TECHNICAL INFORMATION
Anasayfa / Technical Information / Steel Hardness Cycle TableSTEEL HARDNESS CYCLE TABLE
The hardness of materials can be measured according to different measurement methods. The most widely used of these methods in the world are Brinell hardness test, Rockwell hardness test and Vickers hardness tests. You can examine the comparison of these different hardness tests among themselves and which value corresponds to which other value from the table below, and you can convert the hardness values in different tests to the value in another test. These hardness values are approximate values for materials considered to be heat treated. At the bottom of the page, there is summary information about What is HRC, What is HB and What is HV.
What is HRC?
HRC is a hardness measurement unit used in the hardness measurement of materials. This hardness unit, also known as "Rockwell", is a hardness unit calculated according to the increase rate of the depth of the first and second traces, which are formed when the material is first pressed with a certain small load with the help of a tip and then pressed again with a greater force.
What is HB?
HB, or more commonly called Brinell, is another fairly common hardness unit. During the measurement of this hardness unit, the hardness is calculated according to the difference in the surface area ratio of the trace left on the material surface after applying small and large force, not the depth of the trace.
What is HV?
HV, or more commonly known as Vickers hardness test, is one of the most widely used hardness measurement units. The Vickers test method is a hardness measurement method developed as an alternative to the Brinell test method. The advantage of this test method is that it can be used on almost all different materials and materials with different hardness. On the other hand, this hardness unit is not used as widely as Rockwell and Brinell.
- ÇELİK SERTLİK ÇEVRİM TABLOSU
HARDNESS CYCLE TABLE | |||||||||||||
Tensile Strength | Brinell Hardness Trace Diameter | Vickers Hardness | Rockwell Hardness | Tensile Strength | Brinell Hardness Trace Diameter | Vickers Hardness | Rockwell Hardness | ||||||
N/ mm² | d | HB | HV | HRB | HRC | HR 30 N | N/ mm² | d | HB | HV | HRB | HRC | HR 30 N |
265 | 6,63 | 76 | 80 | – | – | – | 1095 | 3,39 | 323 | 340 | – | 34,4 | 54,4 |
270 | 6,45 | 80,7 | 85 | 41 | – | – | 1125 | 3,34 | 333 | 350 | – | 35,5 | 55,4 |
285 | 6,3 | 85,5 | 90 | 48 | – | – | 1155 | 3,29 | 342 | 360 | – | 36,6 | 56,4 |
305 | 6,16 | 90,2 | 95 | 52 | – | – | 1190 | 3,26 | 352 | 370 | – | 37,7 | 57,4 |
320 | 6,01 | 95 | 100 | 56,2 | – | – | 1220 | 3,21 | 361 | 380 | – | 38,8 | 58,4 |
335 | 5,9 | 98,8 | 105 | – | – | – | 1225 | 3,17 | 371 | 390 | – | 39,8 | 59,3 |
350 | 5,75 | 105 | 110 | 62,3 | – | – | 1290 | 3,13 | 380 | 400 | – | 40,8 | 60,2 |
370 | 5,65 | 109 | 115 | – | – | – | 1320 | 3,09 | 390 | 410 | – | 41,8 | 61,1 |
385 | 5,54 | 114 | 120 | 66,7 | – | – | 1350 | 3,06 | 399 | 420 | – | 42,7 | 61,9 |
400 | 5,43 | 119 | 125 | – | – | – | 1385 | 3,02 | 409 | 430 | – | 43,6 | 62,7 |
