Источник: ОСТ 3-1279-86
Таблица 1
|
Числа твёрдости
|
Временное
сопротивление
sв
кгс/мм2
|
|||
|
по Бриннелю 10/1000
|
по Роквеллу
|
|||
|
шкалы
|
||||
|
Диаметр отпечатка, мм
|
Число твёрдости
|
В
стальной шарик
100 кгс
|
А
алмазный конус
60 кгс
|
|
|
HB
|
HRB
|
HRA
|
||
|
2,80
|
159
|
89,0
|
53,5
|
64
|
|
2,85
|
154
|
87,5
|
53,0
|
–
|
|
2,90
|
148
|
85,5
|
51,5
|
61
|
|
2,95
|
143
|
84,0
|
50,5
|
–
|
|
3,00
|
138
|
82,5
|
49,5
|
59
|
|
3,05
|
134
|
80,5
|
48,5
|
58
|
|
3,10
|
129
|
78,5
|
47,5
|
57
|
|
3,15
|
125
|
76,5
|
46,5
|
55
|
|
3,20
|
121
|
74,5
|
45,5
|
–
|
|
3,25
|
117
|
72,5
|
44,5
|
–
|
|
3,30
|
114
|
70,5
|
43,5
|
–
|
|
3,35
|
110
|
68,0
|
42,0
|
–
|
|
3,40
|
107
|
65,5
|
41,0
|
–
|
|
3,45
|
104
|
63,0
|
40,0
|
–
|
|
3,50
|
101
|
60,5
|
38,5
|
–
|
|
3,55
|
98
|
58,5
|
37,5
|
–
|
|
3,60
|
95
|
56,0
|
36,5
|
–
|
|
3,65
|
92
|
53,0
|
35,0
|
–
|
|
3,70
|
90
|
51,5
|
34,0
|
–
|
|
3,75
|
87
|
48,5
|
33,0
|
–
|
|
3,80
|
85
|
47,0
|
32,0
|
–
|
|
3,85
|
83
|
45,0
|
31,0
|
–
|
|
3,90
|
80
|
41,5
|
29,5
|
–
|
|
3,95
|
78
|
39,5
|
29,0
|
–
|
|
4,00
|
76
|
37,5
|
28,0
|
–
|
|
4,05
|
74
|
35,0
|
27,0
|
–
|
|
4,10
|
72
|
33,0
|
26,0
|
–
|
|
4,15
|
71
|
32,0
|
25,5
|
–
|
|
4,20
|
69
|
29,5
|
24,5
|
–
|
Таблица 2
|
Числа твёрдости
|
Временное сопротивление
sв
кгс/мм2
|
|||||
|
по Бриннелю 10/3000
|
по Роквеллу
|
по Виккерсу
|
||||
|
шкалы
|
||||||
|
Диаметр отпечатка, мм
|
Число твёрдости
|
С
алмазный конус
150 кгс
|
B
стальной шарик
100 кгс
|
A
алмазный
конус
60 кгс
|
|
|
|
HB
|
HRC
|
HRB
|
HRA
|
HV
|
||
|
–
|
–
|
65,0
|
–
|
83,5
|
830
|
–
|
|
–
|
–
|
64,0
|
–
|
83,0
|
800
|
–
|
|
–
|
–
|
63,0
|
–
|
82,5
|
780
|
–
|
|
–
|
–
|
62,0
|
–
|
82,0
|
760
|
–
|
|
–
|
–
|
61,0
|
–
|
81,5
|
740
|
–
|
|
–
|
–
|
60,0
|
–
|
81,0
|
720
|
–
|
|
–
|
–
|
59,0
|
–
|
80,5
|
700
|
–
|
|
–
|
–
|
58,0
|
–
|
80,0
|
680
|
–
|
|
–
|
–
|
57,0
|
–
|
79,5
|
660
|
–
|
|
–
|
–
|
56,0
|
–
|
79,0
|
645
|
–
|
|
–
|
–
|
55,0
|
–
|
78,5
|
625
|
–
|
|
–
|
–
|
54,0
|
–
|
78,0
|
605
