ロック
ウェルC
スケール
硬さ |
ビ
ッ
カ
|
ス
硬
さ |
ブリネル硬さ
10mm球
荷重3000kgf |
ロックウェル硬さ |
シ
ョ
ア
硬
さ |
引張強さ
(近似値)
Mpa (2) |
---|
標
準
球 |
タングステン
カーバイト球 |
Aスケール
荷重
60kgf
ダイヤモンド
円錐圧子 |
Bスケール
荷重
100kgf
径1.6mm
(1/16in)球 |
Dスケール
荷重
100kgf
ダイヤモンド
円錐圧子 |
---|
HRC |
HV |
HB |
HRA |
HRB |
HRD |
Hs |
|
68 |
940 |
― |
― |
85.6 |
― |
76.9 |
97 |
― |
67 |
900 |
― |
― |
85.0 |
― |
76.1 |
95 |
― |
66 |
865 |
― |
― |
84.5 |
― |
75.4 |
92 |
― |
65 |
832 |
― |
(739) |
83.9 |
― |
74.5 |
91 |
― |
64 |
800 |
― |
(722) |
83.4 |
― |
73.8 |
88 |
― |
|
|
|
|
|
|
|
|
|
63 |
772 |
― |
(705) |
82.8 |
― |
73.0 |
87 |
― |
62 |
746 |
― |
(688) |
82.3 |
― |
72.2 |
85 |
― |
61 |
720 |
― |
(670) |
81.8 |
― |
71.5 |
83 |
― |
60 |
697 |
― |
(654) |
81.2 |
― |
70.7 |
81 |
― |
59 |
674 |
― |
(634) |
80.7 |
― |
69.9 |
80 |
― |
|
|
|
|
|
|
|
|
|
58 |
653 |
― |
615 |
80.1 |
― |
69.2 |
78 |
― |
57 |
633 |
― |
595 |
79.6 |
― |
68.5 |
76 |
― |
56 |
613 |
― |
577 |
79.0 |
― |
67.7 |
75 |
― |
55 |
595 |
― |
560 |
78.5 |
― |
66.9 |
74 |
2075 |
54 |
577 |
― |
543 |
78.0 |
― |
66.1 |
72 |
2015 |
|
|
|
|
|
|
|
|
|
53 |
560 |
― |
525 |
77.4 |
― |
65.4 |
71 |
1950 |
52 |
544 |
(500) |
512 |
76.8 |
― |
64.6 |
69 |
1880 |
51 |
528 |
(487) |
496 |
76.3 |
― |
63.8 |
68 |
1820 |
50 |
513 |
(475) |
481 |
75.9 |
― |
63.1 |
67 |
1760 |
49 |
489 |
(464) |
469 |
75.2 |
― |
62.1 |
66 |
1695 |
|
|
|
|
|
|
|
|
|
48 |
484 |
451 |
455 |
74.7 |
― |
61.4 |
64 |
1635 |
47 |
471 |
442 |
443 |
74.1 |
― |
60.8 |
63 |
1580 |
46 |
458 |
432 |
432 |
73.6 |
― |
60.0 |
62 |
1530 |
45 |
446 |
421 |
421 |
73.1 |
― |
59.2 |
60 |
1480 |
44 |
434 |
409 |
409 |
72.5 |
― |
58.5 |
58 |
1435 |
|
|
|
|
|
|
|
|
|
43 |
423 |
400 |
400 |
72.0 |
― |
57.7 |
57 |
1385 |
42 |
412 |
390 |
390 |
71.5 |
― |
56.9 |
56 |
1340 |
41 |
402 |
381 |
381 |
70.9 |
― |
56.2 |
55 |
1295 |
40 |
392 |
371 |
371 |
70.4 |
― |
55.4 |
54 |
1250 |
39 |
382 |
362 |
362 |
69.9 |
― |
54.6 |
52 |
1215 |
|
|
|
|
|
|
|
|
|
38 |
372 |
353 |
353 |
69.4 |
― |
53.8 |
51 |
1180 |
37 |
363 |
344 |
344 |
68.9 |
― |
53.1 |
50 |
1160 |
36 |
354 |
336 |
336 |
68.4 |
( 109.0 ) |
52.3 |
49 |
1115 |
35 |
345 |
327 |
327 |
67.9 |
( 108.5 ) |
51.5 |
48 |
1080 |
34 |
336 |
319 |
319 |
67.4 |
( 108.0 ) |
50.8 |
47 |
1055 |
|
|
|
|
|
|
|
|
|
33 |
327 |
311 |
311 |
66.8 |
( 107.5 ) |
50.0 |
46 |
1025 |
32 |
318 |
301 |
301 |
66.3 |
( 107.0 ) |
49.2 |
44 |
1000 |
31 |
310 |
294 |
294 |
65.8 |
( 106.0 ) |
48.4 |
43 |
980 |
30 |
302 |
286 |
286 |
65.3 |
( 105.5 ) |
47.7 |
42 |
950 |
29 |
294 |
279 |
279 |
64.7 |
( 104.5 ) |
47.0 |
41 |
930 |
|
|
|
|
|
|
|
|
|
28 |
286 |
271 |
271 |
64.3 |
( 104.0 ) |
46.1 |
41 |
910 |
27 |
279 |
264 |
264 |
63.8 |
( 103.0 ) |
45.2 |
40 |
880 |
26 |
272 |
258 |
258 |
63.3 |
( 102.5 ) |
44.6 |
38 |
860 |
25 |
266 |
253 |
253 |
62.8 |
( 101.5 ) |
43.8 |
38 |
840 |
24 |
260 |
247 |
247 |
62.4 |
( 101.0 ) |
43.1 |
37 |
825 |
|
|
|
|
|
|
|
|
|
23 |
254 |
243 |
243 |
62.0 |
100.0 |
42.1 |
36 |
805 |
22 |
248 |
237 |
237 |
61.5 |
99.0 |
41.6 |
35 |
785 |
21 |
243 |
231 |
231 |
61.0 |
98.5 |
40.9 |
35 |
770 |
20 |
238 |
226 |
226 |
60.5 |
97.8 |
40.1 |
34 |
760 |
(18) |
230 |
219 |
219 |
― |
96.7 |
― |
33 |
730 |
|
|
|
|
|
|
|
|
|
( 16 ) |
222 |
212 |
212 |
― |
95.5 |
― |
32 |
705 |
( 14 ) |
213 |
203 |
203 |
― |
93.9 |
― |
31 |
675 |
( 12 ) |
204 |
194 |
194 |
― |
92.3 |
― |
29 |
650 |
( 10 ) |
196 |
187 |
187 |
― |
90.7 |
― |
28 |
620 |
( 8 ) |
188 |
179 |
179 |
― |
89.5 |
― |
27 |
600 |
|
|
|
|
|
|
|
|
|
( 6 ) |
180 |
171 |
171 |
― |
87.1 |
― |
26 |
580 |
( 4 ) |
173 |
165 |
165 |
― |
85.5 |
― |
25 |
550 |
( 2 ) |
166 |
158 |
158 |
― |
83.5 |
― |
24 |
530 |
( 0 ) |
160 |
152 |
152 |
― |
81.7 |
― |
24 |
515 |
|