415 | 5,33 | 124 | 130 | 71,2 | – | – | 1420 | 2,99 | 418 | 440 | – | 44,5 | 63,5 |
430 | 5,26 | 128 | 135 | – | – | – | 1455 | 2,95 | 428 | 450 | – | 45,3 | 64,3 |
450 | 5,16 | 133 | 140 | 75 | – | – | 1485 | 2,92 | 437 | 460 | – | 46,1 | 64,9 |
465 | 5,08 | 138 | 145 | – | – | – | 1520 | 2,89 | 447 | 470 | – | 46,9 | 65,7 |
480 | 4,99 | 143 | 150 | 78,7 | – | – | 1555 | 2,86 | -456 | 480 | – | 48,4 | 67,1 |
495 | 4,93 | 147 | 155 | – | – | – | 1630 | 2,81 | -475 | 500 | – | 49,1 | 67,7 |
510 | 4,85 | 152 | 160 | 81,7 | – | – | 1665 | 2,78 | -485 | 510 | – | 49,8 | 68,3 |
530 | 4,79 | 156 | 165 | – | – | – | 1700 | 2,75 | -494 | 520 | – | 50,5 | 69 |
545 | 4,71 | 162 | 170 | 85 | – | – | 1740 | 2,73 | -504 | 530 | – | 51,1 | 69,5 |
560 | 4,66 | 166 | 175 | – | – | – | 1775 | 2,7 | -513 | 540 | – | 51,7 | 70 |
575 | 4,59 | 171 | 180 | 87,1 | – | – | 1810 | 2,68 | -523 | 550 | – | 52,3 | 70,5 |
595 | 4,43 | 176 | 185 | – | – | – | 1845 | 2,66 | -532 | 560 | – | 53 | 71,2 |
610 | 4,47 | 181 | 190 | 89,5 | – | – | 1880 | 2,63 | -542 | 570 | – | 53,6 | 71,7 |
625 | 4,43 | 185 | 195 | – | – | – | 1920 | 2,6 | -551 | 580 | – | 54,1 | 72,1 |
640 | 4,37 | 190 | 200 | 91,5 | – | – | 1955 | 2,59 | -561 | 590 | – | 54,7 | 72,7 |
660 | 4,32 | 195 | 205 | 92,5 | – | – | 1955 | 2,59 | -570 | 600 | – | 55,2 | 73,2 |
675 | 4,27 | 199 | 210 | 93,5 | – | – | 2030 | 2,54 | -580 | 610 | – | 55,7 | 73,7 |
690 | 4,22 | 204 | 215 | 94 | – | – | 2070 | 2,52 | -589 | 620 | – | 56,3 | 74,2 |
705 | 4,18 | 209 | 220 | 95 | – | – | 2105 | 2,51 | -599 | 630 | – | 56,8 | 74,6 |
720 | 4,13 | 214 | 225 | 96 | – | – | 2145 | 2,49 | -608 | 640 | – | 57,3 | 75,1 |
740 | 4,08 | 219 | 230 | 96,7 | – | – | 2180 | 2,47 | -618 | 650 | – | 57,8 | 75,5 |
755 | 4,05 | 223 | 235 | – | – | – | 21,8 | – | – | 660 | – | 58,3 | 75,9 |
770 | 4,01 | 228 | 240 | 98,1 | 20,3 | 41,7 | – | – | – | 670 | – | 58,8 | 76,4 |
785 | 3,97 | 233 | 245 | – | 21,3 | 42,5 | – | – | – | 680 | – | 59,2 | 76,8 |
800 | 3,92 | 238 | 250 | 99,5 | 22,2 | 43,4 | – | – | – | 690 | – | 59,7 | 77,2 |
820 | 3,89 | 242 | 255 | – | 23,1 | 44,2 | – | – | – | 700 | – | 60,1 | 77,6 |
835 | 3,86 | 247 | 260 | -101 | 24 | 45 | – | – | – | 720 | – | 61 | 78,4 |
850 | 3,82 | 252 | 265 | – | 24,8 | 45,7 | – | – | – | 740 | – | 61,8 | 79,1 |
865 | 3,78 | 257 | 270 | -102 | 25,6 | 46,4 | – | – | – | 760 | – | 62,5 | 79,7 |
880 | 3,75 | 261 | 275 | – | 26,4 | 47,2 | – | – | – | 780 | – | 63,3 | 80,4 |
900 | 3,72 | 266 | 280 | -104 | 27,1 | 47,8 | – | – | – | 800 | – | 64 | 81,1 |
915 | 3,69 | 271 | 285 | – | 27,8 | 48,4 | – | – | – | 820 | – | 64,7 | 81,7 |
930 | 3,66 | 276 | 290 | -105 | 28,5 | 49 | – | – | – | 840 | – | 65,3 | 82,2 |
950 | 3,63 | 280 | 295 | – | 29,2 | 49,7 | – | – | – | 860 | – | 65,9 | 82,7 |
965 | 3,6 | 285 | 300 | – | 29,8 | 50,2 | – | – | – | 880 | – | 66,4 | 83,1 |
995 | 3,54 | 295 | 310 | – | 31 | 51,3 | – | – | – | 900 | – | 67 | 83,6 |
1030 | 4,49 | 304 | 320 | – | 32,2 | 52,3 | – | – | – | 920 | – | 67,5 | 84 |
1060 | 3,43 | 314 | 330 | – | 33,3 | 53,6 | – | – | – | 940 | – | 68 | 84,4 |