ASTM B528-05

Standard Test Method for Transverse Rupture Strength of Metal Powder Specimens

SIGNIFICANCE AND USE
This test method is used to measure the strength of sintered, including post-treated, specimens. Transverse rupture strength is not a design value. For many sintered materials, transverse rupture strength is approximately twice the ultimate tensile strength.
SCOPE
1.1 This test method covers determination of the transverse rupture strength of sintered, including post-treated, metal powder test specimens by subjecting them to a uniformly increasing transverse force under controlled conditions. The term "transverse rupture strength" as used herein, defines the stress, calculated from the flexure formula required to break a specimen as a simple beam supported near the ends and applying the force midway between the fixed line center of the supports.
1.2 Limitations The transverse rupture test is only applicable to relatively brittle materials. In cases where a ductile specimen is being tested and the permanent deflection as a result of testing exceeds 0.020 in. (0.50 mm), the test results may be questionable.
1.3 Test Method B 406 should be consulted for determining the transverse rupture strength of cemented carbides.
1.4 The values stated in inch-pound units are to be regarded as the standard. The SI values are provided for information only.
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

• Status: Historical
• Publication Date: 31-Oct-2005
• ICS: 77.160 - Powder metallurgy
• Technical Committee: B09 - Metal Powders and Metal Powder Products
• Drafting Committee: B09.05 - Structural Parts

Relations

• Replaces: ASTM B528-99 - Standard Test Method for Transverse Rupture Strength of Metal Powder Specimens
• Effective Date: 01-Nov-2005
• Replaced By: ASTM B528-10 - Standard Test Method for Transverse Rupture Strength of Metal Powder Specimens
• Effective Date: 01-Jun-2010
• Referred By: ASTM B895-16(2020)e1 - Standard Test Methods for Evaluating the Corrosion Resistance of Stainless Steel Powder Metallurgy (PM) Parts/Specimens by Immersion in a Sodium Chloride Solution
• Effective Date: 01-Nov-2005
• Referred By: ASTM B312-20 - Standard Test Method for Green Strength of Specimens Compacted from Metal Powders
• Effective Date: 01-Nov-2005
• Referred By: ASTM B783-19 - Standard Specification for Materials for Ferrous Powder Metallurgy (PM) Structural Parts
• Effective Date: 01-Nov-2005
• Referred By: ASTM B925-15(2022) - Standard Practices for Production and Preparation of Powder Metallurgy (PM) Test Specimens
• Effective Date: 01-Nov-2005

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:B528–05
Standard Test Method for
1
Transverse Rupture Strength of Metal Powder 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.
1. Scope* B406 Test Method for Transverse Rupture Strength of
Cemented Carbides
1.1 This test method covers determination of the transverse
B925 Practices for Production and Preparation of Powder
rupture strength of sintered, including post-treated, metal
Metallurgy (PM) Test Specimens
powder test specimens by subjecting them to a uniformly
increasing transverse force under controlled conditions. The
3. Terminology
term “transverse rupture strength” as used herein, defines the
3.1 Definitions—Fordefinitionsoftermsinthistestmethod,
stress, calculated from the flexure formula required to break a
see Terminology B243.
specimen as a simple beam supported near the ends and
applying the force midway between the fixed line center of the
4. Significance and Use
supports.
4.1 This test method is used to measure the strength of
1.2 Limitations— The transverse rupture test is only appli-
sintered, including post-treated, specimens. Transverse rupture
cable to relatively brittle materials. In cases where a ductile
strength is not a design value. For many sintered materials,
specimen is being tested and the permanent deflection as a
transverse rupture strength is approximately twice the ultimate
result of testing exceeds 0.020 in. (0.50 mm), the test results
tensile strength.
may be questionable.
1.3 Test Method B406 should be consulted for determining
5. Apparatus
the transverse rupture strength of cemented carbides.
5.1 Micrometer, capable of measuring with a resolution of
1.4 The values stated in inch-pound units are to be regarded
0.0001 in. (0.002 mm).
as the standard. The SI values are provided for information
5.2 Transverse Rupture Strength Fixture,asshowninFig.1.
only.
5.3 Compression Testing Machine, capable of applying a
1.5 This standard does not purport to address all of the
breaking force on the test specimen with an accuracy of 1.0 %
safety concerns, if any, associated with its use. It is the
and readable to the nearest 10 lbf (50 N).
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
6. Test Specimen
bility of regulatory limitations prior to use.
6.1 The thin test specimen shall have the shape and dimen-
sions shown in the figure titled P/M Transverse Rupture
2. Referenced Documents
Strength Test Specimen of Practices B925.
2
2.1 ASTM Standards:
B243 Terminology of Powder Metallurgy
7. Procedure
B312 Test Method for Green Strength of Specimens Com-
7.1 Prepare test specimens by pressing and sintering using
pacted from Metal Powders
tooling shown in the figure titled Transverse Rupture Test
Specimen, Typical Laboratory Tooling of Practices B925,or
machine from finished parts. Measure the width and thickness
1
This test method is under the jurisdiction of ASTM Committee B09 on Metal
of the specimens to the nearest 0.001 in. (0.03 mm) with a
Powders and Metal Powder Products and is the direct responsibility of Subcom-
micrometer.
mittee B09.05 on Structural Parts.
7.2 Locatethespecimeninthetransverserupturetestfixture
Current edition approved Nov. 1, 2005. Published November 2005. Originally
perpendicular to the supporting rods.Apply compressive force
approved in 1970. Last previous edition approved in 1999 as B528 – 99. DOI:
10.1520/B0528-05.
parallel to the pressing direction of the specimen at a no-load
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
crosshead speed of not greater than 0.2 in. (5.0 mm)/min until
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
rupture occurs. Record this breaking force to the nearest 10 lbf
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. (50 N).
*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

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B528–05
NOTE—This fixture is used in Test Method B312.
FIG. 1 Transverse Rupture Test Fixture
8. Calculation 10. Precision
8.1 Calculate the transverse rupture strength of the speci-
10.1 On the basis of test error alone, the difference in the
men as follows:
absolute value of two test results, x and x . obtained in the
1 2
2
same laboratory on the same material, will be expected to
TRS 5 ~3 3 P 3 L!/ ~2 3 t 3 w! (1)
e
...