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ASTM International - ASTM E18-19

Standard Test Methods for Rockwell Hardness of Metallic Materials

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Organization: ASTM International
Publication Date: 1 January 2019
Status: inactive
Page Count: 39
ICS Code (Mechanical testing of metals): 77.040.10
significance And Use:

4.1 The Rockwell hardness test is an empirical indentation hardness test that can provide useful information about metallic materials. This information may correlate to tensile strength, wear... View More

scope:

1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard provides the requirements for Rockwell hardness machines and the procedures for performing Rockwell hardness tests.

1.2 This test method includes requirements for the use of portable Rockwell hardness testing machines that measure Rockwell hardness by the Rockwell hardness test principle and can meet all the requirements of this test method, including the direct and indirect verifications of the testing machine. Portable Rockwell hardness testing machines that cannot meet the direct verification requirements and can only be verified by indirect verification requirements are covered in Test Method E110.

1.3 This standard includes additional requirements in the following annexes:

Verification of Rockwell Hardness Testing Machines Annex A1
Rockwell Hardness Standardizing Machines Annex A2
Standardization of Rockwell Indenters Annex A3
Standardization of Rockwell Hardness Test Blocks Annex A4
Guidelines for Determining the Minimum Thickness of a
 Test Piece
Annex A5
Hardness Value Corrections When Testing on Convex
 Cylindrical Surfaces
Annex A6

1.4 This standard includes nonmandatory information in the following appendixes that relates to the Rockwell hardness test.

List of ASTM Standards Giving Hardness Values Corresponding
 to Tensile Strength
Appendix X1
Examples of Procedures for Determining Rockwell
 Hardness Uncertainty
Appendix X2

1.5 Units-At the time the Rockwell hardness test was developed, the force levels were specified in units of kilograms-force (kgf) and the indenter ball diameters were specified in units of inches (in.). This standard specifies the units of force and length in the International System of Units (SI); that is, force in Newtons (N) and length in millimeters (mm). However, because of the historical precedent and continued common usage, force values in kgf units and ball diameters in inch units are provided for information and much of the discussion in this standard refers to these units.

1.6 The test principles, testing procedures, and verification procedures are essentially identical for both the Rockwell and Rockwell superficial hardness tests. The significant differences between the two tests are that the test forces are smaller for the Rockwell superficial test than for the Rockwell test. The same type and size indenters may be used for either test, depending on the scale being employed. Accordingly, throughout this standard, the term Rockwell will imply both Rockwell and Rockwell superficial unless stated otherwise.

1.7 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.

1.8 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.

Document History

February 1, 2020
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
ASTM E18-19
January 1, 2019
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
October 1, 2018
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
July 1, 2018
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
July 1, 2017
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
July 1, 2017
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
May 1, 2016
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
February 1, 2015
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
October 1, 2014
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
January 1, 2014
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
December 1, 2012
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
November 1, 2011
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
December 1, 2008
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
May 15, 2008
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
January 15, 2008
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
April 1, 2007
Standard Test Methods for Rockwell Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials by the Rockwell indentation hardness principle. This standard...
April 1, 2005
Standard Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials, including test methods for the verification of machines for...
February 1, 2005
Standard Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials, including test methods for the verification of machines for...
June 10, 2003
Standard Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials, including test methods for the verification of machines for...
June 10, 2003
Standard Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials, including test methods for the verification of machines for...
January 10, 2002
Standard Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials, including test methods for the verification of machines for...
January 10, 2002
Standard Test Methods for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Materials
1.1 These test methods cover the determination of the Rockwell hardness and the Rockwell superficial hardness of metallic materials, including test methods for the verification of machines for...
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