ASTM A833-17
(Test Method)Standard Test Method for Indentation Hardness of Metallic Materials by Comparison Hardness Testers
Standard Test Method for Indentation Hardness of Metallic Materials by Comparison Hardness Testers
SIGNIFICANCE AND USE
4.1 The comparative hardness test is an empirical dynamic indentation hardness test. Comparative hardness tests provide useful information about metallic materials. This information may correlate to tensile strength, wear resistance, ductility, heat treatment condition, or other physical characteristics of metallic materials, and may be useful in quality control and selection of materials.
4.2 Comparative hardness testing at a specific location on a test part may not represent the physical characteristics of the whole test part or end product.
SCOPE
1.1 This test method covers the determination of indentation hardness of metallic materials using comparison hardness testers.
1.2 This test method applies only to those portable comparison hardness testers that use test bars that have been standardized according to Test Method E10 as a basis for comparison.
1.3 Calibration of test bars, used for comparison to determine hardness numbers, is also covered by this test method.
1.4 The impression force used during comparison hardness testing is normally an impact load applied by striking a hammer on the appropriate areas as outlined in the manufacturer's instructions.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.7 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
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: A833 − 17
Standard Test Method for
Indentation Hardness of Metallic Materials by Comparison
1
Hardness Testers
This standard is issued under the fixed designation A833; 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* E10 Test Method for Brinell Hardness of Metallic Materials
E177 Practice for Use of the Terms Precision and Bias in
1.1 Thistestmethodcoversthedeterminationofindentation
ASTM Test Methods
hardness of metallic materials using comparison hardness
E691 Practice for Conducting an Interlaboratory Study to
testers.
Determine the Precision of a Test Method
1.2 This test method applies only to those portable compari-
son hardness testers that use test bars that have been standard-
3. Terminology
ized according to Test Method E10 as a basis for comparison.
3.1 Definitions:
1.3 Calibration of test bars, used for comparison to deter-
3.1.1 test bar, n—that part of the testing apparatus which is
mine hardness numbers, is also covered by this test method. used to determine a comparable hardness used in calculation of
test part hardness.
1.4 The impression force used during comparison hardness
3.1.2 test part, n—the item for which a hardness test
testing is normally an impact load applied by striking a
hammer on the appropriate areas as outlined in the manufac- determination is being performed.
turer’s instructions.
4. Significance and Use
1.5 The values stated in SI units are to be regarded as
4.1 The comparative hardness test is an empirical dynamic
standard. No other units of measurement are included in this
indentation hardness test. Comparative hardness tests provide
standard.
useful information about metallic materials. This information
1.6 This standard does not purport to address all of the
maycorrelatetotensilestrength,wearresistance,ductility,heat
safety problems, if any, associated with its use. It is the
treatment condition, or other physical characteristics of metal-
responsibility of the user of this standard to establish appro-
licmaterials,andmaybeusefulinqualitycontrolandselection
priate safety, health, and environmental practices and deter-
of materials.
mine the applicability of regulatory limitations prior to use.
4.2 Comparative hardness testing at a specific location on a
1.7 This international standard was developed in accor-
test part may not represent the physical characteristics of the
dance with internationally recognized principles on standard-
whole test part or end product.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
5. Apparatus
mendations issued by the World Trade Organization Technical
5.1 Comparison hardness testers are used principally for
Barriers to Trade (TBT) Committee.
testing articles that are too large or unwieldy to be tested in the
2. Referenced Documents
usual types of testing machines, for testing parts of fixed
2
2.1 ASTM Standards:
structures, or for testing under any conditions that require that
A370 Test Methods and Definitions for Mechanical Testing the indenting force be applied in a direction other than vertical.
of Steel Products
5.1.1 Required equipment includes an apparatus that con-
tains the impression ball and a slot or spacing to insert the test
1
This test method is under the jurisdiction of ASTM Committee A01 on Steel,
bar, a structure to apply the impact (anvil), and an impacting
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
tool, normally a hammer. This apparatus is designed to allow a
A01.06 on Steel Forgings and Billets.
ball impression to be produced on the standard rod simultane-
Current edition approved Nov. 1, 2017. Published December 2017. Originally
ously with one produced on the piece to be tested. Comparison
approved in 1984. Last previous edition approved in 2014 as A833 – 08a(2014).
DOI: 10.1520/A0833-17.
of the impression diameters together with the hardness of the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
test bar is used to determine hardness of the test part.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1.2 The structure to convey the impact to the test bar,
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. impression ball, and test part is designed with the striking
*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 -----
...
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: A833 − 08a (Reapproved 2014) A833 − 17
Standard Practice Test Method for
Indentation Hardness of Metallic Materials by Comparison
1
Hardness Testers
This standard is issued under the fixed designation A833; 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 practice covers the determination of indentation hardness of metallic materials using comparison hardness testers.
1.2 This practice applies only to those comparison hardness testers, normally portable, that use comparative test bars that have
been standardized according to Test Method E10 as a basis for comparison.
1.3 Calibration of comparative test bars (rods), used for comparison to determine hardness numbers, is also covered by this
practice.
1.4 The impression force used during comparison hardness testing is normally an impact load applied by striking a hammer on
the appropriate areas as outlined in the manufacturer’s instructions.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 This standard does not purport to address all of the safety problems, 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.
2. Referenced Documents
2
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
E10 Test Method for Brinell Hardness of Metallic Materials
3. Significance and Use
3.1 The comparative hardness test is an empirical dynamic indentation hardness test. Comparative hardness tests provide useful
information about metallic materials. This information may correlate to tensile strength, wear resistance, ductility, heat treatment
condition, or other physical characteristics of metallic materials, and may be useful in quality control and selection of materials.
3.2 Comparative hardness testing at a specific location on a part may not represent the physical characteristics of the whole part
or end product.
4. Apparatus
4.1 Comparison hardness testers are used principally for testing articles that are too large or unwieldy to be tested in the usual
types of testing machines, for testing parts of fixed structures, or for testing under any conditions that require that the indenting
force be applied in a direction other than vertical.
4.1.1 Required equipment includes an apparatus that contains the impression ball and a slot or spacing to insert the comparative
test bar (rod), the comparative test bar, a structure to apply the impact (anvil), and an impacting tool, normally a hammer. This
apparatus is designed to allow a ball impression to be produced on the standard rod simultaneously with one produced on the piece
to be tested. Comparison of the impression diameters together with the hardness of the comparative bar (rod) is used to determine
hardness of the part.
1
This practice test method is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.06 on Steel Forgings and Billets.
Current edition approved Oct. 1, 2014Nov. 1, 2017. Published October 2014December 2017. Originally approved in 1984. Last previous edition approved in 20082014
as A833 – 08a(2014). DOI: 10.1520/A0833-08AR1410.1520/A0833-17.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A833 − 17
4.1.2 The structure to convey the impact to the test bar, impression ball, and part being tested is designed with the striking
surface for the impacting tool centered directly above the location of the impression ball.
4.1.3 The apparatus may also be designed to include an extension for stabilization.
4.1.4 The Brinell hardness of the comparison test bar (rod) used should be within 615% of the anticipated Brinell hardness of
the part being tested, and of the same general type of
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.