|
BRINELL
HARDNESS
|
ROCKWELL
B SCALE
|
ROCKWELL
C SCALE
|
APPROX.
TENSILE LBS. P.S.I.
|
|
653
|
...
|
62
|
324,000
|
|
627
|
...
|
60
|
311,000
|
|
601
|
...
|
59
|
306,000
|
|
578
|
...
|
57
|
290,000
|
|
555
|
...
|
56
|
284,000
|
|
534
|
...
|
54
|
270,000
|
|
514
|
...
|
53
|
263,000
|
|
495
|
...
|
51
|
250,000
|
|
477
|
...
|
50
|
243,000
|
|
461
|
...
|
49
|
236,000
|
|
444
|
...
|
47
|
223,000
|
|
429
|
...
|
46
|
217,000
|
|
415
|
...
|
45
|
211,000
|
|
401
|
...
|
42
|
194,000
|
|
388
|
...
|
41
|
188,000
|
|
375
|
...
|
40
|
182,000
|
|
363
|
...
|
38
|
171,000
|
|
352
|
...
|
37
|
166,000
|
|
331
|
...
|
36
|
162,000
|
|
321
|
|
34
|
153,000
|
|
311
|
...
|
33
|
148,000
|
|
302
|
...
|
32
|
144,000
|
|
293
|
...
|
31
|
140,000
|
|
285
|
...
|
30
|
136,000
|
|
277
|
...
|
29
|
132,000
|
|
269
|
...
|
28
|
129,000
|
|
262
|
...
|
27
|
126,000
|
|
255
|
...
|
25
|
120.000
|
|
248
|
...
|
24
|
117,000
|
|
241
|
100
|
23
|
115,000
|
|
235
|
99
|
22
|
112,000
|
|
229
|
98
|
21
|
110,000
|
|
223
|
97
|
20
|
108,000
|
|
217
|
96
|
...
|
103,000
|
|
212
|
96
|
...
|
103,000
|
|
207
|
95
|
...
|
101,000
|
|
202
|
94
|
...
|
98,000
|
|
197
|
93
|
...
|
96,000
|
|
192
|
92
|
...
|
93,000
|
|
187
|
91
|
...
|
91,000
|
|
183
|
90
|
...
|
89,00
|
|
179
|
89
|
...
|
87,000
|
|
174
|
88
|
...
|
85,000
|
|
170
|
87
|
...
|
83,000
|
|
166
|
86
|
...
|
81,000
|
|
163
|
85
|
...
|
80,000
|
|
159
|
84
|
...
|
78,000
|
|
156
|
83
|
...
|
77,000
|
|
153
|
82
|
...
|
76,000
|
|
149
|
81
|
...
|
75,000
|
|
146
|
80
|
...
|
74,000
|
|
143
|
79
|
...
|
73,000
|
|
140
|
78
|
...
|
71,000
|
|
137
|
77
|
...
|
70,000
|
|
134
|
76
|
...
|
69,000
|
|
131
|
74
|
...
|
67,000
|
|
128
|
73
|
...
|
66,000
|
|
126
|
72
|
...
|
65,000
|
|
124
|
71
|
...
|
63,000
|
|
121
|
70
|
...
|
62,000
|
|
118
|
69
|
...
|
61,000
|
|
116
|
68
|
...
|
60,000
|
|
114
|
67
|
...
|
59,000
|
|
112
|
66
|
...
|
58,000
|
|
109
|
65
|
...
|
57,000
|
|
107
|
64
|
...
|
55,000
|
|
105
|
62
|
...
|
54,000
|
|
...
|
|