Gordon England Surface Engineering Forum

Hardness Conversion Table

Approximate Hardness Equivalents Covering Range of Rockwell C and Rockwell B Scales

VPN ROCKWELL SCALES BRINELL SCLERO-
SCOPE
U.T.S.
DPH
HV/10
A B C D E F G H K 15N 30N 45N 15T 30T 45T BHN
500kg
BHN
3000kg

Kpsi Mpa
1865 92
80 87




97 92 87







1787 92
79 86




96 92 87







1710 91
78 85




96 91 86







1633 91
77 84




96 91 85







1556 90
76 83




96 90 84







1478 90
75 83




95 89 83







1400 89
74 82




95 89 82







1323 89
73 81




95 88 81







1245 88
72 80




95 87 80







1160 87
71 80




94 87 79







1076 87
70 79




94 86 78




101

1004 86
69 78




94 85 77




99

940 86
68 77




93 84 75




97

900 85
67 76




93 84 74




95

865 85
66 75




93 83 73




92

832 84
65 75




92 82 72



739 91

800 84
64 74




92 81 71



722 88

772 83
63 73




91 80 70



705 87

746 83
62 72




91 79 69



688 85

720 82
61 72




91 79 68



670 83

697 81
60 71




90 78 67



654 81 320 2206
674 81
59 70




90 77 66



634 80 310 2137
653 80
58 69




89 76 64



615 78 300 2069
633 80
57 69




89 75 63



595 76 290 2000
613 79
56 68




88 74 62



577 75 282 1944
595 79 120 55 67




88 73 61



560 74 274 1889
577 78 120 54 66




87 72 60



543 72 266 1834
560 78 119 53 65




87 71 59



523 71 257 1772
544 77 119 52 65




86 70 57



512 69 245 1689
528 77 118 51 64




86 69 56



496 68 239 1648
513 76 117 50 63




86 69 55



481 67 233 1607
498 75 117 49 62




85 68 54



469 66 227 1565
484 75 116 48 61




85 67 53



455 64 221 1524
471 74 116 47 61




84 66 51



443 63 217 1496
458 74 115 46 60




84 65 50



432 62 212 1462
446 73 115 45 59




83 64 49



421 60 206 1420
434 73 114 44 59




83 63 48



409 58 200 1379
423 72 113 43 58




82 62 47



400 57 196 1351
412 72 113 42 57




82 61 46



390 56 191 1317
402 71 112 41 56




81 60 44



381 55 187 1289
392 71 112 40 55




80 60 43



371 54 182 1255
382 70 111 39 55




80 59 42



362 52 177 1220
372 70 110 38 54




79 58 41



353 51 173 1193
363 69 110 37 53




79 57 40



344 50 169 1165
354 69 109 36 52




78 56 38



336 49 165 1138
345 68 109 35 52




78 55 37



327 48 160 1103
336 68 108 34 51




77 54 36



319 47 156 1076
327 67 108 33 50




77 53 35



311 46 152 1048
318 67 107 32 49




76 52 34



301 44 147 1014
310 66 106 31 48

91

76 51 33



294 43 144 993
302 66 105 30 48

91

75 50 31



286 42 140 965
294 65 104 29 47

89

75 50 30



279 41 137 945
286 65 104 28 46

88

74 49 29



271 41 133 917
279 64 103 27 45

87

73 48 28



264 40 129 889
272 64 103 26 45

86

73 47 27



258 39 126 869
266 63 102 25 44

85

72 46 26



253 38 124 855
260 63 101 24 43

84

72 45 24



247 37 121 834
254 62 100 23 42

83

71 44 23 93 82 72 201 240 36 118 814
248 62 99 22 42

81

71 43 22 93 82 71 195 234 35 115 793
243 61 98 21 41

79

70 42 21 93 81 70 189 228 35 112 772
238 61 97 20 40

78

69 42 20 92 81 69 184 222 34 109 752
234 60 97 19


77




92 80 69 181 218 34 107 738
230 59 96 18


76




92 80 68 179 214 33 106 731
226 59 96 17


75




92 80 68 177 210 33 104 717
222 58 95 16


74




92 79 67 175 208 32 102 703
217 58 95 15


73




92 79 67 171 205 31 100 690
213 58 94 14


73




91 79 66 169 203 31 99 683
208 57 93 13


71




91 78 66 167 200 30 98 676
204 57 92 12


70
100


91 78 65 163 195 30 96 662
200 56 92 11


69
100


91 77 64 162 193 29 95 655
196 56 91 10


68
100


90 77 64 160 190 28 93 641
192 56 90 9


66
99


90 76 63 157 185 27 91 627
188 55 89 8


64
98


90 76 62 154 180 26 88 607
184 54 88 7


63
97


90 75 61 151 176 26 86 593
180 54 87 6


61
97


89 75 60 148 172 26 84 579
176 53 86 5


59
96


89 74 59 145 169 25 83 572
172 53 85 4


58
95


89 74 58 142 165 25 81 558
168 52 84 3


56
94


88 73 57 140 162 25 79 545
164 51 83 2


54
93


88 72 56 137 159 24 78 538
160 51 82 1


53
92


88 72 55 135 156 24 76 524
156 50 81 0


51
91


