Hardness Conversion
Willie Washer offers a full range of hardened washers, not just the standard F436. We can heat treat to your most exact specifications, whether you need through hardened special alloys, or case hard low carbon steel.
C 150 kg | A 60 kg | 15N 15 kg N | 30N 30 kg N | Vickers 10 kg 136 Diamond | Knoop 500 gr over | HB 3000 kg HV 10kg | Tensil Strength ksi |
70 | 86.5 | 94.0 | 86.0 | 1076 | 972 | - | - |
69 | 86.0 | 93.5 | 85.0 | 1004 | 946 | - | - |
68 | 85.6 | 93.2 | 84.4 | 940 | 920 | - | - |
67 | 85.0 | 92.9 | 83.6 | 900 | 895 | - | - |
66 | 84.5 | 92.5 | 82.8 | 865 | 870 | - | - |
65 | 83.9 | 92.2 | 81.9 | 832 | 846 | - | - |
64 | 83.4 | 91.8 | 81.1 | 800 | 822 | - | - |
63 | 82.8 | 91.4 | 80.1 | 772 | 799 | - | - |
62 | 82.3 | 91.1 | 79.3 | 746 | 776 | - | - |
61 | 81.8 | 90.7 | 78.4 | 720 | 754 | - | - |
60 | 81.2 | 90.2 | 77.5 | 697 | 732 | - | - |
59 | 80.7 | 89.8 | 76.6 | 674 | 710 | 634 | 351 |
58 | 80.1 | 89.3 | 75.7 | 653 | 690 | 615 | 338 |
57 | 79.6 | 88.9 | 74.8 | 633 | 670 | 595 | 325 |
56 | 79.0 | 88.3 | 73.9 | 613 | 650 | 577 | 313 |
55 | 78.5 | 87.9 | 73.0 | 595 | 630 | 560 | 301 |
54 | 78.0 | 87.4 | 72.0 | 577 | 612 | 543 | 292 |
53 | 77.4 | 86.9 | 71.2 | 560 | 594 | 525 | 283 |
52 | 76.8 | 86.4 | 70.2 | 544 | 576 | 512 | 273 |
51 | 76.3 | 85.9 | 69.4 | 528 | 558 | 496 | 264 |
50 | 75.9 | 85.5 | 68.5 | 513 | 542 | 481 | 255 |
49 | 75.2 | 85.0 | 67.6 | 498 | 526 | 469 | 246 |
48 | 74.7 | 84.5 | 66.7 | 484 | 510 | 451 | 238 |
47 | 74.1 | 83.9 | 65.8 | 471 | 495 | 442 | 229 |
46 | 73.6 | 83.5 | 64.8 | 458 | 480 | 432 | 221 |
45 | 73.1 | 83.0 | 64.0 | 446 | 466 | 421 | 215 |
44 | 72.5 | 82.5 | 63.1 | 434 | 452 | 409 | 208 |
42 | 71.5 | 81.5 | 61.3 | 412 | 426 | 390 | 194 |
40 | 70.4 | 80.4 | 59.5 | 392 | 402 | 371 | 182 |
38 | 69.4 | 79.4 | 57.7 | 372 | 380 | 353 | 171 |
36 | 68.4 | 78.3 | 55.9 | 354 | 360 | 336 | 161 |
34 | 67.4 | 77.2 | 54.2 | 336 | 342 | 319 | 152 |
32 | 66.3 | 76.1 | 52.1 | 318 | 326 | 301 | 146 |
30 | 65.3 | 75.0 | 50.4 | 302 | 311 | 286 | 138 |
28 | 64.3 | 73.9 | 48.6 | 286 | 297 | 271 | 131 |
26 | 63.3 | 72.8 | 46.8 | 272 | 284 | 258 | 125 |
24 | 62.4 | 71.6 | 45.0 | 260 | 272 | 247 | 119 |
22 | 61.5 | 70.5 | 43.2 | 248 | 261 | 237 | 115 |
20 | 60.5 | 69.4 | 41.5 | 238 | 251 | 226 | 110 |
