Page 972 - MiSUMi FA Mechanical Components Economy Series

P. 972

[Technical Data]
Hardness Conversion Table (SAEJ417) *Revised in 1983

Approximate Conversion of Rockwell C Hardness Values for Steel (1)
Brinell Hardness (HB) Rockwell Superﬁ cial Hardness
Tensile Strength Rockwell
(HRC) 10mm Ball , Rockwell Hardness (3) Diamond Cone Indenter (Hs) (Approximated Value) C-Scale
Rockwell (HV) Load 3000kgf
C-Scale Vickers Tungsten (HRA) A (HRB) B Scale, (HRD) D Scale, 15N 30N 45N Shore MPa Hardness
Hardness Hardness Standard Carbide Scale, Load Load100kgf, Load 100kgf, Scale Load Scale Load Scale Load Hardness (kgf/mm 2 ) C
Sphere Sphere 60kgf,Diamond Diameter1.6mm Diamond Cone 15kgf 30kgf 45kgf (2) (3)
Indenter
Cone Indenter (1/16in)Sphere
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
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
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 66.6 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
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 (212) 55
54 577  543 78.0  66.1 87.4 72.0 59.8 72 2015 (205) 54
53 560  525 77.4  65.4 86.9 71.2 58.5 71 1950 (199) 53
52 544 (500) 512 76.8  64.6 86.4 70.2 57.4 69 1880 (192) 52
51 528 (487) 496 76.3  63.8 85.9 69.4 56.1 68 1820 (186) 51
50 513 (475) 481 75.9  63.1 85.5 68.5 55.0 67 1760 (179) 50
49 498 (464) 469 75.2  62.1 85.0 67.6 53.8 66 1695 (173) 49
48 484 451 455 74.7  61.4 84.5 66.7 52.5 64 1635 (167) 48
47 471 442 443 74.1  60.8 83.9 65.8 51.4 63 1580 (161) 47
46 458 432 432 73.6  60.0 83.5 64.8 50.3 62 1530 (156) 46
45 446 421 421 73.1  59.2 83.0 64.0 49.0 60 1480 (151) 45
44 434 409 409 72.5  58.5 82.5 63.1 47.8 58 1435 (146) 44
43 423 400 400 72.0  57.7 82.0 62.2 46.7 57 1385 (141) 43
42 412 390 390 71.5  56.9 81.5 61.3 45.5 56 1340 (136) 42
41 402 381 381 70.9  56.2 80.9 60.4 44.3 55 1295 (132) 41
40 392 371 371 70.4  55.4 80.4 59.5 43.1 54 1250 (127) 40
39 382 362 362 69.9  54.6 79.9 58.6 41.9 52 1215 (124) 39
38 372 353 353 69.4  53.8 79.4 57.7 40.8 51 1180 (120) 38
37 363 344 344 68.9  53.1 78.8 56.8 39.6 50 1160 (118) 37
36 354 336 336 68.4 (109.0) 52.3 78.3 55.9 38.4 49 1115 (114) 36
35 345 327 327 67.9 (108.5) 51.5 77.7 55.0 37.2 48 1080 (110) 35
34 336 319 319 67.4 (108.0) 50.8 77.2 54.2 36.1 47 1055 (108) 34
33 327 311 311 66.8 (107.5) 50.0 76.6 53.3 34.9 46 1025 (105) 33
32 318 301 301 66.3 (107.0) 49.2 76.1 52.1 33.7 44 1000 (102) 32
31 310 294 294 65.8 (106.0) 48.4 75.6 51.3 32.7 43 980 (100) 31
30 302 286 286 65.3 (105.5) 47.7 75.0 50.4 31.3 42 950 ( 97) 30
29 294 279 279 64.7 (104.5) 47.0 74.5 49.5 30.1 41 930 ( 95) 29
28 286 271 271 64.3 (104.0) 46.1 73.9 48.6 28.9 41 910 ( 93) 28
27 279 264 264 63.8 (103.0) 45.2 73.3 47.7 27.8 40 880 ( 90) 27
26 272 258 258 63.3 (102.5) 44.6 72.8 46.8 26.7 38 860 ( 88) 26
25 266 253 253 62.8 (101.5) 43.8 72.2 45.9 25.5 38 840 ( 86) 25
24 260 247 247 62.4 (101.0) 43.1 71.6 45.0 24.3 37 825 ( 84) 24
23 254 243 243 62.0 100.0 42.1 71.0 44.0 23.1 36 805 ( 82) 23
22 248 237 237 61.5 99.0 41.6 70.5 43.2 22.0 35 785 ( 80) 22
21 243 231 231 61.0 98.5 40.9 69.9 42.3 20.7 35 770 ( 79) 21
20 238 226 226 60.5 97.8 40.1 69.4 41.5 19.6 34 760 ( 77) 20
(18) 230 219 219  96.7     33 730 ( 75) (18)
(16) 222 212 212  95.5     32 705 ( 72) (16)
(14) 213 203 203  93.9     31 675 ( 69) (14)
(12) 204 194 194  92.3     29 650 ( 66) (12)
(10) 196 187 187  90.7     28 620 ( 63) (10)
( 8) 188 179 179  89.5     27 600 ( 61) ( 8)
( 6) 180 171 171  87.1     26 580 ( 59) ( 6)
( 4) 173 165 165  85.5     25 550 ( 56) ( 4)
( 2) 166 158 158  83.5     24 530 ( 54) ( 2)
( 0) 160 152 152  81.7     24 515 ( 53) ( 0)
Note (1): Blue figures: Based on ASTM E 140, Table 1 (Jointly coordinated by SAE, ASM and ASTM).
(2): The units and figures shown in brackets are the results of conversion from psi figures by reference to JIS
Z 8413 and Z 8438 conversion tables.
Moreover, 1MPa=1N/mm 2
(3): The figures in brackets are in ranges not frequently used. They are given as referential data.
969

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