Tinius Olsen

Brinell-Hardness Chart

Brinell Hardness Numbers:
Diameter of Ball, 10 Millimeters

Diameter of Ball Impression (mm)	Brinell Hardness Number for a Kilogram Load of:
Diameter of Ball Impression (mm)	500	1000	1500	2000	2500	3000
2.00 2.05 2.10 2.15 2.20	158 150 143 136 130	316 300 286 272 260	473 450 428 408 390	632 600 572 544 520	788 750 714 681 650	945 899 856 817 780
2.25 2.30 2.35 2.40 2.45	124 119 114 109 104	248 238 228 218 208	372 356 341 327 313	496 476 456 436 416	621 593 568 545 522	745 712 682 653 627
2.50 2.55 2.60 2.65 2.70	100 96.3 92.6 89.0 85.7	200 193 185 178 171	301 289 278 267 257	400 385 370 356 343	500 482 462 445 429	601 578 555 534 514
2.75 2.80 2.85 2.90 2.95	82.6 79.6 76.8 74.1 71.5	165 159 154 148 143	248 239 230 222 215	330 318 307 296 286	413 398 384 371 358	495 477 461 444 429
3.00 3.05 3.10 3.15 3.20	69.1 66.8 64.6 62.5 60.5	138 134 129 125 121	207 200 194 188 182	276 267 258 250 242	346 334 324 313 303	415 401 388 375 363
3.25 3.30 3.35 3.40 3.45	58.6 56.8 55.1 53.4 51.8	117 114 110 107 104	176 170 165 160 156	234 227 220 214 207	293 284 276 267 259	352 341 331 321 311
3.50 3.55 3.60 3.65 3.70	50.3 48.9 47.5 46.1 44.9	101 97.8 95.0 92.2 89.8	151 147 142 138 135	201 196 190 184 180	252 244 238 231 225	302 293 285 277 269
3.75 3.80 3.85 3.90 3.95	43.6 42.4 41.3 40.2 39.1	87.2 84.8 82.6 80.4 78.2	131 127 124 121 117	174 170 165 161 156	218 212 207 201 196	262 255 248 241 235
4.00 4.05 4.10 4.15 4.20	38.1 37.1 36.2 35.3 34.4	76.2 74.2 72.4 70.6 68.8	114 111 109 106 103	152 148 145 141 138	191 186 181 177 172	229 223 217 212 207
4.25 4.30 4.35 4.40 4.45	33.6 32.8 32.0 31.2 30.5	67.2 65.6 64.0 62.4 61.0	101 98.3 95.9 93.6 91.4	134 131 128 125 122	167 164 160 156 153	201 197 192 187 183
4.50 4.55 4.60 4.65 4.70	29.8 29.1 28.4 27.8 27.1	59.6 58.2 56.8 55.6 54.2	89.3 87.2 85.2 83.3 81.4	119 116 114 111 108	149 145 142 139 136	179 174 170 167 163
4.75 4.80 4.85 4.90 4.95	26.5 25.9 25.4 24.8 24.3	53.0 51.8 50.8 49.6 48.6	79.6 77.8 76.1 74.4 72.8	106 104 102 99.2 97.2	133 130 127 124 122	159 156 152 149 146
5.00 5.05 5.10 5.15 5.20	23.8 23.3 22.8 22.3 21.8	47.6 46.6 45.6 44.6 43.6	71.3 69.8 68.3 66.9 65.5	95.2 93.2 91.2 89.2 87.2	119 117 114 112 109	143 140 137 134 131
5.25 5.30 5.35 5.40 5.45	21.4 20.9 20.5 20.1 19.7	42.8 41.8 41.0 40.2 39.4	64.1 62.8 61.5 60.3 59.1	85.6 83.6 82.0 80.4 78.8	107 105 103 101 98.5	128 126 123 121 118
5.50 5.55 5.60 5.65 5.70	19.3 18.9 18.6 18.2 17.8	38.6 37.8 37.2 36.4 35.6	57.9 56.8 55.7 54.6 53.5	77.2 75.6 74.4 72.8 71.2	96.5 95.0 92.5 90.8 89.2	116 114 111 109 107
5.75 5.80 5.85 5.90 5.95	17.5 17.2 16.8 16.5 16.2	35.0 34.4 33.6 33.0 32.4	52.5 51.5 50.5 49.6 48.7	70.0 68.8 67.2 66.0 64.8	87.5 85.8 84.2 82.5 81.2	105 103 101 99.2 97.3
6.00 6.05 6.10 6.15 6.20	15.9 15.6 15.3 15.1 14.8	31.8 31.2 30.6 30.2 29.6	47.7 46.8 46.0 45.2 44.3	63.6 62.4 61.2 60.4 59.2	79.5 78.0 76.7 75.3 73.8	95.5 93.7 92.0 90.3 88.7
6.25 6.30 6.35 6.40 6.45	14.5 14.2 14.0 13.7 13.5	29.0 28.4 28.0 27.4 27.0	43.5 42.7 42.0 41.2 40.5	58.0 56.8 56.0 54.8 54.0	72.6 71.3 70.0 68.8 67.5	87.1 85.5 84.0 82.5 81.0