Foreword
Committees responsible
Methods
Section one. General
1 Scope
2 Definitions
3 Symbols and designations of hardness
Section two. Determination of Rockwell superficial
               hardness
4 Principle
5 Test apparatus
6 Conditions of test
7 Test procedure
8 Calculations
Section three. Direct verification of accuracy of
               testing machine
9 Principle
10 Traceability
11 Force
12 Indenter
13 Measuring device
14 Anvils
15 Performance test
Section four. Indirect verification of accuracy of
               testing machine
16 Principle
17 Manufacture of hardness test blocks
18 Calibration of hardness test blocks
19 Standardizing machine
20 Procedure for indirect verification of testing
    machine
21 Assessment of accuracy of the testing machine
Appendices
A Monitoring the accuracy of the testing machine
B Additional information on the superficial hardness
    test (Rockwell)
C Corrections to Rockwell superficial hardness values
    obtained on convex cylindrical surfaces
Tables
1 Rockwell superficial hardness scales
2 Dimensions of indenter balls for standardizing
    machines
3 Permissible error in value of test block
4 Correction for test results obtained with diamond
    cone indenter using HRN scales
5 Correction for test results obtained with ball
    indenter using HRT scales
Figures
1 Test with diamond cone (Rockwell superficial scale
    HRN)
2 Test with steel ball (Rockwell superficial scale
    HRT)
3 Minimum thickness of test piece for Rockwell
    superficial N scales
4 Minimum thickness of test piece for Rockwell
    superficial T scales
5 Approximate diameter of indentation for calculation
    of indentation location
6 Typical permissible monitoring results for a
    standardizing machine
7 Testing machine repeatability requirements at
    different hardness values