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Blacksmithing and metalworking questions answered.
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Blacksmithing and Metalworking Tools Historical Preservation.
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Hardness Conversion Table |
Brinell Hardness |
Rockwell Hardness |
Steel |
Tungsten Carbide
Ball 3000 kg
|
A Scale 60 kg
|
B Scale 100 kg
|
C Scale 150 kg
|
Tensile Stength (approx.) PSI
|
- |
86 |
- |
68
|
- |
- |
85 |
- |
68 |
-
|
-
|
85
|
-
|
67
|
-
|
767
|
85
|
-
|
66
|
-
|
757
|
84
|
-
|
66
|
-
|
745
|
84
|
-
|
65
|
-
|
733
|
84
|
-
|
65
|
-
|
722
|
83
|
-
|
64
|
-
|
712
|
-
|
-
|
-
|
-
|
710
|
83
|
-
|
63
|
-
|
698
|
83
|
-
|
62
|
-
|
684
|
82
|
-
|
62
|
-
|
682
|
82
|
-
|
62
|
-
|
670
|
82
|
-
|
61
|
-
|
656
|
81
|
-
|
60
|
-
|
653
|
81
|
-
|
60
|
-
|
647
|
81
|
-
|
60
|
-
|
638
|
81
|
-
|
59
|
329,000
|
630
|
81
|
-
|
59
|
324,000
|
627
|
80
|
-
|
59
|
323,000
|
601
|
80
|
-
|
57
|
309,000
|
578
|
79
|
-
|
56
|
297,000
|
555
|
78
|
-
|
55
|
285,000
|
534
|
78
|
-
|
54
|
274,000
|
514
|
77
|
-
|
52
|
263,000
|
495
|
76
|
-
|
51
|
253,000
|
477
|
76
|
-
|
50
|
243,000
|
461
|
75
|
-
|
48
|
235,000
|
444
|
74
|
-
|
47
|
225,000
|
429
|
73
|
-
|
46
|
217,000
|
415
|
73
|
-
|
44
|
210,000
|
401
|
72
|
-
|
43
|
202,000
|
388
|
71
|
-
|
42
|
195,000
|
375
|
71
|
-
|
40
|
188,000
|
363
|
70
|
-
|
39
|
182,000
|
352
|
69
|
-
|
38
|
176,000
|
341
|
69
|
-
|
37
|
170,000
|
331
|
68
|
-
|
36
|
166,000
|
321
|
68
|
-
|
34
|
160,000
|
311
|
67
|
-
|
33
|
155,000
|
302
|
66
|
-
|
32
|
150,000
|
293
|
66
|
-
|
31
|
145,000
|
285
|
65
|
-
|
30
|
141,000
|
277
|
65
|
-
|
29
|
137,000
|
269
|
64
|
-
|
28
|
133,000
|
262
|
64
|
-
|
27
|
129,000
|
255
|
63
|
-
|
25
|
126,000
|
248
|
62
|
-
|
24
|
122,000
|
241
|
62
|
100
|
23
|
118,000
|
235
|
61
|
99
|
22
|
115,000
|
229
|
61
|
98
|
20
|
111,000
|
223
|
-
|
97
|
20
|
-
|
217
|
-
|
96
|
18
|
105,000
|
212
|
-
|
96
|
17
|
102,000
|
207
|
-
|
95
|
16
|
100,000
|
201
|
-
|
94
|
15
|
98,000
|
197
|
-
|
93
|
-
|
95,000
|
192
|
-
|
92
|
-
|
93,000
|
187
|
-
|
91
|
-
|
90,000
|
183
|
-
|
90
|
-
|
89,000
|
179
|
-
|
89
|
-
|
87,000
|
174
|
-
|
88
|
-
|
85,000
|
170
|
-
|
87
|
-
|
83,000
|
167
|
-
|
86
|
-
|
81,000
|
163
|
-
|
85
|
-
|
79,000
|
156
|
-
|
83
|
-
|
76,000
|
149
|
-
|
81
|
-
|
73,000
|
143
|
-
|
79
|
-
|
71,000
|
137
|
-
|
76
|
-
|
67,000
|
131
|
-
|
74
|
-
|
65,000
|
126
|
-
|
72
|
-
|
63,000
|
121
|
-
|
70
|
-
|
60,000
|
116
|
-
|
68
|
-
|
58,000
|
111 |
- |
66 |
- |
56,000 |
|
2002 Jock Dempsey, www.anvilfire.com
|
|
|
Ball 3000 kg
60 kg
100 kg
150 kg
(approx.) PSI