1
particularlytosizesupto0.13mmusedinelectrondevicesand mm. To prevent stretching, care shall be taken so that the
lamps. tension is just sufficient to eliminate the sag and curl. Any
disagreement concerning the amount of tension to be used in
1.2 The values stated in SI units are to be regarded as
cutting shall be resolved between the manufacturer and the
standard. No other units of measurement are included in this
purchaser.
standard.
4.4 The test specimen shall be folded upon itself several
1.3 This standard does not purport to address all of the
times and twisted to make a compact bundle with loop
safety concerns, if any, associated with its use. It is the
consisting of a single strand for hanging it on the balance
responsibility of the user of this standard to establish appro-
beam.Inthecaseofmultiplespecimens,allspecimensshallbe
priate safety and health practices and determine the applica-
twisted together and hung by a loop consisting of a single
bility of regulatory limitations prior to use.
strand.The specimen shall be handled as little as possible.The
operator’s hands shall be clean and dry.
2. Referenced Documents
2
2.1 ASTM Standards:
5. Number of Specimens
F180TestMethodforDensityofFineWireandRibbonWire
5.1 Weigh a single specimen if its weight lies within the
for Electronic Devices
upper half of the scale of the instrument. When the weight is
less than half of the scale of the instrument, weigh a sufficient
3. Apparatus
number of specimens, 200 mm in length, simultaneously so
3.1 The apparatus shall consist of a suitable torsion or other
that the total weight will register in the upper half of the scale,
direct-readingbalancecapableofreadingto0.002mgor0.1%
preferably as close to the limit of the balance as possible. Use
of the weight to be weighed (whichever is larger), with an
the lowest range instrument compatible with the weight of the
accuracyof0.004mgor0.2%(whicheverislarger).Therange
200-mm weight specimen to reduce the number of 200-mm
of the balance (or the size of the specimen) shall be such that
lengths that must be weighed together.
the reading will lie within the upper half of the scale.
6. Repetition of Weighing
4. Test Specimens
6.1 If the corrected weight of a single specimen lies within
60.5%ofeithertheminimumorthemaximumlimitspecified
4.1 Test specimens shall be selected at least 1 m from the
forthewireweight,cutandweightwomorespecimensofwire
end of a spool or sufficiently far from the end to be free from
in a similar manner. When two or more lengths of wire have
kinks or other damage resulting in lack of straightness of the
beenweighedsimultaneouslytoproduceareadingintheupper
cut length.
half of the scale because of the small size of the wire, cut and
weigh two more sets of specimens in a similar manner.
1
This test method is under the jurisdiction of ASTM Committee F01 on
7. Calibration and Checking of the Balance
Electronicsand is the direct responsibility of Subcommittee F01.03 on Metallic
Materials, Wire Bonding, and Flip Chip.
7.1 Check the balance regularly in accordance with the
Current edition approved July 1, 2015. Published September 2015. Originally
recommendations of the manufacturer.
approved in 1945 as B205 – 45 T. Last previous edition approved in 2010 as F205
– 94(2010). DOI: 10.1520/F0205-94R15.
7.2 Ifavarietyofweightsaretobedetermined,calibratethe
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
balance at five major points on the scale and at zero by
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
determining the weights of calibrated check weights. If any
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. point is in error by more than 1 %, remove the balance from
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F205 − 94 (2015)
TABLE 1 Density and Constant K for Diameter Calculations
serviceandrepairit.Applycorrectionsdeterminedbychecking
A
to the apparent readings t
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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.
´1
Designation: F205 − 94 (Reapproved 2010) F205 − 94 (Reapproved 2015)
Standard Test Method for
1
Measuring Diameter of Fine Wire by Weighing
This standard is issued under the fixed designation F205; 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.
1
ε NOTE—This standard was converted to solely SI units editorially in December 2010.
1. Scope
1.1 This test method covers the measurement of the average diameter of fine wire by weighing a known length; it applies
particularly to sizes up to 0.13 mm used in electron devices and lamps.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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.
2. Referenced Documents
2
2.1 ASTM Standards:
F180 Test Method for Density of Fine Wire and Ribbon Wire for Electronic Devices
3. Apparatus
3.1 The apparatus shall consist of a suitable torsion or other direct-reading balance capable of reading to 0.002 mg or 0.1 %
of the weight to be weighed (whichever is larger), with an accuracy of 0.004 mg or 0.2 % (whichever is larger). The range of the
balance (or the size of the specimen) shall be such that the reading will lie within the upper half of the scale.
4. Test Specimens
4.1 Test specimens shall be selected at least 1 m from the end of a spool or sufficiently far from the end to be free from kinks
or other damage resulting in lack of straightness of the cut length.
4.2 The wire shall be drawn from the spool under a low even tension so that no elongation of the wire takes place.
4.3 Each test specimen shall be cut to a length of 200 6 0.1 mm. To prevent stretching, care shall be taken so that the tension
is just sufficient to eliminate the sag and curl. Any disagreement concerning the amount of tension to be used in cutting shall be
resolved between the manufacturer and the purchaser.
4.4 The test specimen shall be folded upon itself several times and twisted to make a compact bundle with loop consisting of
a single strand for hanging it on the balance beam. In the case of multiple specimens, all specimens shall be twisted together and
hung by a loop consisting of a single strand. The specimen shall be handled as little as possible. The operator’s hands shall be clean
and dry.
5. Number of Specimens
5.1 Weigh a single specimen if its weight lies within the upper half of the scale of the instrument. When the weight is less than
half of the scale of the instrument, weigh a sufficient number of specimens, 200 mm in length, simultaneously so that the total
weight will register in the upper half of the scale, preferably as close to the limit of the balance as possible. Use the lowest range
instrument compatible with the weight of the 200-mm weight specimen to reduce the number of 200-mm lengths that must be
weighed together.
1
This test method is under the jurisdiction of ASTM Committee F01 on Electronicsand is the direct responsibility of Subcommittee F01.03 on Metallic MaterialsMaterials,
Wire Bonding, and Flip Chip.
Current edition approved Dec. 1, 2010July 1, 2015. Published January 2011September 2015. Originally approved in 1945 as B205 – 45 T. Last previous edition approved
in 20052010 as F205 – 94(2005).94(2010). DOI: 10.1520/F0205-94R10E01.10.1520/F0205-94R15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F205 − 94 (2015)
6. Repetition of Weighing
6.1 If the corrected weight of a single specimen lies within 60.5 % of either the minimum or the maximum limit specified for
the wire weight, cut and weigh two more specimens of wire in a similar manner. When two or more lengths of wire have been
weighed simultaneously to produce a reading in the upper half of the scale because of t
...