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Hardness Conversions Chart
Brinnel Hardness HB |
Vickers Hardness HV |
Rockwell Hardness HRC |
Rockwell Hardness HRB |
Tensile Strength ksi |
321 |
339 |
34 |
108 |
158 |
311 |
328 |
33 |
108 |
154 |
302 |
319 |
32 |
107 |
150 |
293 |
309 |
31 |
106 |
146 |
285 |
301 |
30 |
105 |
142 |
277 |
292 |
29 |
104 |
138 |
269 |
284 |
28 |
104 |
135 |
262 |
276 |
27 |
103 |
131 |
255 |
269 |
25 |
102 |
125 |
248 |
261 |
24 |
101 |
121 |
241 |
253 |
23 |
100 |
119 |
235 |
247 |
22 |
99 |
117 |
229 |
241 |
21 |
98 |
113 |
223 |
234 |
- |
97 |
110 |
217 |
228 |
- |
96 |
107 |
212 |
222 |
- |
95 |
102 |
207 |
218 |
- |
95 |
100 |
202 |
212 |
- |
94 |
98 |
197 |
207 |
- |
93 |
96 |
192 |
202 |
- |
92 |
94 |
187 |
196 |
- |
91 |
90 |
183 |
192 |
- |
90 |
89 |
179 |
188 |
- |
89 |
87 |
174 |
182 |
- |
88 |
84 |
170 |
178 |
- |
87 |
82 |
166 |
175 |
- |
86 |
80 |
163 |
171 |
- |
85 |
78 |
159 |
167 |
- |
84 |
77 |
156 |
163 |
- |
83 |
76 |
153 |
160 |
- |
82 |
75 |
149 |
156 |
- |
81 |
74 |
146 |
153 |
- |
80 |
72 |
143 |
150 |
- |
79 |
71 |
140 |
147 |
- |
78 |
70 |
137 |
143 |
- |
76 |
67 |
134 |
140 |
- |
75 |
66 |
131 |
137 |
- |
74 |
65 |
128 |
134 |
- |
73 |
64 |
126 |
132 |
- |
72 |
63 |
124 |
129 |
- |
71 |
62 |
121 |
127 |
- |
70 |
60 |
118 |
124 |
- |
69 |
59 |
116 |
122 |
- |
68 |
58 |
114 |
119 |
- |
67 |
57 |
111 |
117 |
- |
66 |
56 |
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