Обяснение на термините HRA, HRC, HV
1, Свредлото HRA е 120+-0,5° диамантено конично тяло, с горна кривина 0,2+-0,002 mm и натоварване от 60 кг.
2, HRC свредлото е 120+-0,5° диамантено конично тяло, с горна кривина 0,2+-0,002 mm и натоварване от 150 кг
3，HV диагонална повърхност на 136° четириъгълна пирамида с диамантено свредло, стойността на твърдостта е специфичното налягане върху площта на единицата за вдлъбнатина, натоварването е 50/100 грама сила, площта на вдлъбнатината е няколко um, стойността е kg/mm
| HV | HRC | HRA | HV | HRC | HRA | HV | HRC | HRA |
| 1700.0 | 80.5 | 92.5 | 528.0 | 51,0 | 76,0 | 31.0 | 66,0 | |
| 1600.0 | 80,0 | 92,0 | 513.0 | 50,0 | 76,0 | 301.0 | 30,0 | 66,0 |
| 1550.0 | 79,0 | 91.5 | 498.0 | 49,0 | 76,0 | 29.0 | 65,0 | |
| 1500.0 | 78,0 | 91,0 | 48.5 | 75,0 | 28.5 | 65,0 | ||
| 1450.0 | 77,0 | 90.5 | 485.0 | 48,0 | 75,0 | 285.0 | 28,0 | 65,0 |
| 1400.0 | 76,0 | 90,0 | 47.5 | 74.5 | 27.5 | 64.5 | ||
| 1350.0 | 75,0 | 89.5 | 471.0 | 47,0 | 74,0 | 27,0 | 64,0 | |
| 1300.0 | 74,0 | 89,0 | 458.0 | 46,0 | 73.5 | 26.5 | 64,0 | |
| 1250.0 | 73,0 | 88.5 | 45,0 | 73,0 | 271.0 | 26.0 | 64,0 | |
| 1200.0 | 72,0 | 88,0 | 446.0 | 44.5 | 73,0 | 25.5 | 63.5 | |
| 1150.0 | 71.5 | 87.5 | 435.0 | 44,0 | 73,0 | 25,0 | 63,0 | |
| 1140.0 | 71,0 | 87,0 | 43.5 | 72.5 | 24.5 | 63,0 | ||
| 1076.0 | 70,0 | 86.5 | 43,0 | 72,0 | 257.0 | 24.0 | 62.5 | |
| 1004.0 | 69,0 | 86,0 | 413.0 | 42,0 | 72,0 | 23.5 | 62,0 | |
| 942.0 | 68,0 | 85.8 | 41.5 | 71.5 | 23.0 | 62,0 | ||
| 894.0 | 67,0 | 85,0 | 41,0 | 71,0 | 22.5 | 62,0 | ||
| 854.0 | 66,0 | 84.5 | 40.5 | 70.5 | 22.0 | 62,0 | ||
| 820.0 | 65,0 | 84,0 | 393.0 | 40,0 | 70.5 | 21.5 | 61.5 | |
| 789.0 | 64,0 | 83.5 | 39.5 | 70,0 | 21.0 | 61,0 | ||
| 763.0 | 63,0 | 83,0 | 39,0 | 70,0 | 20.5 | 61,0 | ||
| 739.0 | 62,0 | 82.5 | 38.5 | 69.5 | 236.0 | 20.0 | 61,0 | |
| 716.0 | 61,0 | 82,0 | 373.0 | 38,0 | 69,0 | 223.0 | 19.5 | 60.5 |
| 695.0 | 60,0 | 81.5 | 37.5 | 69,0 | 217.0 | 19.0 | 60,0 | |
| 675.0 | 59,0 | 81,0 | 37,0 | 69,0 | 18.5 | 60,0 | ||
| 655.0 | 58,0 | 80.5 | 36.5 | 68.5 | 209.0 | 18.0 | 60,0 | |
| 636.0 | 57,0 | 80,0 | 353.0 | 36,0 | 68,0 | 205.0 | 60,0 | |
| 56.5 | 79.5 | 35.5 | 68,0 | 197.0 | 59,0 | |||
| 617.0 | 56,0 | 79,0 | 35,0 | 67.5 | 195.0 | 58,0 | ||
| 598.0 | 55,0 | 78,0 | 334.0 | 34.5 | 67,0 | 191.0 | 57.5 | |
| 580.0 | 54,0 | 78,0 | 34,0 | 67,0 | 186.0 | 56,0 | ||
| 562.0 | 53,0 | 78,0 | 33.5 | 67,0 | ||||
| 545.0 | 52,0 | 77,0 | 317.0 | 32,0 | 67,0 | |||
| 51.5 | 76.5 | 31.5 | 66,0 |
Време на публикуване: 18 април 2024 г