### This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

### This is embarrasing...

An error occurred while processing the form. Please try again in a few minutes.

# ASTM International - ASTM E18-07

## Standard Test Methods for Rockwell Hardness of Metallic Materials

inactive
 Organization: ASTM International Publication Date: 1 April 2007 Status: inactive Page Count: 36 ICS Code (Mechanical testing of metals): 77.040.10
##### significance And Use:

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 standard includes additional requirements in annexes:

 Verification of Rockwell Hardness Testing Machines Rockwell Hardness Standardizing Machines Standardization of Rockwell Indenters Standardization of Rockwell Hardness Test Blocks Guidelines for Determining the Minimum Thickness of a Test Piece Hardness Value Corrections When Testing on Convex Cylindrical Surfaces

1.3 This standard includes nonmandatory information in appendixes which relates to the Rockwell hardness test.

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

1.4 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.

1.5 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.

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.

### 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...
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...
ASTM E18-07
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...