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Hardness Conversion

  B C  
Brinell Rockwell Rockwell Approximate
Tensile
653 - 62 324,000
627 - 60 311,000
601 - 59 306,000
578 - 57 290,000
555 - 56 284,000
534 - 54 270,000
514 - 53 263,000
495 - 51 250,000
477 - 50 243,000
461 - 49 236,000
444 - 47 223,000
429 - 47 217,000
415 - 45 211,000
401 - 42 194,000
388 - 41 188,000
375 - 40 182,000
363 - 38 171,000
352 - 37 166,000
331 - 36 162,000
321 - 34 153,000
311 - 33 148,000
302 - 32 144,000
293 - 31 140,000
285 - 30 136,000
277 - 29 132,000
269 - 28 129,000
262 - 27 126,000
255 - 25 120,000
248 - 24 117,000
241 100 23 115,000
235 99 22 112,000
229 98 21 110,000
223 97 20 108,000
  B  
Brinell Rockwell Approximate
Tensile
217 96 103,000
212 96 103,000
207 95 101,000
202 94 98,000
197 93 96,000
192 92 93,000
187 91 91,000
183 90 89,000
179 89 87,000
174 88 85,000
170 87 83,000
166 86 81,000
163 85 80,000
159 84 78,000
156 83 77,000
153 82 76,000
149 81 75,000
146 80 74,000
143 79 73,000
140 78 71,000
137 77 70,000
134 76 69,000
131 74 67,000
128 73 66,000
126 72 65,000
124 71 63,000
121 70 62,000
118 69 61,000
116 68 60,000
114 67 59,000
112 66 58,000
109 65 57,000
107 64 55,000

653 Brinell / 62 Rockwell C. Hardest > 107 Brinell / 64 Rockwell B. Softest

The information above is not warranted, guaranteed, or for design purposes.