87 71 54 133 153 24 75 517
152 50 80



49
91


87 70 53 130 150
73 503
148 49 79



48
90


87 70 52 128 147


144 49 78



46
89


86 69 51 126 144


141 48 77



44
88


86 68 50 124 141


139 47 76



43
87


86 68 49 122 139


137 47 75


100 41
86


85 67 49 120 137


135 46 74


99 39
85


85 66 48 118 135


132 46 73


99 38
85


85 66 47 116 132


130 45 72


98 36
84


84 65 46 114 130


127 45 71

100 98 35
83


84 64 45 112 127


125 44 70

100 97 33
82


84 64 44 110 125


123 44 69

99 96 31
81


83 63 43 109 123


120 43 68

98 96 30
80


83 62 42 107 121


118 43 67

98 95 28
79


83 62 41 106 119


116 42 66

97 95 27
78


82 61 40 104 117


115 42 65

96 94 25
78


82 60 39 102 116


114 42 64

96 94 24
77


82 60 38 101 114


113 41 63

95 93 22
76


81 59 37 99 112


112 41 62

95 92 21
75


81 58 36 98 110


111 40 61

94 92 19
74


81 57 35 96 108


110 40 60

93 91 18
73


81 57 34 95 107


108 39 59

93 91 16
72


80 56 32 94 106


107 39 58

92 90 15
71


80 55 31 92 104


106 38 57

91 90 13
71


80 55 30 91 102


105 38 56

91 89 12
70


79 54 29 90 101


104 38 55

90 88 10
69


79 53 28 89 99


103 37 54

90 88 9
68


79 53 27 87



102 37 53

89 87 7
67


78 52 26 86



101 36 52

88 87 6
66


78 51 25 85



100 36 51

88 86 4
65


78 51 24 84



100 35 50

87 86 3
65


77 50 23 83



99 35 49

87 85

64


77 49 22 82



98 35 48

86 85

63


77 49 21 81



97 34 47

85 84

62


76 48 20 80



96 34 46

85 83

61


76 47 19 79



95 33 45

84 83

60


76 46 18 79



95 33 44

84 82

59


75 46 17 78



94 32 43

83 82

58


75 45 16 77



93 32 42

82 81

58


75 44 15 76



92 31 41

82 81

57


74 44 14 75



91 31 40

81 80

56


74 43 13 74



90 31 39

80 79

55


74 42 11 74



90 30 38

80 79

54


73 42 10 73



89 30 37

79 78

53


73 41 9 72



88 29 36

79 78
100 52


73 40 8 71



88 29 35

78 77
100 52


72 40 7 71



87 28 34

77 77
99 51


72 39 6 70



87 28 33

77 76
99 50


72 38 5 69



86 28 32

76 75
99 49


71 38 4 68



86 27 31

76 75
98 48


71 37 3 68



85 27 30

75 74
98 47


71 36 2 67



85 26 29

74 74
98 46


70 36 1 66



84 26 28

74 73
97 45


70 35
66



84 25 27

73 73
97 45


70 34
65



83 25 26

73 72
97 44


69 33
65



83 24 25

72 71
96 42


69 33
64



82 24 24

71 71
96 42


69 32
64



82 24 23

71 70
96 41


68 31
63



81 23 22

70 70
95 40


68 31
63



81 23 21

70 69
95 39


68 30
62



80 22 20

69 69
95 38


68 29
62



80 22 19

68 68
94 38


67 29
61



79 21 18

68 67
94 37


67 28
61



79 21 17

67 67
93 36


67 27
60



78 21 16

67 66
93 35


66 26
60



78 20 15

66 66
93 34


66 26
59



77
14

65 65
92 33


66 25
59



77
13

65 65
92 32


65 24
58



76
12

64 64
92 32


65 24
58



76
11

64 64
91 31


65 23
57



75
10

63 63
91 30


64 22
57



75
9

62 62
91 29


64 22
56



74
8

62 62
90 28


64 21
56



74
7

61 61
90 27


63 20
56



73
6

61 61
90 26


63 20
55



73
5

60 60
89 26


63 19
55



72
4

59 60
89 25


62 18
55



72
3

59 59
88 24


62 17
54



71
2

58 58
88 23


62 17
54



71
1

58 58
88 22


61 16
53



70
0

57 57
87 21


61 15
53



DPH
HV/10
A B C D E F G H K 15N 30N 45N 15T 30T 45T BHN
500kg
BHN
3000kg

Kpsi Mpa
VPN ROCKWELL SCALES BRINELL SCLERO-
SCOPE
U.T.S.






Hardness Conversion or Equivalents:

Hardness conversion between different methods and scales cannot be made mathematically exact for a wide range of materials. Different loads, different shape of indenters, homogeneity of specimen, cold working properties and elastic properties all complicate the problem. All tables and charts should be considered as giving approximate equivalents, particularly when converting to a method or scale which is not physically possible for the particular test material and thus cannot be verified. An example would be converting HV/10 or HR-15N value on a thin coating to the HRC equivalent.

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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