COMBALLS GROUP.
Qingdao ,266061, China
http://www.comballs.com
Phone: +86 532 88235086;Fax:+86 532 83883615
sales@comballs.com

Hardness Conversion
Tensile
Strength
(N/mm2)		 Hardness
Vickers		 Hardness
Brinell*		 HRB HRF HRC HRA
770 240 228 98.1 114.3 20.3 60.7
785 245 233     21.3 61.2
800 250 238 99.5 115.1 22.2 61.6
820 265 242     23.1 62.0
835 260 247 (101)   24.0 62.4
850 265 252     25.8 62.7
865 270 257 (102)   25.8 63.1
880 275 261     26.4 63.5
900 208 266 (104)   27.1 63.8
915 285 271     27.8 64.2
930 290 276 (105)   28.5 64.5
950 295 280     29.2 64.8
965 300 285     29.8 65.2
995 310 295     31.0 65.8
1030 320 304     32.2 66.4
1060 330 314     33.3 67.0
1095 340 323     34.4 67.6
1125 350 333     35.5 68.1
1155 360 342     36.6 68.7
1190 370 352     37.7 69.2
1220 380 361     38.8 69.8
1225 390 371     39.8 70.3
1290 400 380     40.8 70.8
1320 410 390     41.8 71.4
1350 420 399     42.7 71.8
1385 430 409     43.6 72.3
1420 440 418     44.5 72.8
1455 450 428     45.3 73.3
1485 460 437     46.1 73.6
1520 470 447     46.9 74.1
1555 480 (456)     47.7 74.5
1595 490 (466)     48.4 74.8
1630 500 (475)     49.1 75.3
1665 510 (485)     49.8 75.7
1700 520 (494)     50.5 76.1
1740 530 (504)     51.1 76.4
1775 540 (513)     51.7 76.7
1810 550 (523)     52.3 77.0
1845 560 (532)     53.0 77.4
1880 570 (542)     53.6 77.8
1920 580 (551)     54.1 78.0
1955 590 (561)     54.7 78.4
1995 600 (570)     55.2 78.6
2030 610 (580)     55.7 78.9
2070 620 (589)     56.3 79.2
2105 630 (599)     56.5 79.5
2145 640 (608)     57.3 79.8
2180 650 (618)     57.8 80.0
  660       58.3 80.3
  670       58.8 80.6
  680       59.2 80.8
  690       59.7 81.1
  700       60.1 81.3
  720       61.0 81.8
  740       61.8 82.2
  760       62.5 82.6
  780       63.3 83.0
  800       64.0 83.4
  820       64.7 83.8
  840       65.3 84.1
  860       65.9 84.4
  880       66.4 84.7
  900       67.0 85.0
  920       67.5 85.3
  940       68.8 85.6