Hardness comparison table | |||||
Tensile Symbol | Brinell Hardness Number (BHN) | Vickers Pyramid Number (VPN) | Rockwell Number C. Scale | Equivalent Tensile Strength for Steel | |
Tons/sq.in | N/mm2 | ||||
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114 | 114 | -20 | 26 | ![]() |
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118 | 118 | -17 | 27 | ![]() |
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121 | 121 | -16 | 28 | ![]() |
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126 | 126 | -12 | 29 | ![]() |
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131 | 131 | -9 | 30 | ![]() |
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134 | 134 | -7 | 31 | ![]() |
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140 | 140 | -4 | 32 | ![]() |
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143 | 143 | -3 | 33 | ![]() |
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149 | 149 | -1 | 34 | ![]() |
P | 152 | 153 | 0 | 35 | 550 |
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156 | 156 | 1 | 36 | ![]() |
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167 | 166 | 4 | 37 | ![]() |
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174 | 174 | 7 | 39 | ![]() |
Q | 179 | 179 | 8 | 40 | 625 |
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183 | 183 | 9 | 41 | ![]() |
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187 | 187 | 10 | 42 | ![]() |
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192 | 192 | 12 | 43 | ![]() |
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197 | 197 | 13 | 44 | ![]() |
R | 201 | 202 | 15 | 45 | 700 |
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212 | 212 | 17 | 46 | ![]() |
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217 | 217 | 18 | 47 | ![]() |
S | 223 | 223 | 20 | 50 | 775 |
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229 | 229 | 21 | 51 | ![]() |
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235 | 235 | 22 | 52 | ![]() |
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241 | 241 | 23 | 53 | ![]() |
T | 248 | 248 | 24 | 55 | 850 |
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255 | 256 | 25 | 56 | ![]() |
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262 | 263 | 26 | 57 | ![]() |
U | 269 | 270 | 28 | 60 | 925 |
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277 | 279 | 29 | 61 | ![]() |
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285 | 287 | 30 | 62 | ![]() |
V | 293 | 296 | 31 | 65 | 1000 |
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302 | 305 | 32 | 68 | ![]() |
W | 311 | 316 | 33 | 70 | 1075 |
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321 | 327 | 34 | 71 | ![]() |
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331 | 339 | 35 | 72 | ![]() |
X | 341 | 350 | 36 | 75 | 1150 |
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352 | 363 | 37 | 76 | ![]() |
Y | 363 | 375 | 38 | 80 | 1225 |
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375 | 389 | 40 | 82 | ![]() |
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388 | 404 | 41 | 84 | ![]() |
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401 | 420 | 42 | 88 | ![]() |
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415 | 437 | 44 | 91 | ![]() |
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429 | 454 | 45 | 94 | ![]() |
Z | 444 | 472 | 46 | 100 | 1550 |