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Nickel

Approximate Hardness Conversion Numbers for
Nickel & High-Nickel Alloys

Vicker’s Hardness Number (HV) Brinell Hardness No. 10mm Standard Ball, 3000 Kgf (HBS) Rockwell Hardness Number A Scale, 60 Kgf (HRA) Rockwell Hardness Number B Scale, 100 Kgf (HRB) Rockwell Hardness Number C Scale, 150 Kgf (HRC) Rockwell Hardness Number D Scale, 100 Kgf (HRD) Rockwell Hardness Number E Scale, 100 Kgf (HRE)
513 75.5 50 63
481 450 74.5 48 61.5
452 425 73.5 46 60
427 403 72.5 44 58.5
404 382 71.5 42 57
382 363 70.5 40 55.5
362 346 69.5 38 54
344 329 68.5 36 52.5
326 313 67.5 34 50.5
309 298 66.5 32 49.5
285 275 64.5 28.5 46.5
266 258 63 25.5 44.5
248 241 61.5 100 22.5 42
234 228 60.5 98 20 40
220 215 59 96 38
209 204 57.5 94 36
198 194 56.5 92 34
188 184 55 90 32
179 176 53.5 88 30
171 168 52.5 86 28
164 161 51.5 84 26.5
157 155 50 82 24.5
151 149 49 80 22.5
145 144 47.5 78 21
140 139 46.5 76 -19 99.5

 

Rockwell Hardness Number F Scale, 600 Kgf (HRF) Rockwell Superficial Hardness No. 15N Scale, 15 Kgf (15N) Rockwell Superficial Hardness No. 30N Scale, 30 Kgf (30N) Rockwell Superficial Hardness No. 45N Scale, 45 Kgf (45N) Rockwell Superficial Hardness No. 15T Scale, 15 Kgf (15T) Rockwell Superficial Hardness No. 30T Scale, 30 Kgf (30T) Rockwell Superficial Hardness No. 45T Scale, 45 Kgf (45T)
85.5 68 54.5
84.5 66.5 52.5
83.5 64.5 50
82.5 63 47.5
81.5 61 45.5
80.5 59.5 43
79.5 58 41
78.5 56 38.5
77.5 54.5 36
76.5 52.5 34 94.5 85.5 77
75 49.5 30 94 84.5 75
73.5 47 26.5 93 83 73
72 44.5 23 92.5 81.5 71
70.5 42 20 92 80.5 69
69 39.5 17 91 79 67
68 37.5 14 90.5 77.5 65
66.5 35.5 11 89.5 76 63
65 32.5 7.5 89 75 61
64 30.5 5 88 73.5 59.5
62.5 28.5 2 87.5 72 57.5
61.5 26.5 87 70.5 55.5
86 69.5 53.5
85.5 68 51.5
84.5 66.5 49.5
99.5 84 65.5 47.5