sample bhn a
b
c
roll no indentation diameter (mm) brinell hardness number (load 3000 kgf,10 mm steel ball)
30 55 17 59 40
from table 6.4 82.5 6.2 88.7 5.48 6.23 6.133 92
calculated 82.4 88.6 116 87.6 90.9
42 22 47 06 31 50 53 19 15
6.23 5.87 5.29 6.1 5.4 5.35 5.45 5.216 5.5
88.7
87.6 100 126 91.9 120 123 118 129 115
32 54 07 11
5.41 5.6 5.35 5.48
121 111 123
14 41 49 48 05
5.7 5.5 5.35 5.43 5.55
107 116 123
56 21 51 57 33
5.6 5.4 5.4 5.7 5.56
111 121 121 107
126 92 121 123 118 116
114
120 111 123 116 107 115 123 119 113 111 120 120 107 113
96.78
94.98 (table)
120.5
119.7143 (table)
114.9091
115 (table)
mean