硬さ換算表
　

各種硬さ説明

ビッカー ス
硬さ

HV		 ブリネル硬さ
10mm球
荷重300kgf		 ロックウｴル硬さ シ
ョ
ア
硬
さ
HS
標準球

HBS		 ﾀﾝｸﾞｽﾃﾝ
ｶｰﾊﾞｲﾄﾞ球
HBW		 Aｽｹｰﾙ
荷重60Kgf
ﾀﾞｲﾔﾓﾝﾄﾞ圧子
HRA		 Bｽｹｰﾙ
径1.6mm
(1-16in)球
HRB		 Cｽｹｰﾙ
荷重150Kgf
ﾀﾞｲﾔﾓﾝﾄﾞ圧子
HRC		 Dｽｹｰﾙ
荷重100Kgf
ﾀﾞｲﾔﾓﾝﾄﾞ圧子
HRD
940 - - 85.6 - 68.0 76.9 97
920 - - 85.3 - 67.5 75.6 96
900 - - 85.0 - 67.0 76.1 95
880 - (767) 84.7 - 66.4 75.7 93
860 - (757) 84.4 - 65.9 75.3 92
840 - (745) 84.1
 -
 65.3
 74.8
 91
820
(733) 83.8
 -
 64.4
 74.3
 90
800 - (722) 83.4
 -
 64.0
 73.8
 88
780 - (710) 83.0
 -
 63.3
 73.3
 87
760 - (698) 82.6
 -
 62.5
 72.6
 86
740 - (684) 82.2
 -
 61.8
 72.1
 84
720 - 670) 81.8
 -
 61.0
 71.5
 83
700 - (656) 81.3
 -
 60.1
 7.08
 81
690 - (648) 81.1
 -
 59.7
 70.5
 -
680 - (638) 80.8
 -
 59.2
 70.1
 80
670 - 630 80.6
 -
 58.8
 69.8
 -
660 - 620 80.3
 -
 58.3
 69.4
 79
650 - 611 80.0
 -
 57.8
 69.0
 -
640 - 601
 79.8
 -
 57.3
 68.7
 77
630 - 591
 79.5
 -
 56.8
 68.3
 -
620 - 582
 79.2
 -
 56.3
 67.9
 75
610 - 573
 78.9
 -
 55.7
 67.5
 -
600 - 564
 78.6
 -
 55.2
 67.0
 74
590 - 554
 78.4
 -
 54.7
 66.7
 -
580 - 545
 78.0
 -
 54.1
 66.2
 72
570 -
 535
 77.8
 -
 53.6
 65.8
 -
560
 -
 525
 77.4
 -
 53.0
 65.4
 71
550
 (505)
 517
 77.0
 -
 52.3
 64.8
 -
540
 (496)
 507
 76.7
 -
 51.7
 64.4
 69
530
 (488)
 497
 76.4
 -
 51.1
 63.9
 -
520
 (480)
 488
 76.1
 -
 50.5
 63.5
 67
510
 (473)
 479
 75.7
 -
 49.8
 62.9
 -
500
 (465)
 471
 75.3
 -
 49.1
 62.2
 66
490
 (456)
 460
 74.9
 -
 48.4
 61.6
 -
480
 448
 452
 74.5
 -
 47.7
 61.3
 64
470
 441
 442
 74.1
 -
 46.9
 60.7
 -
460
 433
 433
 73.6
 -
 46.1
 60.1
 62
450
 425
 425
 73.3
 -
 45.3 59.4
 -
440
 415
 415
 72.8
 -
 44.5
 58.8
 59
430
 405
 405
 72.3
 -
 43.6
 58.2
 -
420
 397
 397
 71.8
 -
 42.7
 57.5
 57

ビッカー ス
硬さ

HV

 ブリネル硬さ
10mm球
荷重300kgf		 ロックウｴル硬さ シ
ョ
ア
硬
さ
HS
標準球

HBS		 ﾀﾝｸﾞｽﾃﾝ
ｶｰﾊﾞｲﾄﾞ球
HBW		 Aｽｹｰﾙ
荷重60Kgf
ﾀﾞｲﾔﾓﾝﾄﾞ圧子
HRA		 Bｽｹｰﾙ
径1.6mm
(1-16in)球
HRB		 Cｽｹｰﾙ
荷重150Kgf
ﾀﾞｲﾔﾓﾝﾄﾞ圧子
HRC		 Dｽｹｰﾙ
荷重100Kgf
ﾀﾞｲﾔﾓﾝﾄﾞ圧子
HRD
410
 388
 388
 71.4
 -
 41.8
 56.8
 -
400
 379
 379
 70.8
 -
 40.8
 56.0
 55
390
 369
 369
 70.3
 -
 39.8
 55.2
 -
380
 360
 360
 69.8
 (110.0)
 38.8
 54.4
 52
370
 350
 350
 69.2
 -
 37.7
 53.6
 -
360
 341
 341
 68.7
 (109.0)
 36.6
 52.8
 50
350
 331
 331
 68.1
 -
 35.5
 51.9
 -
340
 322
 322
 67.6
 (108.0)
 34.4
 51.1
 47
330
 313
 313
 67.0
 -
 33.3
 50.2
 -
320
 303
 303
 66.4
 (107.0)
 32.2
 49.4
 45
310
 294
 294
 65.8
 -
 31.0
 48.4
 -
300
 284
 284
 65.2
 (105.5)
 29.8
 47.5
 42
295
 280
 280
 64.8
 -
 29.2
 47.1
 -
290
 275
 275
 64.5
 (104.5)
 28.5
 46.5
 41
285
 270
 270
 64.2
 -
 27.8
 46.0
 -
280
 265
 265
 63.8
 (103.5)
 27.1
 45.3
 40
275
 261
 261
 63.5
 -
 26.4
 44.9
 -
270
 256
 256
 63.1
 (012.0)
 25.6
 44.3
 38
265
 252
 252
 62.7
 -
 24.8
 43.7
 -
260
 247
 247
 62.4
 (101.0)
 24.0
 43.1
 37
255
 243
 243
 62.0
 -
 23.1
 42.2
 -
250
 238
 238
 61.6
 99.5
 22.2
 41.7
 36
245
 233
 233
 61.2
 - 21.3
 41.1
 -
240
 228
 228
 60.7
 98.1 20.3
 40.3
 34
230
 219
 219
 -
 96.7
 (18.0)
 -
 -
220
 209
 209
 -
 95.0
 (15.7)
 -
 33
210
 200
 200
 -
 93.4
 (13.4)
 -
 32
200
 190
 190
 -
 91.5
 (11.1)
 -
 30
190
 181
 181
 -
 89.5
 (8.5)
 -
 29
180
 171
 171
 -
 87.1
 (6.0)
 -
 28
170
 162
 162
 -
 85.0
 (3.0)
 -
 26
160
 152
 152
 -
 81.7
 (0.0)
 -
 25
150
 143
 143
 -
 78.7
 -
 -
 24
140
 133
 133
 -
 75.0
 -
 -
 22
130
 124
 124
 -
 71.2
 -
 -
 21
120
 114
 114
 -
 66.7
 -
 -
 20
110
 105
 105
 -
 62.3
 -
 -
 -
100
 95
 95
 -
 56.2
 -
 -
 -
95
 90
 90
 -
 52.0
 -
 -
 -
90
 86
 86
 -
 48.0
 -
 -
 -
85
 81
 81
 -
 41.0
 -
 -
 -