ASTM B647-84(2006)

Standard Test Method for Indentation Hardness of Aluminum Alloys by Means of a Webster Hardness Gage

SIGNIFICANCE AND USE
The Webster hardness gage is portable and therefore useful for in situ determination of the hardness of fabricated parts and individual test specimens for production control purposes. It is not as sensitive as Rockwell or Brinell hardness machines; see 10.2.
This test method should be used only as cited in applicable material specifications.
FIG. 1 Webster Hardness Gage, Model B
SCOPE
1.1 This test method covers the determination of indentation hardness of aluminum alloys with a Webster hardness gage, Model B.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. Note 1
Two other models, A and B-75, are in use, but are not covered in this test method. Model A does not provide numerical values of hardness and Model B-75 covers only a part of the range of interest for aluminum alloys.
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-Aug-2006
• ICS: 77.120.10 - Aluminium and aluminium alloys
• Technical Committee: B07 - Light Metals and Alloys
• Drafting Committee: B07.05 - Testing

Relations

• Replaces: ASTM B647-84(2000) - Standard Test Method for Indentation Hardness of Aluminum Alloys by Means of a Webster Hardness Gage
• Effective Date: 01-Sep-2006
• Replaced By: ASTM B647-10 - Standard Test Method for Indentation Hardness of Aluminum Alloys by Means of a Webster Hardness Gage
• Effective Date: 01-Dec-2010
• Referred By: ASTM E110-14(2023) - Standard Test Method for Rockwell and Brinell Hardness of Metallic Materials by Portable Hardness Testers
• Effective Date: 01-Sep-2006
• Referred By: ASTM E18-22 - Standard Test Methods for Rockwell Hardness of Metallic Materials
• Effective Date: 01-Sep-2006
• Referred By: ASTM B241/B241M-22 - Standard Specification for Aluminum and Aluminum-Alloy Seamless Pipe and Seamless Extruded Tube
• Effective Date: 01-Sep-2006
• Referred By: ASTM B308/B308M-20 - Standard Specification for Aluminum-Alloy 6061-T6 Standard Structural Profiles
• Effective Date: 01-Sep-2006
• Referred By: ASTM E10-23 - Standard Test Method for Brinell Hardness of Metallic Materials
• Effective Date: 01-Sep-2006
• Referred By: ASTM B945-21 - Standard Practice for Aluminum Alloy Extrusions Press Cooled from an Elevated Temperature Shaping Process for Production of T1, T2, T5 and T10-Type Tempers
• Effective Date: 01-Sep-2006
• Referred By: ASTM F3122-14(2022) - Standard Guide for Evaluating Mechanical Properties of Metal Materials Made via Additive Manufacturing Processes
• Effective Date: 01-Sep-2006
• Referred By: ASTM B807/B807M-20 - Standard Practice for Extrusion Press Solution Heat Treatment for Aluminum Alloys
• Effective Date: 01-Sep-2006

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:B647–84 (Reapproved 2006)
Standard Test Method for
Indentation Hardness of Aluminum Alloys by Means of a
Webster Hardness Gage
This standard is issued under the fixed designation B647; 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 parts and individual test specimens for production control
purposes. It is not as sensitive as Rockwell or Brinell hardness
1.1 This test method covers the determination of indentation
machines; see 10.2.
hardness of aluminum alloys with a Webster hardness gage,
4.2 This test method should be used only as cited in
Model B.
applicable material specifications.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
5. Apparatus ( Fig. 1)
only.
5.1 The Webster hardness gage, Model B, consists of three
NOTE 1—Two other models,Aand B-75, are in use, but are not covered
mainparts:theframe,operatinghandle,andpenetratorhousing
in this test method. Model A does not provide numerical values of
assembly. The penetrator housing assembly includes the prin-
hardness and Model B-75 covers only a part of the range of interest for
cipal working parts, including the penetrator, loading spring,
aluminum alloys.
adjusting nut, penetrator housing, housing key, return spring,
1.3 This standard does not purport to address all of the
and dial indicator.
safety concerns, if any, associated with its use. It is the
5.2 The indentor is a hardened steel truncated cone.
responsibility of the user of this standard to establish appro-
5.3 The dial indicator is graduated from 1 to 20, and is
priate safety and health practices and determine the applica-
actuated by the penetrator so that the higher the reading, the
bility of regulatory limitations prior to use.
higher is the hardness of the test material.
5.4 The configuration of the Webster hardness gage is such
2. Referenced Documents
that it is operated like a pair of pliers.
2.1 ASTM Standards:
5.5 The clearance between the penetrator and the anvil is
E6 TerminologyRelatingtoMethodsofMechanicalTesting
about 6 mm ( ⁄4 in.), limiting the thickness of sample that can
E10 Test Method for Brinell Hardness of Metallic Materials
be tested.
E18 Test Methods for Rockwell Hardness of Metallic Ma-
terials
6. Test Parts or Specimens
6.1 Any part or piece of material greater than 1 mm (0.04
3. Terminology
in.) in thickness and equal to or less than 6 mm ( ⁄4 in.) in
3.1 Definitions—The definitions of terms relating to hard-
thickness and with a clear flat area at an edge approximately 25
ness testing appearing in Terminology E6 shall be considered
by 25 mm (1 by 1 in.) in size is suitable for test.
as applying to the terms used in this test method.
6.2 The surfaces shall be essentially parallel, smooth, clean,
and free of mechanical damage.The test surface may be lightly
4. Significance and Use
polished to eliminate scratches or die lines.
4.1 The Webster hardness gage is portable and therefore
6.3 The clear, flat area shall be such that there will be a clear
useful for in situ determination of the hardness of fabricated
distance of at least 3 mm ( ⁄8 in.) from the edge of the part or
specimen.
This test method is under the jurisdiction of ASTM Committee B07 on Light
6.4 Parts or specimens with a slight taper or curvature may
Metals and Alloys and is the direct responsibility of Subcommittee B07.05 on
also be tested if a round anvil is used, as described in 8.1.1 and
Testing.
Fig. 2.
Current edition approved Sept. 1, 2006. Published September 2006. Originally
approved in 1984. Last previous edition approved in 2000 as B647 – 84 (2000).
7. Calibration
DOI: 10.1520/B0647-84R06.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.1 Zero Adjustment:
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7.1.1 Operate the instrument against the bare anvil and note
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. whether or not the indicator gives the zero (full-scale) reading.
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B647–84 (2006)
FIG. 1 Webster Hardness Gage, Model B
FIG. 2
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