ASTM B855-17
(Test Method)Standard Test Method for Volumetric Flow Rate of Metal Powders Using the Arnold Meter and Hall Flowmeter Funnel
Standard Test Method for Volumetric Flow Rate of Metal Powders Using the Arnold Meter and Hall Flowmeter Funnel
SIGNIFICANCE AND USE
5.1 The volumetric flow rate is a measure of the flow characteristics of a metal powder. Measuring flow by volume as compared with flow per unit mass eliminates the variable of the powder density and relates to the production practice of die filling by volume.
5.2 The ability of a powder to flow and pack is a function of interparticle friction. As the surface area increases, the amount of friction in a powder mass also increases. Consequently, the friction between particles increases, giving less efficient flow and packing.
5.3 Knowledge of the volumetric flow rate permits the part producer to estimate the number of parts that can be compacted per hour.
5.4 This test may be part of the purchase agreement between metal powder manufacturers and powder metallurgy (PM) part producers, or it can be an internal quality control test for any company using metal powders.
SCOPE
1.1 This test method covers a laboratory procedure for the quantitative determination of the flow rate of a specific volume of a free-flowing metal powder or lubricated powder mixture.
1.2 With the exception of the values for mass, volume and density, for which the use of the gram and the cubic centimetre unit is long-standing industry practice, the values stated in inch-pound units are to be regarded as standard. The values given in parenthesis 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 the user of this standard to establish appropriate safety and health 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
Buy Standard
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: B855 − 17
Standard Test Method for
Volumetric Flow Rate of Metal Powders Using the Arnold
1
Meter and Hall Flowmeter Funnel
This standard is issued under the fixed designation B855; 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.
3
1. Scope* 2.2 MPIF Standard
MPIF Standard 48 Determination of Apparent Density of
1.1 This test method covers a laboratory procedure for the
Metal Powders using the Arnold Meter
quantitative determination of the flow rate of a specific volume
of a free-flowing metal powder or lubricated powder mixture.
3. Terminology
1.2 With the exception of the values for mass, volume and
3.1 Definitions—Useful definitions of terms for metal pow-
density, for which the use of the gram and the cubic centimetre
ders and powder metallurgy used in this standard are found in
unit is long-standing industry practice, the values stated in
Terminology B243. Additional descriptive PM information is
inch-pound units are to be regarded as standard. The values
available in the Related Material section of Vol 02.05 of the
given in parenthesis are mathematical conversions to SI units
Annual Book of ASTM Standards.
that are provided for information only and are not considered
3.2 Definitions of Terms Specific to This Standard:
standard.
3.2.1 volumetric flow rate—the relation between time and
1.3 This standard does not purport to address all of the
volume of a free-flowing metal powder determined by mea-
safety concerns, if any, associated with its use. It is the
suringthetimeforaspecificvolumetoflowthroughtheorifice
responsibility of the user of this standard to establish appro-
in a Hall Flowmeter Funnel and expressing the ratio in seconds
priate safety and health practices and determine the applica-
3
per 20 cubic centimetres. (s/20 cm ).
bility of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
4. Summary of Test Method
dance with internationally recognized principles on standard-
3
4.1 A20 cm test portion of powder is prepared from the lot
ization established in the Decision on Principles for the
to be tested following the procedures in Test Methods B215
Development of International Standards, Guides and Recom-
and B703.
mendations issued by the World Trade Organization Technical
3
4.2 This 20 cm test portion is timed as it flows through the
Barriers to Trade (TBT) Committee.
orifice in a Hall Flowmeter Funnel following the procedure in
2. Referenced Documents
Test Method B213.
2
2.1 ASTM Standards:
4.3 The volumetric flow rate is calculated and reported in
3
B213 Test Methods for Flow Rate of Metal Powders Using
seconds per 20 cubic centimetres. (s/20 cm )
the Hall Flowmeter Funnel
5. Significance and Use
B215 Practices for Sampling Metal Powders
B243 Terminology of Powder Metallurgy
5.1 The volumetric flow rate is a measure of the flow
B703 Test Method for Apparent Density of Metal Powders
characteristics of a metal powder. Measuring flow by volume
and Related Compounds Using the Arnold Meter
as compared with flow per unit mass eliminates the variable of
E456 Terminology Relating to Quality and Statistics
the powder density and relates to the production practice of die
filling by volume.