|
–
|
|
–
|
–
|
53,0
|
–
|
77,5
|
590
|
–
|
|
–
|
–
|
52,0
|
–
|
77,0
|
575
|
196
|
|
–
|
–
|
51,0
|
–
|
76,5
|
555
|
190
|
|
–
|
–
|
50,0
|
–
|
76,0
|
540
|
184
|
|
–
|
–
|
49,0
|
–
|
75,5
|
525
|
178
|
|
2,80
|
477
|
48,0
|
–
|
75,0
|
510
|
172
|
|
2,85
|
461
|
46,5
|
–
|
74,0
|
490
|
164
|
|
2,90
|
444
|
45,0
|
–
|
73,5
|
475
|
156
|
|
2,95
|
429
|
43,5
|
–
|
72,5
|
450
|
149
|
|
3,00
|
415
|
42,0
|
–
|
72,0
|
432
|
142
|
|
3,05
|
401
|
40,5
|
–
|
71,0
|
415
|
136
|
|
3,10
|
388
|
39,5
|
–
|
70,5
|
402
|
131
|
|
3,15
|
375
|
38,0
|
–
|
70,0
|
388
|
125
|
|
3,20
|
363
|
37,0
|
–
|
69,0
|
375
|
122
|
|
3,25
|
352
|
35,5
|
–
|
68,5
|
365
|
117
|
|
3,30
|
341
|
34,5
|
–
|
68,0
|
354
|
114
|
|
3,35
|
331
|
33,5
|
–
|
67,5
|
345
|
111
|
|
3,40
|
321
|
32,0
|
–
|
67,0
|
334
|
107
|
|
3,45
|
311
|
31,0
|
–
|
66,5
|
324
|
105
|
|
3,50
|
302
|
29,5
|
–
|
65,5
|
314
|
102
|
|
3,55
|
298
|
28,5
|
–
|
65,0
|
304
|
99
|
|
3,60
|
285
|
27,0
|
–
|
64,5
|
295
|
96
|
|
3,65
|
277
|
26,0
|
–
|
63,5
|
286
|
94
|
|
3,70
|
269
|
24,0
|
–
|
63,0
|
277
|
89
|
|
3,75
|
262
|
23,0
|
–
|
62,5
|
270
|
87
|
|
3,80
|
255
|
22,0
|
–
|
62,0
|
262
|
85
|
|
3,85
|
248
|
20,5
|
–
|
61,5
|
255
|
82
|
|
3,90
|
241
|
–
|
100,0
|
60,5
|
247
|
81
|
|
3,95
|
235
|
–
|
99,5
|
60,0
|
242
|
79
|
|
4,00
|
229
|
–
|
99,0
|
59,5
|
237
|
78
|
|
4,05
|
223
|
–
|
98,0
|
59,0
|
230
|
77
|
|
4,10
|
217
|
–
|
97,5
|
58,5
|
226
|
76
|
|
4,15
|
212
|
–
|
96,5
|
58,0
|
220
|
74
|
|
4,20
|
207
|
–
|
95,5
|
57,0
|
215
|
72
|
|
4,25
|
201
|
–
|
94,5
|
56,5
|
209
|
70
|
|
4,30
|
197
|
–
|
93,5
|
56,0
|
205
|
69
|
|
4,35
|
192
|
–
|
92,5
|
55,0
|
200
|
67
|
|
4,40
|
187
|
–
|
91,0
|
54,5
|
195
|
66
|
|
4,45
|
183
|
–
|
90,0
|
54,0
|
190
|
65
|
|
4,50
|
179
|
–
|
89,0
|
53,5
|
186
|
64
|
|
4,55
|
174
|
–
|
87,5
|
53,0
|
180
|
–
|
|
4,60
|
170
|
–
|
86,5
|
52,0
|
177
|
62
|
|
4,65
|
167
|
–
|
85,5
|
51,5
|
174
|
61
|
|
4,70
|
163
|
–
|
84,0
|
50,5
|
170
|
–
|
|
4,75
|
159
|
–
|
83,0
|
50,0
|
166
|
60
|