Hardness Conversion

Hardness Conversion

 

Technical Resources — Hardness Conversion

Brinell Hardness
 
Rockwell Hardness
 
Tensile Strength
 
Tungsten Carbide
Ball 3000 KG
 
A Scale 60KG
 
B Scale 100KG
 
C Scale 150KG
 
(Approx.)
 
 
85.6
 
 
68.0
 
 
 
85.3
 
 
67.5
 
 
 
85.0
 
 
67.0
 
 
767
 
84.7
 
 
66.4
 
 
757
 
84.4
 
 
65.9
 
 
745
 
84.1
 
 
65.3
 
 
733
 
83.8
 
 
64.7
 
 
722
 
83.4
 
 
64.0
 
 
712
 
 
 
 
 
710
 
83.0
 
 
63.3
 
 
698
 
82.6
 
 
62.5
 
 
684
 
82.2
 
 
61.8
 
 
682
 
82.2
 
 
61.7
 
 
670
 
81.8
 
 
61.0
 
 
656
 
81.3
 
 
60.1
 
 
653
 
81.2
 
 
60.0
 
 
647
 
81.1
 
 
59.7
 
 
638
 
80.8
 
 
59.2
 
329,000
 
630
 
80.6
 
 
58.8
 
324,000
 
627
 
80.5
 
 
58.7
 
323,000
 
601
 
79.8
 
 
57.3
 
309,000
 
578
 
79.1
 
 
56.0
 
297,000
 
555
 
78.4
 
 
54.7
 
285,000
 
534
 
77.8
 
 
53.5
 
274,000
 
514
 
76.9
 
 
52.1
 
263,000
 
495
 
76.3
 
 
51.0
 
253,000
 
477
 
75.6
 
 
49.6
 
243,000
 
461
 
74.9
 
 
48.5
 
235,000
 
444
 
74.2
 
 
47.1
 
225,000
 
429
 
73.4
 
 
45.7
 
217,000
 
415
 
72.8
 
 
44.5
 
210,000
 
401
 
72.0
 
 
43.1
 
202,000
 
388
 
71.4
 
 
41.8
 
195,000
 
375
 
70.6
 
 
40.4
 
188,000
 
363
 
70.0
 
 
39.1
 
182,000
 
352
 
69.3
 
 
37.9
 
176,000
 
341
 
68.7
 
 
36.6
 
170,000
 
Brinell Hardness
 
Rockwell Hardness
 
Tensile Strength
 
Tungsten Carbide Ball 3000 KG
 
A Scale 60KG
 
B Scale 100KG
 
C Scale 150KG
 
(Approx.)
 
331
 
68.1
 
 
35.5
 
166,000
 
321
 
67.5
 
 
34.3
 
160,000
 
311
 
66.9
 
 
33.1
 
155,000
 
302
 
66.3
 
 
32.1
 
150,000
 
293
 
65.7
 
 
30.9
 
145,000
 
285
 
65.3
 
 
29.9
 
141,000
 
277
 
64.6
 
 
28.8
 
137,000
 
269
 
64.1
 
 
27.6
 
133,000
 
262
 
63.6
 
 
26.6
 
129,000
 
255
 
63.0
 
 
25.4
 
126,000
 
248
 
62.5
 
 
24.2
 
122,000
 
241
 
61.8
 
100.0
 
22.8
 
118,000
 
235
 
61.4
 
99.0
 
21.7
 
115,000
 
229
 
60.8
 
98.2
 
20.5
 
111,000
 
223
 
 
97.3
 
20.0
 
 
217
 
 
96.4
 
18.0
 
105,000
 
212
 
 
95.5
 
17.0
 
102,000
 
207
 
 
94.6
 
16.0
 
100,000
 
201
 
 
93.8
 
15.0
 
98,000
 
197
 
 
92.8
 
 
95,000
 
192
 
 
91.9
 
 
93,000
 
187
 
 
90.7
 
 
90,000
 
183
 
 
90.0
 
 
89,000
 
179
 
 
89.0
 
 
87,000
 
174
 
 
87.8
 
 
85,000
 
170
 
 
86.8
 
 
83,000
 
167
 
 
86.0
 
 
81,000
 
163
 
 
85.0
 
 
79,000
 
156
 
 
82.9
 
 
76,000
 
149
 
 
80.8
 
 
73,000
 
143
 
 
78.7
 
 
71,000
 
137
 
 
76.4
 
 
67,000
 
131
 
 
74.0
 
 
65,000
 
126
 
 
72.0
 
 
63,000
 
121
 
 
69.8
 
 
60,000
 
116
 
 
67.6
 
 
58,000
 
111
 
 
65.7
 
 
56,000
 

 

 

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