M8x1 ≤ D ≤ M16x1.5
|
維氏硬度 HV |
M16x1.5 < D ≤ M39x3
|
M8x1 ≤ D ≤ M16x1.5
|
布氏硬度 HB |
M16x1.5 < D ≤ M39x3
|
M8x1 ≤ D ≤ M16x1.5
|
洛氏硬度 HRC |
M16x1.5 < D ≤ M39x3
|
|
188 |
302 |
272 |
353 |
175 |
302 |
188 |
302 |
250① |
353② |
295③ |
353 |
295 |
353 |
188 |
302 |
272 |
353 |
190 |
302 |
233 |
302 |
295 |
353 |
260 |
353 |
/ |
/ |
179 |
287 |
259 |
336 |
166 |
287 |
179 |
287 |
238① |
336② |
280③ |
336 |
280 |
336 |
179 |
287 |
259 |
336 |
181 |
287 |
221 |
287 |
280 |
336 |
247 |
336 |
/ |
/ |
/ |
30 |
26 |
36 |
/ |
30 |
/ |
30 |
22.2① |
36② |
29③ |
36 |
29 |
36 |
/ |
30 |
26 |
36 |
/ |
30 |
/ |
30 |
29.2 |
36 |
24 |
36 |
/ |
/ |
|