ASTM B215-96
(Practice)Standard Practices for Sampling Finished Lots of Metal Powders
Standard Practices for Sampling Finished Lots of Metal Powders
SCOPE
1.1 These practices cover two procedures for selecting representative samples of metal powders for subsequent testing:
1.1.1 Practice A -For powders in the process of being packaged from blenders or storage tanks.
1.1.2 Practice B -For powders already packaged in containers.
1.2 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.
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Designation: B 215 – 96
Standard Practices for
1
Sampling Finished Lots of Metal Powders
This standard is issued under the fixed designation B 215; 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 (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.2.5 test portion (test specimen)—a defined quantity of
powder actually drawn from the test sample and on which the
1.1 These practices cover two procedures for selecting
test is actually performed.
representative samples of metal powders for subsequent test-
3.2.6 test sample—a quantity of powder taken from the
ing:
composite sample for determining a single property or for
1.1.1 Practice A—For powders in the process of being
preparing the test pieces. It normally should be taken by
packaged from blenders or storage tanks.
splitting the composite sample.
1.1.2 Practice B—For powders already packaged in con-
tainers.
4. Significance and Use
1.2 This standard does not purport to address all of the
4.1 Since many tests are performed using very small
safety concerns, if any, associated with its use. It is the
amounts of powder, it is most important that the test portion be
responsibility of the user of this standard to establish appro-
obtained in a standardized manner. The practices described
priate safety and health practices and determine the applica-
here take into account the possibility of segregation of the
bility of regulatory limitations prior to use.
metal powder during the filling of containers and after the
2. Referenced Documents containers are full.
2.1 ASTM Standards:
PRACTICE A
2
B 243 Terminology of Powder Metallurgy
5. Apparatus
3. Terminology
5.1 Rectangular Receptacle, capable of being moved com-
3.1 Definitions —Definitions of powder metallurgy terms
pletely across the stream of flowing powder at a constant speed
can be found in Terminology B 243. Additional descriptive
and having a length and width greater than the stream of
information is available in the Related Materials section of Vol
powder. It must be large enough that there is no overflow when
02.05 of the Annual Book of ASTM Standards .
collecting the sample.
3.2 Description of Terms:
5.2 Small Blender.
3.2.1 composite sample—the blended entire gross sample or
5.3 Sample Splitter (+).
a representative part thereof.
3.2.2 gross sample—a quantity of powder consisting of all
6. Procedure
the increments taken from a single lot.
6.1 Pass the rectangular receptacle completely through the
3.2.3 increment—a quantity of powder obtained by a sam-
stream of flowing powder at a constant speed. If the entire
pling at one time from a single lot.
contents of one lot of powder is being packed in a single
3.2.4 lot—a definite quantity of powder processed or pro-
1 1 3
container, take increments when the container is ⁄4 , ⁄2 , and ⁄4
duced under uniform conditions.
filled. If several containers are to be filled by one lot of powder,
1
take the first increment when the first container is ⁄2 filled, the
second increment in the middle of the run, and the third
1
increment near the end of the run. Additional increments may
These practices are under the jurisdiction of ASTM Committee B-9 on Metal
Powder and Metal Powder Products and are the direct responsibility of Subcom-
be agreed upon by the parties concerned. The total of all
mittee B09.02 on Base Metal Powders.
increments shall be at least 5000 g.
Current edition approved March 10, 1996. Published May 1996. Originally
6.2 Blend the gross sample composed of at least 5000 g in
published as B 215 – 46. Last previous edition B 215 – 90.
2
Annual Book of ASTM Standards , Vol 02.05. a small blender for 10 to 15 revolutions.
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B215–96
FIG. 2 Sample Splitter
between the center of the cross section and the periphery down
to the bottom of the container. Then twist the sampler to open
the slots allowing powder to flow into the sampler. When filled,
the slots are closed. Remove the sampler, and empty the
contents into a suitable container.
9.2 When a suitable number of increments have been taken,
FIG. 1 Keystone Sampler
blend them for 10 to 15 revolutions to obtain a composite
sample.
6.3 Pass the blended gross sample or composite sample
9.3 Pass the composite sample through a sample splitter to
through a sample splitter to form a number of test samples
obtain the test samples.
depending on the design of the splitter. Then use these test
9.4 Obtain the test portio
...
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