Hardness Conversion Brinell Hardness Rockwell Hardness Tensile Strength Tungsten Carbide Ball 3000 KG A Scale 60KG B Scale 100KG C Scale 150KG (Approx.) - 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   Brinell Hardness Rockwell Hardness Tensile Strength Tungsten Carbide Ball 3000 KG A Scale 60KG B Scale 100KG C Scale 150KG (Approx.) 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
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