Gordon England Surface Engineering Forum

Test Piece Minimum Thickness for Rockwell Hardness Test
( diamond indenter )

TEST ROCKWELL SUPERFICIAL ROCKWELL
SPECIMEN Diamond "N" Brale Indentor Diamond Brale Indenter
THICKNESS HR 15 N HR 30 N HR 45 N HRA HRD HRC
inches mm 15 kg 30 kg 45 kg 60 kg 100 kg 150 kg
0.006 0.15 92 N N N N N
0.008 0.2 90 N N N N N
0.010 0.25 88 N N N N N
0.012 0.3 83 82 77 N N N
0.014 0.36 76 80 74 N N N
0.016 0.41 68 74 72 86 N N
0.018 0.46 Y 66 68 84 N N
0.020 0.51 Y 57 63 82 77 N
0.022 0.56 Y 47 58 78 75 69
0.024 0.61 Y Y 51 76 72 67
0.026 0.66 Y Y 37 71 68 65
0.028 0.71 Y Y 20 67 63 62
0.030 0.76 Y Y Y 60 58 57
0.032 0.81 Y Y Y Y 51 52
0.034 0.86 Y Y Y Y 43 45
0.036 0.91 Y Y Y Y X 37
0.038 0.97 Y Y Y Y Y 28
0.040 1.02 Y Y Y Y Y 20
Test Piece Minimum Thickness for Rockwell Hardness Test (diamond indenter)






LINKS TO:
Hardness Testing
Rockwell Hardness Test
Rockwell Superficial Hardness Test
Brinell Hardness Test
Vickers Hardness Test
Microhardness Test
Mohs Hardness Test
Scleroscope and other hardness testing methods

TABLES and CHARTS:
Hardness Conversion Table (colour version - may take time to load)
Hardness Conversion Table (non-colour version)
Hardness Conversion Chart (1)
Hardness Conversion Chart (2)
Chart of Brinell, Vickers and Ultimate Tensile Strength Equivalents (1)
Chart of Brinell, Vickers and Ultimate Tensile Strength Equivalents (2)
Hardness Conversion Table related to Rockwell C Hardness Scale (hard materials) (colour)
Hardness Conversion Table related to Rockwell C Hardness Scale (hard materials) (non-colour)
Hardness Conversion Chart related to Rockwell C Hardness Scales (hard materials)
Estimated Hardness Equivalent Chart related to Rockwell C and Vickers (hard materials)
Hardness Conversion Table related to Rockwell B Hardness Scale (soft metals) (colour)
Hardness Conversion Table related to Rockwell B Hardness Scale (soft metals) (non-colour)
Hardness Conversion Chart related to Rockwell B Hardness Scale (soft metals)
Table of Minimum Test Piece Thickness for Rockwell Hardness Testing using Ball Indenters
Table of Minimum Test Piece Thickness for Rockwell Hardness Testing using Diamond Indenters
HV, MPa and GPa Conversion Calculator



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