Hardness Conversion Chart

Brinell Hardness Rockwell Hardness Tensile Strength (Approx.)
Tungsten Carbide Ball 3000 KG A Scale 60KG B Scale 100KG C Scale 150KG
85.6 68.0
85.3 67.5
85.0 67.0
767 84.7 66.4
757 84.4 65.9
745 84.1 65.3
733 83.8 64.7
722 83.4 64.0
712
710 83.0 63.3
698 82.6 62.5
684 82.2 61.8
682 82.2 61.7
670 81.8 61.0
656 81.3 60.1
653 81.2 60.0
647 81.1 59.7
638 80.8 59.2 329,000
630 80.6 58.8 324,000
627 80.5 58.7 323,000
601 79.8 57.3 309,000
578 79.1 56.0 297,000
555 78.4 54.7 285,000
534 77.8 53.5 274,000
514 76.9 52.1 263,000
495 76.3 51.0 253,000
477 75.6 49.6 243,000
461 74.9 48.5 235,000
444 74.2 47.1 225,000
429 73.4 45.7 217,000
415 72.8 44.5 210,000
401 72.0 43.1 202,000
388 71.4 41.8 195,000
375 70.6 40.4 188,000
363 70.0 39.1 182,000
352 69.3 37.9 176,000
341 68.7 36.6 170,000
331 68.1 35.5 166,000
321 67.5 34.3 160,000
311 66.9 33.1 155,000
302 66.3 32.1 150,000
293 65.7 30.9 145,000
285 65.3 29.9 141,000
277 64.6 28.8 137,000
269 64.1 27.6 133,000
262 63.6 26.6 129,000
255 63.0 25.4 126,000
248 62.5 24.2 122,000
241 61.8 100.0 22.8 118,000
235 61.4 99.0 21.7 115,000
229 60.8 98.2 20.5 111,000
223 97.3 20.0
217 96.4 18.0 105,000
212 95.5 17.0 102,000
207 94.6 16.0 100,000
201 93.8 15.0 98,000
197 92.8 95,000
192 91.9 93,000
187 90.7 90,000
183 90.0 89,000
179 89.0 87,000
174 87.8 85,000
170 86.8 83,000
167 86.0 81,000
163 85.0 79,000
156 82.9 76,000
149 80.8 73,000
143 78.7 71,000
137 76.4 67,000
131 74.0 65,000
126 72.0 63,000
121 69.8 60,000
116 67.6 58,000
111 65.7 56,000