Page 22 - Yamawa_European_Catalogue_YEU23

Hardness conversion table
Durezze Härte Dureté Dureza Твердость
Intro

BRINELL HARDNESS ROCKWELL HARDNESS*2 ROCKWELL SUPERFICIAL HARDNESS
ROCKWELL VICKERS SHORE TENSILE ROCKWELL
C SCALE HARDNESS HARDNESS STRENGTH C SCALE
TUNGSTEN
SP HARDNESS STANDARD CARBIDE BALL A SCALE B SCALE D SCALE 15-N SCALE 30-N SCALE 45-N SCALE MPA*1 HARDNESS*2
BALL
HRC HV HB HRA HRB HRD HS15N HS30N HS45N HS - HRC
68 940 - - 85.6 - 76.9 93.2 84.4 75.4 97 - 68
67 900 - - 85.0 - 76.1 92.9 83.6 74.2 95 - 67
SL 66 865 - - 84.5 - 75.4 92.5 82.8 73.3 92 - 66
65 832 - (739) 83.9 - 74.5 92.2 81.9 72.0 91 - 65
64 800 - (722) 83.4 - 73.8 91.8 81.1 71.0 88 - 64
63 772 - (705) 82.8 - 73.0 91.4 80.1 69.9 87 - 63
62 746 - (688) 82.3 - 72.2 91.1 79.3 68.8 85 - 62
PO 61 720 - (670) 81.8 - 71.5 90.7 78.4 67.7 83 - 61
60 697 - (654) 81.2 - 70.7 90.2 77.5 66.7 81 - 60
59 674 - (634) 80.7 - 69.9 89.8 76.6 65.5 80 - 59
58 653 - 615 80.1 - 69.2 89.3 75.7 64.3 78 - 58
57 633 - 595 79.6 - 68.5 88.9 74.8 63.2 76 - 57
ST
56 613 - 577 79.0 - 67.7 88.3 73.9 62.0 75 - 56
55 595 - 560 78.5 - 66.9 87.9 73.0 60.9 74 2075 55
54 577 - 543 78.0 - 66.1 87.4 72.0 59.8 72 2015 54
53 560 - 525 77.4 - 65.4 86.9 71.2 58.6 71 1950 53
ROLL 52 544 (500) 512 76.8 - 64.6 86.4 70.2 57.4 69 1880 52
51 528 (487) 496 76.3 - 63.8 85.9 69.4 56.1 68 1820 51
50 513 (475) 481 75.9 - 63.1 85.5 68.5 55.0 67 1760 50
49 498 (464) 469 75.2 - 62.1 85.0 67.6 53.8 66 1695 49
48 484 451 455 74.7 - 61.4 84.5 66.7 52.5 64 1635 48
CARBIDE 47 471 442 443 74.1 - 60.8 83.9 65.8 51.4 63 1580 47
46 458 432 432 73.6 - 60.0 83.5 64.8 50.3 62 1530 46
45 446 421 421 73.1 - 59.2 83.0 64.0 49.0 60 1480 45
44 434 409 409 72.5 - 58.5 82.5 63.1 47.8 58 1435 44
43 423 400 400 72.0 - 57.7 82.0 62.2 46.7 57 1385 43
LONG 42 412 390 390 71.5 - 56.9 81.5 61.3 45.5 56 1340 42
41 402 381 381 70.9 - 56.2 80.9 60.4 44.3 55 1295 41
40 392 371 371 70.4 - 55.4 80.4 59.5 43.1 54 1250 40
39 382 362 362 69.9 - 54.6 79.9 58.6 41.9 52 1215 39
HAND 38 372 353 353 69.4 - 53.8 79.4 57.7 40.8 51 1180 38
TAPS 37 363 344 344 68.9 - 53.1 78.8 56.8 39.6 50 1160 37
36 354 336 336 68.4 (109.0) 52.3 78.3 55.9 38.4 49 1115 36
35 345 327 327 67.9 (108.5) 51.5 77.7 55.0 37.2 48 1080 35
34 336 319 319 67.4 (108.0) 50.8 77.2 54.2 36.1 47 1055 34
33 327 311 311 66.8 (107.5) 50.0 76.6 53.3 34.9 46 1025 33
EG (STI)
32 318 301 301 66.3 (107.0) 49.2 76.1 52.1 33.7 44 1000 32
31 310 294 294 65.8 (106.0) 48.4 75.6 51.3 32.5 43 980 31
30 302 286 286 65.3 (105.5) 47.7 75.0 50.4 31.3 42 950 30
SPECIAL 29 294 279 279 64.7 (104.5) 47.0 74.5 49.5 30.1 41 930 29
THREADS, 28 286 271 271 64.3 (104.0) 46.1 73.9 48.6 28.9 41 910 28
GAUGES 27 279 264 264 63.8 (103.0) 45.2 73.3 47.7 27.8 40 880 27
26 272 258 258 63.3 (102.5) 44.6 72.8 46.8 26.7 38 860 26
25 266 253 253 62.8 (101.5) 43.8 72.2 45.9 25.5 38 840 25
24 260 247 247 62.4 (101.0) 43.1 71.6 45.0 24.3 37 825 24
THREAD
23 254 243 243 62.0 100.0 42.1 71.0 44.0 23.1 36 805 23
MILLS
22 248 237 237 61.5 99.0 41.6 70.5 43.2 22.0 35 785 22
21 243 231 231 61.0 98.5 40.9 69.9 42.3 20.7 35 770 21
20 238 226 226 60.5 97.8 40.1 69.4 41.5 19.6 34 760 20
18 230 219 219 - 96.7 - - - - 33 730 (18)
DIES (16) 222 212 212 - 95.5 - - - - 32 705 (16)
(14) 213 203 203 - 93.9 - - - - 31 675 (14)
(12) 204 194 194 - 92.3 - - - - 29 650 (12)
(10) 196 187 187 - 90.7 - - - - 28 620 (10)
CENTER (8) 188 179 179 - 89.5 - - - - 27 600 8
DRILLS (6) 180 171 171 - 87.1 - - - - 26 580 (6)
(4) 173 165 165 - 85.5 - - - - 25 550 (4)
(2) 166 158 158 - 83.5 - - - - 24 530 (2)
(0) 160 152 152 - 81.7 - - - - 24 515 (0)
Technical *1 : 1MPa=1N/mm2
info *2 : In the table above, numbers in brackets are only provide for reference.
This table is abstracted from SAE J 417.

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