1 5.2 The ability of a powder to flow and pack is a function of
This test method is under the jurisdiction of ASTM Committee B09 on Metal
Powders and Metal Powder Products and is the direct responsibility of Subcom- interparticle friction.As the surface area increases, the amount
mittee B09.02 on Base Metal Powders.
of friction in a powder mass also increases. Consequently, the
Current edition approved April 1, 2017. Published April 2017. Originally
friction between particles increases, giving less efficient flow
approved in 1994. Last previous edition approved in 2011 as B855 – 11. DOI:
and packing.
10.1520/B0855-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from ASTM or Metal Powder Industries Federation, 105 College
the ASTM website. Road East, Princeton, NJ 08540 and initially reported in MPIF Standard 48
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B855 − 17
5.3 Knowledge of the volumetric flow rate permits the part powder to flow through the funnel following either of the
producertoest
...
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.
Designation: B855 − 11 B855 − 17
Standard Test Method for
Volumetric Flow Rate of Metal Powders Using the Arnold
1
Meter and Hall Flowmeter Funnel
This standard is issued under the fixed designation B855; 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*
1.1 This test method covers a laboratory procedure for the quantitative determination of the flow rate of a specific volume of
a free-flowing metal powder or lubricated powder mixture.
1.2 With the exceceptionexception of the values for mass, volume and density, for which the use of the gram and the cubic
centimetercentimetre unit is long-standing industry practice, the values stated in inch-pound units are to be regarded as standard.
The values given in parenthesis 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 the user of this standard to establish appropriate safety and health 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B213 Test Methods for Flow Rate of Metal Powders Using the Hall Flowmeter Funnel
B215 Practices for Sampling Metal Powders
B243 Terminology of Powder Metallurgy
B703 Test Method for Apparent Density of Metal Powders and Related Compounds Using the Arnold Meter
E456 Terminology Relating to Quality and Statistics
3
2.2 MPIF Standard
MPIF Standard 48 Determination of Apparent Density of Metal Powders using the Arnold Meter
3. Terminology
3.1 Definitions—Useful definitions of terms for metal powders and powder metallurgy used in this standard are found in
Terminology B243. Additional descriptive PM information is available in the Related Material section of Vol 02.05 of the Annual
Book of ASTM Standards.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 volumetric flow rate—the relation between time and volume of a free-flowing metal powder determined by measuring the
time for a specific volume to flow through the orifice in a Hall Flowmeter Funnel and expressing the ratio in seconds per 20 cubic
3
centimetres. (s/20 cm ).
4. Summary of Test Method
3
4.1 A 20 cm test portion of powder is prepared from the lot to be tested following the procedures in Test Methods B215 and
B703.
1
This test method is under the jurisdiction of ASTM Committee B09 on Metal Powders and Metal Powder Products and is the direct responsibility of Subcommittee B09.02
on Base Metal Powders.
Current edition approved Nov. 15, 2011April 1, 2017. Published November 2011April 2017. Originally approved in 1994. Last previous edition approved in 20062011
as B855 – 06.B855 – 11. DOI: 10.1520/B0855-11.10.1520/B0855-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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 the ASTM website.
3
Available from ASTM or Metal Powder Industries Federation, 105 College Road East, Princeton, NJ 08540 and initially reported in MPIF Standard 48
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
B855 − 17
3
4.2 This 20 cm test portion is timed as it flows through the orifice in a Hall Flowmeter Funnel following the procedure in Test
Method B213.
3
4.3 The volumetric flow rate is calculated and reported in seconds per 20 cubic centimetres. (s/20 cm )
5. Significance and Use
5.1 The volumetric flow rate is a measure of the flow characteristics of a metal powder. Measuring flow by volume as compared
with flow per unit mass eliminates the variable of the powder density and relates to the production practice of die filling by volume.
5.2 The ability of a powder to
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.