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Hardness Conversion Chart

Content provided by Tech Steel & Materials.

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