ASTM E448-82(2008)

Standard Practice for Scleroscope Hardness Testing of Metallic Materials (Withdrawn 2017)

ABSTRACT
This practice establishes the standard procedures for the determination of the Scleroscope hardness of metallic materials, the verification of Scleroscope hardness instruments by a standardized test block method, and alternatively, the calibration of standardized hardness test blocks used for the verification of Scleroscope hardness instruments.
SCOPE
1.1 This practice covers the determination of the Scleroscope hardness of metallic materials (Part A), the verification of Scleroscope hardness instruments (Part B), and the calibration of standardized hardness test blocks (Part C).
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 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.
WITHDRAWN RATIONALE
This practice covers the determination of the Scleroscope1 hardness of metallic materials (Part A), the verification of Scleroscope hardness instruments (Part B), and the calibration of standardized hardness test blocks (Part C).
Formerly under the jurisdiction of Committee E28 on Mechanical Testing, this practice was withdrawn in January 2017 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.

General Information

• Status: Withdrawn
• Publication Date: 31-Aug-2008
• Withdrawal Date: 08-Jan-2017
• ICS: 77.040.10 - Mechanical testing of metals
• Technical Committee: E28 - Mechanical Testing
• Drafting Committee: E28.06 - Indentation Hardness Testing

Relations

• Replaces: ASTM E448-82(2002)e1 - Standard Practice for Scleroscope Hardness Testing of Metallic Materials
• Effective Date: 01-Sep-2008
• Referred By: ASTM F3122-14(2022) - Standard Guide for Evaluating Mechanical Properties of Metal Materials Made via Additive Manufacturing Processes
• Effective Date: 01-Sep-2008
• Referred By: ASTM C886-21 - Standard Test Method for Scleroscope Hardness Testing of Carbon and Graphite Materials
• Effective Date: 01-Sep-2008

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:E448 −82 (Reapproved 2008)
Standard Practice for
1
Scleroscope Hardness Testing of Metallic Materials
This standard is issued under the fixed designation E448; 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 3.1.1 calibration—determination of the values of the sig-
nificant parameters by comparison with values indicated by a
1.1 This practice covers the determination of the Sclero-
2 reference instrument or by a set of reference standards.
scope hardness of metallic materials (Part A), the verification
3.1.2 forged roll Scleroscope hardness number (HFRSc or
of Scleroscope hardness instruments (Part B), and the calibra-
4
HFRSd) —a number related to the height of rebound of a
tion of standardized hardness test blocks (Part C).
diamond-tipped hammer dropped on a forged steel roll. It is
1.2 The values stated in inch-pound units are to be regarded
measured on a scale determined by dividing into 100 units the
as standard. The values given in parentheses are mathematical
average rebound of a hammer from a forged steel roll of
conversions to SI units that are provided for information only
accepted maximum hardness.
and are not considered standard.
NOTE 1—The flat striking surface of the hammer in the forged roll
1.3 This standard does not purport to address all of the
Scleroscope is slightly larger than the corresponding surface in the
safety problems, if any, associated with its use. It is the
Scleroscope described in 3.1.3 (see Fig. 1). Hence the forged roll
responsibility of the user of this standard to establish appro-
Scleroscope yields correspondingly higher hardness numbers.
priate safety and health practices and determine the applica-
3.1.3 Scleroscope hardness number (HSc or HSd)—a num-
bility of regulatory limitations prior to use.
ber related to the height of rebound of a diamond-tipped
hammerdroppedonthematerialbeingtested.Itismeasuredon
2. Referenced Documents
a scale determined by dividing into 100 units the average
3
2.1 ASTM Standards:
rebound of the hammer from a quenched (to maximum
A427 Specification for Wrought Alloy Steel Rolls for Cold
hardness) and untempered high carbon water-hardening tool
and Hot Reduction
steel test block of AISI W-5.
E140 Hardness Conversion Tables for Metals Relationship
3.1.4 Scleroscope hardness test—a dynamic indentation
Among Brinell Hardness, Vickers Hardness, Rockwell
hardness test using a calibrated instrument that drops a
Hardness, Superficial Hardness, Knoop Hardness, Sclero-
diamond-tipped hammer (Note 2) from a fixed height onto the
scope Hardness, and Leeb Hardness
surface of the material under test. The height of rebound of the
hammer is a measure of the hardness of the material.
3. Terminology
NOTE2—Anall-steel“MagnifierHammer”thatyieldedagreaterspread
3.1 Definitions:
in hardness readings on soft nonferrous metals has been available. This
hammer has become obsolete and, hence, is not considered in this
practice.
1
This practice is under the jurisdiction ofASTM Committee E28 on Mechanical
3.1.5 verification—confirmation by examination and provi-
Testing and is the direct responsibility of E28.06 on Indentation Hardness Testing.
Current edition approved Sept. 1, 2008. Published January 2009. Originally
sion of evidence that an instrument, material, reference or
ε1
approved in 1972. Last previous edition approved in 2002 as E448 – 82 (2002) .
standard is in conformance with a specification.
2
Registered trademark of the Shore Instrument & Mfg. Co., Inc. DOI: 10.1520/
E0448-82R08.
3 4
For referenced ASTM standards, visit the ASTM website, www.astm.org, or The conversion from Forged Roll “C” Scleroscope hardness to Vickers
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM hardness contained in Specification A427 and to Rockwell C hardness contained in
Standards volume information, refer to the standard’s Document Summary page on Standard E140 are presently the only Scleroscope hardness conversions in ASTM
the ASTM website. standards.
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E448−82 (2008)
FIG. 1 Profile of Scleroscope Diamond Showing Range of Diam-
etersofFlatTip
GENERAL DESCRIPTION OF INSTRUMENTS AND TEST PROCEDURE FOR SCLEROSCOPE
HARDNESS TEST
4. Apparatus
4.1 The instrument used for determining Scleroscope hard- 4.4.1 There are two sizes of diamond-tipped hammers
ness numbers is supplied in two models designated Model C commonly used in the Scleroscope hardness instruments.
5
and M
...