ASTM B528-16(2020)e1

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.
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Designation: B528 − 16 (Reapproved 2020)
Standard Test Method for
Transverse Rupture Strength of Powder Metallurgy (PM)
Specimens
This standard is issued under the fixed designation B528; 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.
ε NOTE—An editorial change was made to 10.1 in October 2020.
1. Scope* 2. Referenced Documents
2.1 ASTM Standards:
1.1 This test method covers determination of the transverse
rupture strength of sintered, including post-treated, powder B243 Terminology of Powder Metallurgy
B312 Test Method for Green Strength of Specimens Com-
metallurgy test specimens by subjecting them to a uniformly
increasing transverse force under controlled conditions. The pacted from Metal Powders
B406 Test Method for Transverse Rupture Strength of Ce-
term “transverse rupture strength” as used herein, defines the
stress, calculated from the flexure formula required to break a mented Carbides
B925 Practices for Production and Preparation of Powder
specimen as a simple beam supported near the ends and
applying the force midway between the fixed line center of the Metallurgy (PM) Test Specimens
E691 Practice for Conducting an Interlaboratory Study to
supports.
Determine the Precision of a Test Method
1.2 Limitations—The transverse rupture test is only appli-
cable to relatively brittle materials. In cases where a ductile
3. Terminology
specimen is being tested and the permanent deflection as a
3.1 Definitions—For definitions of terms in this test method,
result of testing exceeds 0.02 in. (0.5 mm), the test results may
see Terminology B243.
be questionable.
1.3 Test Method B406 should be consulted for determining 4. Significance and Use
the transverse rupture strength of cemented carbides.
4.1 This test method is used to measure the strength of
sintered, including post-treated, specimens. Transverse rupture
1.4 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical strength is not a design value. For many sintered materials,
transverse rupture strength is approximately twice the ultimate
conversions to SI units that are provided for information only
and are not considered standard. tensile strength.
1.5 This standard does not purport to address all of the
5. Apparatus
safety concerns, if any, associated with its use. It is the
5.1 Micrometer, capable of measuring with a resolution of
responsibility of the user of this standard to establish appro-
0.0001 in. (0.002 mm).
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
5.2 Transverse Rupture Strength Fixture,asshowninFig.1.
1.6 This international standard was developed in accor-
5.3 Compression Testing Machine, readable to within 0.1 %
dance with internationally recognized principles on standard-
of full scale reading. Use the lowest testing range that can
ization established in the Decision on Principles for the
provide a measurable result.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
6. Test Specimen
Barriers to Trade (TBT) Committee.
6.1 The thin test specimen shall have the shape and dimen-
sions shown in the figure titled PM Transverse Rupture
Strength Test Specimen of Practices B925.
This test method is under the jurisdiction of ASTM Committee B09 on Metal
Powders and Metal Powder Products and is the direct responsibility of Subcommit-
tee B09.05 on Structural Parts. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2020. Published October 2020. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1970. Last previous edition approved in 2016 as B528 – 16. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/B0528-16R20E01. the ASTM website.
*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
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B528 − 16 (2020)
NOTE 1—This fixture is used in Test Method B312.
FIG. 1 Transverse Rupture Test Fixture
7. Procedure 8. Calculation
7.1 Prepare test specimens by pressing and sintering using
8.1 Calculate the transverse rupture strength of the speci-
tooling shown in the figure titled Transverse Rupture Test
men as follows:
Specimen, Typical Laboratory Tooling of Practices B925,or
TRS 5 3 3 P 3 L / 2 3 T 3 W (1)
~ ! ~ !
machine from finished parts. Measure the width and thickness
of the specimens to the nearest 0.001 in. (0.02 mm) with a where:
micrometer.
TRS = transverse rupture strength of the specimen, psi
(MPa),
7.2 Locat
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