ASTM F205-94(2010)e1
(Test Method)Standard Test Method for Measuring Diameter of Fine Wire by Weighing
Standard Test Method for Measuring Diameter of Fine Wire by Weighing
ABSTRACT
This test method establishes the apparatus 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
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
´1
Designation: F205 − 94(Reapproved 2010)
Standard Test Method for
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.
ε NOTE—This standard was converted to solely SI units editorially in December 2010.
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
2. Referenced Documents
operator’s hands shall be clean and dry.
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
3. Apparatus
less than half of the scale of the instrument, weigh a sufficient
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
4.1 Test specimens shall be selected at least 1 m from the
60.5%ofeithertheminimumorthemaximumlimitspecified
end of a spool or sufficiently far from the end to be free from
forthewireweight,cutandweightwomorespecimensofwire
kinks or other damage resulting in lack of straightness of the
in a similar manner. When two or more lengths of wire have
cut length.
beenweighedsimultaneouslytoproduceareadingintheupper
half of the scale because of the small size of the wire, cut and
This test method is under the jurisdiction of ASTM Committee F01 on
weigh two more sets of specimens in a similar manner.
Electronicsand is the direct responsibility of Subcommittee F01.03 on Metallic
Materials.
Current edition approved Dec. 1, 2010. Published January 2011. Originally 7. Calibration and Checking of the Balance
approved in 1945 as B205 – 45 T. Last previous edition approved in 2005 as F205
7.1 Check the balance regularly in accordance with the
– 94(2005). DOI: 10.1520/F0205-94R10E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or recommendations of the manufacturer.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.2 Ifavarietyofweightsaretobedetermined,calibratethe
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. balance at five major points on the scale and at zero by
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
´1
F205 − 94 (2010)
TABLE 1 Density and Constant K for Diameter Calculations
determining the weights of calibrated check weights. If any
A
point is in error by more than 1 %, remove the balance from Density, Constant
Alloy
g/cm
serviceandrepairit.Applycorrectionsdeterminedbychecking K
to the apparent readings to obtain corrected weights. Obtain Aluminum + 1 % magnesium 2.7 1.912
Aluminum + 1 % silicon 2.7 1.912
corrections applied to apparent weights by interpolation be-
Gold 19.32 0.715
tween the closest calibrated points, one above and one below
85 % nickel, 15 % chromium 8.47 1.079
the reading. 58 % nickel, 20 % molybdenum, 20 % 8.78 1.060
iron, 2 % manganese
7.3 If the amount of work to be weighed at one point on the
95 % nickel, 5 % manganese 8.74 1.063
Permanickel 8.77 1.061
scale justifies it, the balance may be calibrated with a standard
Monel 8.81 1.058
weight(orcombinationofweights)deviatingbynotmorethan
Molybdenum 10.14 0.986
10% from that of the weight to be determined. In this case,
Tantalum 16.59 0.771
Tungsten 19.17 0.717
adjust the balance so that the balance reads the known weight
A
of the check weight correctly when it is in balance, thereby The density values in this table have been determined by ASTM Test Method
F180.
reducing the correction to zero.
7.4 Calibrate the balance, at zero under no load, or at
11. Interpretation of Results
positive values when loaded to check weights, by using the
average of three consecutive readings, taken under conditions
11.1 If a single specimen or a single set of specimens is
specified in 7.2 or 7.3, whichever is applicable.
weighed, and its corrected weight, or average weight when
multiple specimens are used, is found to lie between the point
8. Calibration with Standard Weights
0.5%abovetheminimumlimitand0.5%belowthemaximum
8.1 Check weights are subject to change of mass due to limit, the wire shall be considered to meet the specified limits.
wear from handling and use, and from chemical action result-
11.2 If the corrected wire weight is under 0.5% b
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.