ASTM B964-09

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: B964 − 09
StandardTest Methods for
Flow Rate of Metal Powders Using the Carney Funnel
This standard is issued under the fixed designation B964; 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. Scope 3.2.1 Carney flow rate (FR ), n—the time required for a
C
metal powder sample of specified mass to flow through the
1.1 These test methods cover the determination of a flow
orifice in a Carney funnel according to a specified procedure.
rate,byuseoftheCarneyfunnel,ofmetalpowdersandpowder
mixtures that do not readily flow through the Hall funnel of
3.3 3 Additional descriptive information is available in the
Test Method B213.
Related Materials section of Vol 02.05 of the Annual Book of
ASTM Standards.
1.2 This is a non-destructive quantitative test performed in
the laboratory.
4. Summary of Test Methods
1.3 The values stated in SI units are to be regarded as
4.1 A weighed mass of metal powder is timed as it flows
standard. The values stated in parentheses are for information
through the orifice of a Carney funnel.
only, converted according to IEEE/ASTM Standard SI 10.
1.4 This standard does not purport to address all of the
5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 The rate and uniformity of die cavity filling are related
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- to flow properties, which thus influence production rates and
uniformity of compacted parts.
bility of regulatory limitations prior to use.
5.2 The ability of a powder to flow is a function of
2. Referenced Documents
interparticle friction.As interparticle friction increases, flow is
2.1 ASTM Standards:
slowed. Some powders, often fine powders and lubricated
B213 Test Methods for Flow Rate of Metal Powders Using
powder mixtures, may not flow through the Hall funnel ofTest
the Hall Flowmeter Funnel
Method B213. Nevertheless, if a larger orifice is provided,
B215 Practices for Sampling Metal Powders
such as in the Carney funnel, a meaningful flow rate may be
B243 Terminology of Powder Metallurgy
determined, providing specific information for certain applica-
B855 Test Method for Volumetric Flow Rate of Metal
tions.
Powders Using the Arnold Meter and Hall Flowmeter
5.3 Test Method B213., using the Hall funnel, is the
Funnel
preferred method for determining the flowability of metal
2.2 IEEE/ASTM Standard:
powders. The Carney funnel of these test methods should only
SI 10 American National Standard for Use of the Interna-
be used when a powder will not flow through the Hall funnel.
tional System of Units (SI): The Modern Metric System
These test methods may also be used for comparison of several
powders when some flow through the Hall funnel and some do
3. Terminology
not.
3.1 Definitions of powder metallurgy (PM) terms can be
5.4 Humidity and moisture content influence flow rate. Wet
found in Terminology B243.
or moist powders may not flow through either the Hall or the
3.2 Definitions of Terms Specific to This Standard:
Carney funnel.
5.5 These test methods are based on flow of a specific mass
of powder. If flow of a specific volume of powder is preferred,
These test methods are under the jurisdiction of ASTM Committee B09 on
Metal Powders and Metal Powder Products and are the direct responsibility of
Test Method B855 may be used for powders that flow readily
Subcommittee B09.02 on Base Metal Powders.
through the Hall funnel.
Current edition approved April 1, 2009. Published June 2009. DOI: 10.1520/
B0964-09.
5.6 These test methods may be part of the purchase agree-
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ment between powder suppliers and powder metallurgy (PM)
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
part producers, or it can be an internal quality control test by
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. either the supplier or the end user.
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B964 − 09
6. Apparatus 9. Calibration of Apparatus
6.1 Carney Powder Flowmeter Funnel —A flowmeter fun- 9.1 Plans are under way for developing a reference material
nel (Fig. 1) having an orifice of 5.08 6 0.13 mm (0.200 6 that can be used to calibrate the Carney powder flowmeter
0.005 in.) in diameter. funnel, similar to the material used for calibration of the Hall
3 powder flowmeter funnel in Test Method B213.
6.2 Stand —A stand (Fig. 1) to support the powder
flowmeter funnel. 9.2 In the absence of such a reference material, it is
recommended that the dimensions of the Carney powder
6.3 Base—A level, vibration-free base to support the pow-
flowmeter funnel be checked periodically, at least every six
der flowmeter stand.
months. If the dimensions are no longer within the specified
6.4 Timing Device—A stopwatch or other suitable timing
tolerances, replace the flowmeter funnel.
device capable of measuring to the nearest 0.1 s.
6.5 Balance—Having a capacity of at least 250 g and a 10. Procedure
sensitivity of 0.01 g.
10.1 Method 1—Stationary Powder Start to Flow Measure-
6.6 Weighing Dish—An ordinary laboratory weighing dish ment:
(pan),capableofcontainingthefullmassoftestedpowder,and 1
...