The Perfect Oilless SGO
| Rockwell C scale Hardness (HRC) ③ |
Vicker’s hardness (HV) |
Brinell hardness (HB) Load 3000kgf 10mm ball |
Rockwell hardness ③ | Shore hardness (HS) | Tensile strength (approximate value) MPa (Kgf/mm2) ② |
|||
|---|---|---|---|---|---|---|---|---|
| Standard ball | Carbide Ball | A scale | B scale | D scale | ||||
| Load 60kgf | Load 100kgf | Load 100kgf | ||||||
| Diamond | Diameter 1.6mm | Diamond | ||||||
| Conical indenter | (1/16inch) | Conical indenter | ||||||
| (HRA) | Ball | (HRD) | ||||||
| (HRB) | ||||||||
| 38 | 372 | 353 | 353 | 69.4 | - | 53.8 | 51 | 1180 (120) |
| 37 | 363 | 344 | 344 | 68.9 | - | 53.1 | 50 | 1160 (118) |
| 36 | 354 | 336 | 336 | 68.4 | (109.0) | 52.3 | 49 | 1115 (114) |
| 35 | 345 | 327 | 327 | 67.9 | (108.5) | 51.5 | 48 | 1080 (110) |
| 34 | 336 | 319 | 319 | 67.4 | (108.0) | 50.8 | 47 | 1055 (108) |
| 33 | 327 | 311 | 311 | 66.8 | (107.5) | 50 | 46 | 1025 (105) |
| 32 | 318 | 301 | 301 | 66.3 | (107.0) | 49.2 | 44 | 1000 (102) |
| 31 | 310 | 294 | 294 | 65.8 | (106.0) | 48.4 | 43 | 980 (100) |
| 30 | 302 | 286 | 286 | 65.3 | (105.5) | 47.7 | 42 | 950 (97) |
| 29 | 294 | 279 | 279 | 64.7 | (104.5) | 47.0 | 41 | 930 (95) |
| 28 | 286 | 271 | 271 | 64.3 | (104.0) | 46.1 | 41 | 910 (93) |
| 27 | 279 | 264 | 264 | 63.8 | (103.0) | 45.2 | 40 | 880 (90) |
| 26 | 272 | 258 | 258 | 63.3 | (102.5) | 44.6 | 38 | 860 (88) |
| 25 | 266 | 253 | 253 | 62.8 | (101.5) | 43.8 | 38 | 840 (86) |
| 24 | 260 | 247 | 247 | 62.4 | (101.0) | 43.1 | 37 | 825 (84) |
| 23 | 254 | 243 | 243 | 62.0 | 100.0 | 42.1 | 36 | 805 (82) |
| 22 | 248 | 237 | 237 | 61.5 | 99.0 | 41.6 | 35 | 785 (80) |
| 21 | 243 | 231 | 231 | 61.0 | 95.5 | 40.9 | 35 | 770 (79) |
| 20 | 238 | 226 | 226 | 60.5 | 97.8 | 40.1 | 34 | 760 (77) |
| (18) | 230 | 219 | 219 | - | 96.7 | - | 33 | 730 (75) |
| (16) | 222 | 212 | 212 | - | 95.5 | - | 32 | 705 (72) |
| (14) | 213 | 203 | 203 | - | 93.9 | - | 31 | 675 (69) |
| (12) | 204 | 194 | 194 | - | 92.3 | - | 29 | 650 (66) |
| (10) | 196 | 187 | 187 | - | 90.7 | - | 28 | 620 (63) |
| (8) | 188 | 179 | 179 | - | 89.5 | - | 28 | 600 (61) |
| (6) | 180 | 171 | 171 | - | 87.1 | - | 28 | 580 (59) |
| (4) | 173 | 165 | 165 | - | 85.5 | - | 25 | 550 (56) |
| (2) | 166 | 158 | 158 | - | 83.5 | - | 24 | 530 (54) |
| (0) | 160 | 152 | 152 | - | 81.7 | - | 24 | 515 (53) |