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Brass

Approximate Hardness Conversion No.s for
Cartridge Brass (70&perc Cu 30% Zn Alloy)

Vicker’s Hardness Number (HV) Rockwell Hardness Number B Scale, 100 Kgf (HRB) Rockwell Hardness Number F Scale, 600 Kgf (HRF) Rockwell Superficial Hardness No. 15T Scale, 15 Kgf (15T) Rockwell Superficial Hardness No. 30T Scale, 30 Kgf (30T) Rockwell Superficial Hardness No. 45T Scale, 45 Kgf (45T) Brinell Hardness No. 10mm Standard Ball, 500 Kgf (HBS)
196 93.5 110 90 77.5 66 169
194 109.5 65.5 167
192 93 777 65 166
190 92.5 109 76.5 64.5 164
188 92 89.5 64 162
186 91.5 108.5 76 63.5 161
184 91 75.5 63 159
182 90.5 108 89 62.5 157
180 90 107.5 75 62 156
178 89 74.5 61.5 154
176 88.5 107 61 152
174 88 88.5 74 60.5 150
172 87.5 106.5 73.5 60 149
170 87 59.5 147
168 86 106 88 73 59 146
166 85.5 72.5 58.5 144
164 85 105.5 72 58 142
162 84 105 87.5 57.5 141
160 83.5 71.5 56.5 139
158 83 104.5 71 56 138
156 82 104 87 70.5 55.5 136
154 81.5 103.5 70 54.5 135
152 80.5 103 54 133
150 80 86.5 69.5 53.5 131
148 79 102.5 69 53 129
146 78 102 68.5 52.5 128
144 77.5 101.5 86 68 51.5 126
142 77 101 67.5 51 124
140 76 100.5 85.5 67 50 122
138 75 100 66.5 49 121
136 74.5 99.5 85 66 48 120
134 73.5 99 65.5 47.5 118
132 73 98.5 84.5 65 46.5 116
130 72 98 84 64.5 45.5 114
128 71 97.5 63.5 45 113
126 70 97 83.5 63 44 112
124 69 96.5 62.5 43 110
122 68 96 83 62 42 108
120 67 95.5 61 41 106
118 66 95 82.5 60.5 40 105