Hardness Conversion Chart Page 2

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3.6
285
285
63
141
99
973
40
65.7
30.9
300
3.65
277
277
61
136
96
942
38
65.2
29.8
292
3.7
269
269
59
132
93
911
37
64.6
29
284
3.75
262
262
58
130
91
895
36
64
27.5
275
3.8
255
255
56
125
89
865
35
63.6
26.6
269
3.85
248
248
55
123
87
849
34
62.9
25.2
261
3.9
241
241
53
118
84
818
33
62.6
24.3
255
3.95
235
235
51
114
81
787
32
62
23
247
4
229
229
50
112
79
772
31
61.6
22
241
4.05
223
223
49
110
77
756
30
60.7
20.8
234
4.1
217
217
48
107
76
741
228
Hardnes
s “B”
Scale
4.15
212
212
46
103
73
710
29
98
222
4.2
207
207
45
101
71
695
28
97
218
4.3
197
197
43
97
68
664
27
96
212
4.4
187
187
41
92
65
632
25
93
196
4.5
179
179
39
88
62
602
91
188
4.6
170
170
36
81
57
556
24
88.5
178
4.7
163
163
35
78
55
540
86
171
4.8
156
156
34
76
54
525
23
84.2
163
4.9
149
149
32
72
51
494
82
156
5
143
143
31
69
49
479
22
80
150
5.1
137
137
30
67
48
463
21
77
143
5.2
131
131
29.5
66
47
455
20.5
75
137
5.3
126
126
29
65
46
448
20
72.5
132
5.4
121
121
28
63
44
432
70
127
5.5
116
116
26
58
42
401
15
67
122

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