Approximate Hardness Conversion Numbers for Wrought Aluminum Products
Brinell Hardness No. 10mm Standard Ball, 3000 Kgf (HBS) Vicker's Hardness Number (HV) Rockwell Hardness Number B Scale, 100 Kgf (HRB) Rockwell Hardness Number E Scale, 100 Kgf (HRE) Rockwell Hardness Number H Scale, 60 Kgf (HRH) Rockwell Superficial Hardness No. 15T Scale, 15 Kgf (15T) Rockwell Superficial Hardness No. 30T Scale, 30 Kgf (30T) Rockwell Superficial Hardness No. 15W Scale, 15 Kgf (25W)
160 189 91 89 77 95
155 183 90 89 76 95
150 177 89 89 75 94
145 171 87 88 74 94
140 165 86 88 73 94
135 159 84 87 71 93
130 153 81 87 70 93
125 147 79 86 68 92
120 141 76 101 86 67 92
115 135 72 100 86 65 91
110 129 69 99 85 63 91
105 123 65 98 84 61 91
100 117 60     83 59 90
95 111 56 96 82 57 90
90 105 51 94 108 81 54 89
85 98 46 91 107 80 52 89
80 92 40 88 106 78 50 88
75 86 34 84 104 76 47 87
70 80 28 80 102 74 44 86
65 74 75 100 72 85
60 68 70 97 70 83
55 62 65 94 67 82
50 56 59 91 64 80
45 50 53 87 62 79
40 44 46 83 59 77