Hardness Conversion Table

Brinell Hardness Rockwell Hardness Steel
Tungsten Carbide
Ball 3000 kg 		A Scale
60 kg 		B Scale
100 kg 		C Scale
150 kg 		Tensile Stength
(approx.) PSI
-86-68 -
-85-68-
- 85 - 67 -
767 85 - 66 -
757 84 - 66 -
745 84 - 65 -
733 84 - 65 -
722 83 - 64 -
712 - - - -
710 83 - 63 -
698 83 - 62 -
684 82 - 62 -
682 82 - 62 -
670 82 - 61 -
656 81 - 60 -
653 81 - 60 -
647 81 - 60 -
638 81 - 59 329,000
630 81 - 59 324,000
627 80 - 59 323,000
601 80 - 57 309,000
578 79 - 56 297,000
555 78 - 55 285,000
534 78 - 54 274,000
514 77 - 52 263,000
495 76 - 51 253,000
477 76 - 50 243,000
461 75 - 48 235,000
444 74 - 47 225,000
429 73 - 46 217,000
415 73 - 44 210,000
401 72 - 43 202,000
388 71 - 42 195,000
375 71 - 40 188,000
363 70 - 39 182,000
352 69 - 38 176,000
341 69 - 37 170,000
331 68 - 36 166,000
321 68 - 34 160,000
311 67 - 33 155,000
302 66 - 32 150,000
293 66 - 31 145,000
285 65 - 30 141,000
277 65 - 29 137,000
269 64 - 28 133,000
262 64 - 27 129,000
255 63 - 25 126,000
248 62 - 24 122,000
241 62 100 23 118,000
235 61 99 22 115,000
229 61 98 20 111,000
223 - 97 20 -
217 - 96 18 105,000
212 - 96 17 102,000
207 - 95 16 100,000
201 - 94 15 98,000
197 - 93 - 95,000
192 - 92 - 93,000
187 - 91 - 90,000
183 - 90 - 89,000
179 - 89 - 87,000
174 - 88 - 85,000
170 - 87 - 83,000
167 - 86 - 81,000
163 - 85 - 79,000
156 - 83 - 76,000
149 - 81 - 73,000
143 - 79 - 71,000
137 - 76 - 67,000
131 - 74 - 65,000
126 - 72 - 63,000
121 - 70 - 60,000
116 - 68 - 58,000
111-66-56,000
  
Mid-States


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