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Hardness equivalents

Comparative table of approximate hardness values

Vickers Hardness Number Brinell Hardness Number Rockwell Hardness Number Rockwell Superficial Hardness Number
    B Scale C Scale 15-T  scale 30-T scale 45-T Scale
Vickers Indenter 1, 5, 10, 30-kgf  10-mm Standard Ball, 3000-kgf  100-kgf, 1/16" (1,588 mm) Ball 150-kgf Diamond Pene- trator 15-kgf, 1/16" (1,588 mm) Ball 30-kgf, 1/16" (1,588 mm) Ball 45-kgf, 1/16" (1,588 mm) Ball
HV HBS HRB HRC HR 15-T HR 30-T HR 45-T
513 479   50,0      
481 450   48,0      
452 425   46,0      
427 403   44,0      
404 382   42,0      
382 363   40,0      
362 346   38,0      
344 329   36,0      
326 313   34,0      
309 298 106 32,0 94,5 85,5 77,0
285 275 104 28,5 94,0 84,5 75,0
266 258 102 25,5 93,0 83,0 73,0
248 241 100 22,5 92,5 81,5 71,0
234 228 98 20,0 92,0 80,5 69,0
220 215 96 17,0 91,0 79,0 67,0
209 204 94 14,5 90,5 77,5 65,0
198 194 92 12,0 89,5 76,0 63,0
188 184 90 9,0 89,0 75,0 61,0
179 176 88 6,5 88,0 73,5 59,5
171 168 86 4,0 87,5 72,0 57,5
164 161 84 2,0 87,0 70,5 55,5
157 155 82   86,0 69,5 53,5
151 149 80   85,5 68,0 51,5
145 144 78   84,5 66,5 49,5
140 139 76   84,0 65,5 47,5
135 134 74   83,0 64,0 45,5
130 129 72   82,5 62,5 43,5
126 125 70   82,0 61,0 41,5
122 121 68   81,0 60,0 39,5
119 118 66   80,5 58,5 37,5
115 114 64   79,5 57,0 35,5
112 111 62   79,0 56,0 33,5
108 108 60   78,5 54,5 31,5
106 106 58   77,5 53,0 29,5
103 103 56   77,0 51,5 27,5
100 100 54   76,0 50,5 25,5
98 98 52   75,5 49,0 23,5
95 95 50   74,5 47,5 21,5

 

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