B 100 kg 1/16 ball | F 60 kg 1/16 ball | 30 T 30 kg 1/16 ball | E 100 kg 1/8 ball | Knoop 500 gr & over | HB 3000 kg HV 10kg | Tensil Strength ksi |
100 | - | 83.1 | - | 251 | 240 | 116 |
99 | - | 82.5 | - | 246 | 234 | 112 |
98 | - | 81.8 | - | 241 | 228 | 109 |
97 | - | 81.1 | - | 236 | 222 | 106 |
96 | - | 80.4 | - | 231 | 216 | 103 |
95 | - | 79.8 | - | 226 | 210 | 101 |
94 | - | 79.1 | - | 221 | 205 | 98 |
93 | - | 78.4 | - | 216 | 200 | 96 |
92 | - | 77.8 | - | 211 | 195 | 93 |
91 | - | 77.1 | - | 206 | 190 | 91 |
90 | - | 76.4 | - | 201 | 185 | 89 |
89 | - | 75.8 | - | 196 | 180 | 87 |
88 | - | 75.1 | - | 192 | 176 | 85 |
87 | - | 74.4 | - | 188 | 172 | 83 |
86 | - | 73.8 | - | 184 | 169 | 81 |
85 | - | 73.1 | - | 180 | 165 | 80 |
84 | - | 72.4 | - | 176 | 162 | 78 |
83 | - | 71.8 | - | 173 | 159 | 77 |
82 | - | 71.1 | - | 170 | 156 | 75 |
81 | - | 70.4 | - | 167 | 153 | 74 |
80 | - | 69.7 | - | 164 | 150 | 72 |
79 | - | 69.1 | - | 161 | 147 | - |
78 | - | 68.4 | - | 158 | 144 | - |
77 | - | 67.7 | - | 155 | 141 | - |
76 | - | 67.1 | - | 152 | 139 | - |
75 | 99.6 | 66.4 | - | 150 | 137 | - |
74 | 99.1 | 65.7 | - | 147 | 135 | - |
72 | 98.0 | 64.4 | - | 143 | 130 | - |
70 | 96.8 | 63.1 | 99.5 | 139 | 125 | - |
68 | 95.6 | 61.7 | 98.0 | 135 | 121 | - |
66 | 94.5 | 60.4 | 97.0 | 131 | 117 | - |
64 | 93.4 | 59.0 | 95.5 | 127 | 114 | - |
62 | 92.2 | 57.7 | 94.5 | 124 | 110 | - |
60 | 91.1 | 56.4 | 93.0 | 120 | 107 | - |
58 | 90.0 | 55.0 | 92.0 | 117 | 104 | - |
56 | 88.8 | 53.7 | 90.5 | 114 | 101 | - |
54 | 87.7 | 52.4 | 89.5 | 111 | 87 | - |
52 | 86.5 | 51.0 | 88.0 | 109 | 85 | - |
50 | 85.4 | 49.7 | 87.0 | 107 | 83 | - |
48 | 84.3 | 48.3 | 85.5 | 105 | 81 | - |
46 | 83.1 | 47.0 | 84.5 | 103 | 79 | - |
44 | 82.0 | 45.7 | 83.5 | 101 | 78 | - |
42 | 80.8 | 44.3 | 82.0 | 99 | 76 | - |
40 | 79.7 | 43.0 | 81.0 | 97 | 74 | - |
38 | 78.6 | 41.6 | 79.5 | 95 | 73 | - |
36 | 77.4 | 40.3 | 78.5 | 93 | 71 | - |
34 | 76.3 | 39.0 | 77.0 | 91 | 70 | - |
32 | 75.2 | 37.6 | 75.0 | 89 | 68 | - |
30 | 74.0 | 36.3 | 75.0 | 87 | 67 | - |
28 | 73.0 | 34.5 | 73.5 | 85 | 66 | - |
24 | 70.5 | 32.0 | 71.0 | 82 | 64 | - |
20 | 68.5 | 29.0 | 68.5 | 79 | 62 | - |
16 | 66.0 | 26.0 | 66.5 | 76 | 60 | - |
12 | 64.0 | 23.5 | 64.0 | 73 | 58 | - |
8 | 61.5 | 20.5 | 61.5 | 71 | 56 | - |
4 | 59.5 | 18.0 | 59.0 | 69 | 55 | - |
0 | 57.0 | 15.0 | 57.0 | 67 | 53 | - |
