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ASTM A833-84(2001)

(Practice)

Standard Practice for Indentation Hardness of Metallic Materials by Comparison Hardness Testers

Standard Practice for Indentation Hardness of Metallic Materials by Comparison Hardness Testers

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 standardized test blocks in accordance with 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 indenting force used during comparison hardness testing is normally an impact load applied by striking a hammer at the appropriate areas as outlined in the manufacturer's instructions. Final indentation diameter in both the comparative test bar and material tested shall be within the range of the comparator used for the instrument.  
1.5 This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all the safety problems associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
03-Oct-1984
ICS
77.040.10 - Mechanical testing of metals
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.06 - Steel Forgings and Billets
Current Stage
Ref Project

Relations

Replaces
ASTM A833-84(1996) - Standard Practice for Indentation Hardness of Metallic Materials by Comparison Hardness Testers
Effective Date
04-Oct-1984
Replaced By
ASTM A833-08 - Standard Practice for Indentation Hardness of Metallic Materials by Comparison Hardness Testers
Effective Date
01-Mar-2008
Referred By
ASTM A1058-19 - Standard Test Methods for Mechanical Testing of Steel Products—Metric
Effective Date
04-Oct-1984
Referred By
ASTM E10-23 - Standard Test Method for Brinell Hardness of Metallic Materials
Effective Date
04-Oct-1984
Referred By
ASTM A370-23 - Standard Test Methods and Definitions for Mechanical Testing of Steel Products
Effective Date
04-Oct-1984
Referred By
ASTM A788/A788M-23 - Standard Specification for Steel Forgings, General Requirements
Effective Date
04-Oct-1984
Referred By
ASTM E110-14(2023) - Standard Test Method for Rockwell and Brinell Hardness of Metallic Materials by Portable Hardness Testers
Effective Date
04-Oct-1984

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ASTM A833-84(2001) - Standard Practice for Indentation Hardness of Metallic Materials by Comparison Hardness TestersASTM A833-84(2001) - Standard Practice for Indentation Hardness of Metallic Materials by Comparison Hardness Testers
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ASTM A833-84(2001) - Standard Practice for Indentation Hardness of Metallic Materials by Comparison Hardness Testers
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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:A 833–84 (Reapproved 2001)
Standard Practice for
Indentation Hardness of Metallic Materials by Comparison
Hardness Testers
This standard is issued under the fixed designation A 833; 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.
1. Scope structures, or for testing under any conditions that require that
the indenting force be applied in a direction other than vertical.
1.1 This practice covers the determination of indentation
3.1.1 Required equipment includes an apparatus that con-
hardness of metallic materials using comparison hardness
tains the Brinell ball and a slot or spacing to insert the
testers.
calibration bar, the bar and an impacting tool, normally a
1.2 This practice applies only to those comparison hardness
hammer. This apparatus is designed to allow a ball impression
testers, normally portable, that use standardized test blocks in
to be produced on the standard rod simultaneously with one
accordance with Test Method E 10 as a basis for comparison.
produced on the piece to be tested. Calibration tables (slide
1.3 Calibration of comparative test bars (rods), used for
rule) are used to compare impression diameters and the
comparison to determine hardness numbers, is also covered by
hardness of the calibration bar to determine the hardness of the
this practice.
piece.
1.4 The indenting force used during comparison hardness
3.1.2 This apparatus is designed with a surface directly
testing is normally an impact load applied by striking a
above the Brinell ball where impact is to occur. The apparatus
hammer at the appropriate areas as outlined in the manufac-
may also be designed to include an extension for stabilization.
turer’s instructions. Final indentation diameter in both the
3.2 Measuring Microscope—The divisions of the microme-
comparative test bar and material tested shall be within the
ter scale on the microscope, or other measuring devices used
range of the comparator used for the instrument.
for the measurement of the diameter of the impression, shall
1.5 This standard does not purport to address all of the
permit the direct measuring of the diameter to 0.1 mm and the
safety problems, if any, associated with its use. It is the
estimation of the diameter to 0.02 mm. This requirement
responsibility of the user of this standard to establish appro-
applies to the construction of the microscope only and is not a
priate safety and health practices and determine the applica-
requirement for measurement of the impression.
bility of regulatory limitations prior to use.
4. Test Parts
2. Referenced Documents
4.1 Partstestedbythishardnesstestingpracticevarygreatly
2.1 ASTM Standards:
in form since it is frequently desirable to make the impression
A 370 Test Methods and Definitions for MechanicalTesting
2 upon a part to be used in the finished product rather than upon
of Steel Products
a sample test specimen.
E 10 Test Method for Brinell Hardness of Metallic Materi-
3 4.1.1 Dimensions—The thickness of the tested part shall be
als
such that no bulge or other marking showing the effect of the
3. Apparatus load appears on the side of the piece opposite the impression.
In any event, the thickness of the part shall be at least ten times
3.1 Comparison hardness testers are used principally for
the depth of the indentation. The minimum width shall be at
testing articles that are too large or unwieldy to be tested in the
least two and one half times the diameter of the indentation.
usual types of testing machines, for testing parts of fixed
4.1.2 Finish—When necessary, the surface on which the
impression is to be made shall be filed, ground, machined, or
polished with abrasive material so that the edge of the
This practice is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
impression shall be defined clearly enough to permit the
A01.06 on Steel Forgings and Billets.
measurement of the diameter to the specified accuracy. Take
Current edition approved Oct. 4, 1984. Published December 1984.
care to avoid overheating or cold working the surface. Suffi-
Annual Book of ASTM Standards, Vol 01.03.
Annual Book of ASTM Standards, Vol 03.01. cient metal shall be
...

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4.1.1 These test methods may be and are used by other ASTM Committees and other standards writing bodies for the purpose of conformance testing.  
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4.2 These test methods are also suitable to be used for testing of steel, stainless steel and related alloy materials for other purposes, such as incoming material acceptance testing by the purchaser or evaluation of components after service exposure.  
4.2.1 As with any mechanical testing, deviations from either specification limits or expected as-manufactured properties can occur for valid reasons besides deficiency of the original as-fabricated product. These reasons include, but are not limited to: subsequent service degradation from environmental exposure (for example, temperature, corrosion); static or cyclic service stress effects, mechanically-induced damage, material inhomogeneity, anisotropic structure, natural aging of select alloys, further processing not included in the specification, sampling limitations, and measuring equipment calibration uncertainty. There is statistical variation in all aspects of mechanical testin...
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Sections  
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1.1 These test methods cover the tension testing of metallic materials in any form at room temperature, specifically, the methods of determination of yield strength, yield point elongation, tensile strength, elongation, and reduction of area.  
1.2 The gauge lengths for most round specimens are required to be 4D for E8 and 5D for E8M. The gauge length is the most significant difference between E8 and E8M test specimens. Test specimens made from powder metallurgy (P/M) materials are exempt from this requirement by industry-wide agreement to keep the pressing of the material to a specific projected area and density.  
1.3 Exceptions to the provisions of these test methods may need to be made in individual specifications or test methods for a particular material. For examples, see Test Methods and Definitions A370 and Test Methods B557, and B557M.  
1.4 Room temperature shall be considered to be 10 °C to 38 °C [50 °F to 100°F] unless otherwise specified.  
1.5 The values stated in SI units are to be regarded as separate from inch/pound units. The values stated in each system are not exact equivalents; therefore each system must be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.6 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, 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.

  • Standard
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  • Standard
    35 pages
    English language
    sale 15% off