Equivalência de dureza – ASTM E140 – 05 (Tabela 2)

Equivalência de dureza – ASTM E140 – 05 (Tabela 2)
Rockwell Superficial Hardness Number
Rockwell B Hardness
Number
100 kgf
(HRB)
100
15 -T
SCALE,
15-kgf
(HR 15-T)
93.1
30-T
SCALE,
30-kgf
(HR 30-T)
83.1
45-T
SCALE,
45-kgf
(HR 45-T)
72.9
Vickers Hardness
Number
(HV)
99
92.8
82.5
71.9
234
98
92.5
81.8
70.9
228
97
92.1
81.1
69.9
222
96
91.8
80.4
68.9
216
95
91.5
79.8
67.9
210
94
91.2
79.1
66.9
205
93
90.8
78.4
65.9
200
92
90.5
77.8
64.8
195
91
90.2
77.1
63.8
190
90
89.9
76.4
62.8
185
89
89.5
75.8
61.8
180
88
89.2
75.1
60.8
176
87
89.9
74.4
59.8
172
86
88.6
73.8
58.8
169
85
88.2
73.1
57.8
165
84
87.9
72.4
56.8
162
83
87.6
71.8
55.8
159
82
87.3
71.1
54.8
156
81
86.9
70.4
53.8
153
80
86.6
69.7
52.8
150
79
86.3
69.1
51.8
147
78
86.0
68.4
50.8
144
77
85.6
67.7
49.8
141
76
85.3
67.1
48.8
139
75
85.0
66.4
47.8
137
74
84.7
65.7
46.8
135
73
84.3
65.1
45.8
132
72
84.0
64.4
44.8
130
71
83.7
63.7
43.8
127
70
83.4
63.1
42.8
125
69
83.0
62.4
41.8
123
68
82.7
61.7
40.8
121
67
82.4
61.0
39.8
119
66
82.1
60.4
38.7
117
65
81.8
59.7
37.7
116
64
81.4
59.0
36.7
114
63
81.1
58.4
35.7
112
62
80.8
57.7
34.7
110
61
80.5
57.0
33.7
108
60
80.1
56.4
32.7
107
240
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